ip-link(8) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | EXAMPLES | SEE ALSO | AUTHOR | COLOPHON

IP-LINK(8)                        Linux                       IP-LINK(8)

NAME         top

       ip-link - network device configuration

SYNOPSIS         top

       ip link  { COMMAND | help }

       ip link add [ link DEVICE ] [ name ] NAME
               [ txqueuelen PACKETS ]
               [ address LLADDR ] [ broadcast LLADDR ]
               [ mtu MTU ] [ index IDX ]
               [ numtxqueues QUEUE_COUNT ] [ numrxqueues QUEUE_COUNT ]
               [ gso_max_size BYTES ] [ gso_max_segs SEGMENTS ]
               type TYPE [ ARGS ]

       ip link delete { DEVICE | group GROUP } type TYPE [ ARGS ]

       ip link set { DEVICE | group GROUP }
               [ { up | down } ]
               [ type ETYPE TYPE_ARGS ]
               [ arp { on | off } ]
               [ dynamic { on | off } ]
               [ multicast { on | off } ]
               [ allmulticast { on | off } ]
               [ promisc { on | off } ]
               [ protodown { on | off } ]
               [ protodown_reason PREASON { on | off } ]
               [ trailers { on | off } ]
               [ txqueuelen PACKETS ]
               [ name NEWNAME ]
               [ address LLADDR ]
               [ broadcast LLADDR ]
               [ mtu MTU ]
               [ netns { PID | NETNSNAME } ]
               [ link-netnsid ID ]
               [ alias NAME ]
               [ vf NUM [ mac LLADDR ]
                        [ VFVLAN-LIST ]
                        [ rate TXRATE ]
                        [ max_tx_rate TXRATE ]
                        [ min_tx_rate TXRATE ]
                        [ spoofchk { on | off } ]
                        [ query_rss { on | off } ]
                        [ state { auto | enable | disable } ]
                        [ trust { on | off } ]
                        [ node_guid eui64 ]
                        [ port_guid eui64 ] ]
               [ { xdp | xdpgeneric | xdpdrv | xdpoffload } { off |
                       object FILE [ section NAME ] [ verbose ] |
                       pinned FILE } ]
               [ master DEVICE ]
               [ nomaster ]
               [ vrf NAME ]
               [ addrgenmode { eui64 | none | stable_secret | random } ]
               [ macaddr [ MACADDR ]
                         [ { flush | add | del } MACADDR ]
                         [ set MACADDR ] ]

                 ip link show [ DEVICE | group GROUP ] [ up ] [ master
                         DEVICE ] [ type ETYPE ] [ vrf NAME ]

                 ip link xstats type TYPE [ ARGS ]

                 ip link afstats [ dev DEVICE ]

                 ip link help [ TYPE ]

                 TYPE := [ bridge | bond | can | dummy | hsr | ifb |
                         ipoib | macvlan | macvtap | vcan | vxcan | veth
                         | vlan | vxlan | ip6tnl | ipip | sit | gre |
                         gretap | erspan | ip6gre | ip6gretap |
                         ip6erspan | vti | nlmon | ipvlan | ipvtap |
                         lowpan | geneve | bareudp | vrf | macsec |
                         netdevsim | rmnet | xfrm ]

                 ETYPE := [ TYPE | bridge_slave | bond_slave ]

                 VFVLAN-LIST := [ VFVLAN-LIST ] VFVLAN

                 VFVLAN := [ vlan VLANID [ qos VLAN-QOS ] [ proto VLAN-
                         PROTO ] ]

         ip link property add [ altname NAME .. ]

         ip link property del [ altname NAME .. ]

DESCRIPTION         top

   ip link add - add virtual link
       link DEVICE
              specifies the physical device to act operate on.

              NAME specifies the name of the new virtual device.

              TYPE specifies the type of the new device.

              Link types:

                      bridge - Ethernet Bridge device

                      bond - Bonding device

                      dummy - Dummy network interface

                      hsr - High-availability Seamless Redundancy device

                      ifb - Intermediate Functional Block device

                      ipoib - IP over Infiniband device

                      macvlan - Virtual interface base on link layer
                      address (MAC)

                      macvtap - Virtual interface based on link layer
                      address (MAC) and TAP.

                      vcan - Virtual Controller Area Network interface

                      vxcan - Virtual Controller Area Network tunnel
                      interface

                      veth - Virtual ethernet interface

                      vlan - 802.1q tagged virtual LAN interface

                      vxlan - Virtual eXtended LAN

                      ip6tnl - Virtual tunnel interface IPv4|IPv6 over
                      IPv6

                      ipip - Virtual tunnel interface IPv4 over IPv4

                      sit - Virtual tunnel interface IPv6 over IPv4

                      gre - Virtual tunnel interface GRE over IPv4

                      gretap - Virtual L2 tunnel interface GRE over IPv4

                      erspan - Encapsulated Remote SPAN over GRE and
                      IPv4

                      ip6gre - Virtual tunnel interface GRE over IPv6

                      ip6gretap - Virtual L2 tunnel interface GRE over
                      IPv6

                      ip6erspan - Encapsulated Remote SPAN over GRE and
                      IPv6

                      vti - Virtual tunnel interface

                      nlmon - Netlink monitoring device

                      ipvlan - Interface for L3 (IPv6/IPv4) based VLANs

                      ipvtap - Interface for L3 (IPv6/IPv4) based VLANs
                      and TAP

                      lowpan - Interface for 6LoWPAN (IPv6) over IEEE
                      802.15.4 / Bluetooth

                      geneve - GEneric NEtwork Virtualization
                      Encapsulation

                      bareudp - Bare UDP L3 encapsulation support

                      macsec - Interface for IEEE 802.1AE MAC Security
                      (MACsec)

                      vrf - Interface for L3 VRF domains

                      netdevsim - Interface for netdev API tests

                      rmnet - Qualcomm rmnet device

                      xfrm - Virtual xfrm interface

       numtxqueues QUEUE_COUNT
              specifies the number of transmit queues for new device.

       numrxqueues QUEUE_COUNT
              specifies the number of receive queues for new device.

       gso_max_size BYTES
              specifies the recommended maximum size of a Generic
              Segment Offload packet the new device should accept.

       gso_max_segs SEGMENTS
              specifies the recommended maximum number of a Generic
              Segment Offload segments the new device should accept.

       index IDX
              specifies the desired index of the new virtual device. The
              link creation fails, if the index is busy.

       VLAN Type Support
              For a link of type VLAN the following additional arguments
              are supported:

              ip link add link DEVICE name NAME type vlan [ protocol
              VLAN_PROTO ] id VLANID [ reorder_hdr { on | off } ] [ gvrp
              { on | off } ] [ mvrp { on | off } ] [ loose_binding { on
              | off } ] [ bridge_binding { on | off } ] [ ingress-qos-
              map QOS-MAP ] [ egress-qos-map QOS-MAP ]

                      protocol VLAN_PROTO - either 802.1Q or 802.1ad.

                      id VLANID - specifies the VLAN Identifier to use.
                      Note that numbers with a leading " 0 " or " 0x "
                      are interpreted as octal or hexadecimal,
                      respectively.

                      reorder_hdr { on | off } - specifies whether
                      ethernet headers are reordered or not (default is
                      on).

                          If reorder_hdr is on then VLAN header will be
                          not inserted immediately but only before
                          passing to the physical device (if this device
                          does not support VLAN offloading), the similar
                          on the RX direction - by default the packet
                          will be untagged before being received by VLAN
                          device. Reordering allows to accelerate
                          tagging on egress and to hide VLAN header on
                          ingress so the packet looks like regular
                          Ethernet packet, at the same time it might be
                          confusing for packet capture as the VLAN
                          header does not exist within the packet.

                          VLAN offloading can be checked by ethtool(8):

                              ethtool -k <phy_dev> | grep tx-vlan-
                              offload

                          where <phy_dev> is the physical device to
                          which VLAN device is bound.

                      gvrp { on | off } - specifies whether this VLAN
                      should be registered using GARP VLAN
                        Registration Protocol.

                      mvrp { on | off } - specifies whether this VLAN
                      should be registered using Multiple VLAN
                        Registration Protocol.

                      loose_binding { on | off } - specifies whether the
                      VLAN device state is bound to the physical device
                      state.

                      bridge_binding { on | off } - specifies whether
                      the VLAN device link state tracks the state of
                      bridge ports that are members of the VLAN.

                      ingress-qos-map QOS-MAP - defines a mapping of
                      VLAN header prio field to the Linux internal
                      packet priority on incoming frames. The format is
                      FROM:TO with multiple mappings separated by
                      spaces.

                      egress-qos-map QOS-MAP - defines a mapping of
                      Linux internal packet priority to VLAN header prio
                      field but for outgoing frames. The format is the
                      same as for ingress-qos-map.

                          Linux packet priority can be set by
                          iptables(8):

                              iptables -t mangle -A POSTROUTING [...] -j
                              CLASSIFY --set-class 0:4

                          and this "4" priority can be used in the
                          egress qos mapping to set VLAN prio "5":

                              ip link set veth0.10 type vlan egress 4:5

       VXLAN Type Support
              For a link of type VXLAN the following additional
              arguments are supported:

              ip link add DEVICE type vxlan id VNI [ dev PHYS_DEV  ] [ {
              group | remote } IPADDR ] [ local { IPADDR | any } ] [ ttl
              TTL ] [ tos TOS ] [ df DF ] [ flowlabel FLOWLABEL ] [
              dstport PORT ] [ srcport MIN MAX ] [ [no]learning ] [
              [no]proxy ] [ [no]rsc ] [ [no]l2miss ] [ [no]l3miss ] [
              [no]udpcsum ] [ [no]udp6zerocsumtx ] [ [no]udp6zerocsumrx
              ] [ ageing SECONDS ] [ maxaddress NUMBER ] [ [no]external
              ] [ gbp ] [ gpe ]

                      id VNI - specifies the VXLAN Network Identifier
                      (or VXLAN Segment Identifier) to use.

                      dev PHYS_DEV - specifies the physical device to
                      use for tunnel endpoint communication.

                      group IPADDR - specifies the multicast IP address
                      to join.  This parameter cannot be specified with
                      the remote parameter.

                      remote IPADDR - specifies the unicast destination
                      IP address to use in outgoing packets when the
                      destination link layer address is not known in the
                      VXLAN device forwarding database. This parameter
                      cannot be specified with the group parameter.

                      local IPADDR - specifies the source IP address to
                      use in outgoing packets.

                      ttl TTL - specifies the TTL value to use in
                      outgoing packets.

                      tos TOS - specifies the TOS value to use in
                      outgoing packets.

                      df DF - specifies the usage of the Don't Fragment
                      flag (DF) bit in outgoing packets with IPv4
                      headers. The value inherit causes the bit to be
                      copied from the original IP header. The values
                      unset and set cause the bit to be always unset or
                      always set, respectively. By default, the bit is
                      not set.

                      flowlabel FLOWLABEL - specifies the flow label to
                      use in outgoing packets.

                      dstport PORT - specifies the UDP destination port
                      to communicate to the remote
                        VXLAN tunnel endpoint.

                      srcport MIN MAX - specifies the range of port
                      numbers to use as UDP source ports to communicate
                      to the remote VXLAN tunnel endpoint.

                      [no]learning - specifies if unknown source link
                      layer addresses and IP addresses are entered into
                      the VXLAN device forwarding database.

                      [no]rsc - specifies if route short circuit is
                      turned on.

                      [no]proxy - specifies ARP proxy is turned on.

                      [no]l2miss - specifies if netlink LLADDR miss
                      notifications are generated.

                      [no]l3miss - specifies if netlink IP ADDR miss
                      notifications are generated.

                      [no]udpcsum - specifies if UDP checksum is
                      calculated for transmitted packets over IPv4.

                      [no]udp6zerocsumtx - skip UDP checksum calculation
                      for transmitted packets over IPv6.

                      [no]udp6zerocsumrx - allow incoming UDP packets
                      over IPv6 with zero checksum field.

                      ageing SECONDS - specifies the lifetime in seconds
                      of FDB entries learnt by the kernel.

                      maxaddress NUMBER - specifies the maximum number
                      of FDB entries.

                      [no]external - specifies whether an external
                      control plane (e.g. ip route encap) or the
                      internal FDB should be used.

                      gbp - enables the Group Policy extension (VXLAN-
                      GBP).

                          Allows to transport group policy context
                          across VXLAN network peers.  If enabled,
                          includes the mark of a packet in the VXLAN
                          header for outgoing packets and fills the
                          packet mark based on the information found in
                          the VXLAN header for incoming packets.

                          Format of upper 16 bits of packet mark
                          (flags);

                            +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
                            |-|-|-|-|-|-|-|-|-|D|-|-|A|-|-|-|
                            +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

                            D := Don't Learn bit. When set, this bit
                            indicates that the egress VTEP MUST NOT
                            learn the source address of the encapsulated
                            frame.

                            A := Indicates that the group policy has
                            already been applied to this packet.
                            Policies MUST NOT be applied by devices when
                            the A bit is set.

                          Format of lower 16 bits of packet mark (policy
                          ID):

                            +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
                            |        Group Policy ID        |
                            +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

                          Example:
                            iptables -A OUTPUT [...] -j MARK --set-mark
                          0x800FF

                      gpe - enables the Generic Protocol extension
                      (VXLAN-GPE). Currently, this is only supported
                      together with the external keyword.

       VETH, VXCAN Type Support
              For a link of types VETH/VXCAN the following additional
              arguments are supported:

              ip link add DEVICE type { veth | vxcan } [ peer name NAME
              ]

                      peer name NAME - specifies the virtual pair device
                      name of the VETH/VXCAN tunnel.

       IPIP, SIT Type Support
              For a link of type IPIPorSIT the following additional
              arguments are supported:

              ip link add DEVICE type { ipip | sit }  remote ADDR local
              ADDR [ encap { fou | gue | none } ] [ encap-sport { PORT |
              auto } ] [ encap-dport PORT ] [ [no]encap-csum ] [
              [no]encap-remcsum ] [  mode  { ip6ip | ipip | mplsip | any
              } ] [ external ]

                      remote ADDR - specifies the remote address of the
                      tunnel.

                      local ADDR - specifies the fixed local address for
                      tunneled packets.  It must be an address on
                      another interface on this host.

                      encap { fou | gue | none } - specifies type of
                      secondary UDP encapsulation. "fou" indicates Foo-
                      Over-UDP, "gue" indicates Generic UDP
                      Encapsulation.

                      encap-sport { PORT | auto } - specifies the source
                      port in UDP encapsulation.  PORT indicates the
                      port by number, "auto" indicates that the port
                      number should be chosen automatically (the kernel
                      picks a flow based on the flow hash of the
                      encapsulated packet).

                      [no]encap-csum - specifies if UDP checksums are
                      enabled in the secondary encapsulation.

                      [no]encap-remcsum - specifies if Remote Checksum
                      Offload is enabled. This is only applicable for
                      Generic UDP Encapsulation.

                      mode { ip6ip | ipip | mplsip | any } - specifies
                      mode in which device should run. "ip6ip" indicates
                      IPv6-Over-IPv4, "ipip" indicates "IPv4-Over-IPv4",
                      "mplsip" indicates MPLS-Over-IPv4, "any" indicates
                      IPv6, IPv4 or MPLS Over IPv4. Supported for SIT
                      where the default is "ip6ip" and IPIP where the
                      default is "ipip".  IPv6-Over-IPv4 is not
                      supported for IPIP.

                      external - make this tunnel externally controlled
                      (e.g. ip route encap).

       GRE Type Support
              For a link of type GRE or GRETAP the following additional
              arguments are supported:

              ip link add DEVICE type { gre | gretap }  remote ADDR
              local ADDR [ [no][i|o]seq ] [ [i|o]key KEY | no[i|o]key ]
              [ [no][i|o]csum ] [ ttl TTL ] [ tos TOS ] [ [no]pmtudisc ]
              [ [no]ignore-df ] [ dev PHYS_DEV ] [ encap { fou | gue |
              none } ] [ encap-sport { PORT | auto } ] [ encap-dport
              PORT ] [ [no]encap-csum ] [ [no]encap-remcsum ] [ external
              ]

                      remote ADDR - specifies the remote address of the
                      tunnel.

                      local ADDR - specifies the fixed local address for
                      tunneled packets.  It must be an address on
                      another interface on this host.

                      [no][i|o]seq - serialize packets.  The oseq flag
                      enables sequencing of outgoing packets.  The iseq
                      flag requires that all input packets are
                      serialized.

                      [i|o]key KEY | no[i|o]key - use keyed GRE with key
                      KEY. KEY is either a number or an IPv4 address-
                      like dotted quad.  The key parameter specifies the
                      same key to use in both directions.  The ikey and
                      okey parameters specify different keys for input
                      and output.

                      [no][i|o]csum - generate/require checksums for
                      tunneled packets.  The ocsum flag calculates
                      checksums for outgoing packets.  The icsum flag
                      requires that all input packets have the correct
                      checksum. The csum flag is equivalent to the
                      combination icsum ocsum .

                      ttl TTL - specifies the TTL value to use in
                      outgoing packets.

                      tos TOS - specifies the TOS value to use in
                      outgoing packets.

                      [no]pmtudisc - enables/disables Path MTU Discovery
                      on this tunnel.  It is enabled by default. Note
                      that a fixed ttl is incompatible with this option:
                      tunneling with a fixed ttl always makes pmtu
                      discovery.

                      [no]ignore-df - enables/disables IPv4 DF
                      suppression on this tunnel.  Normally datagrams
                      that exceed the MTU will be fragmented; the
                      presence of the DF flag inhibits this, resulting
                      instead in an ICMP Unreachable (Fragmentation
                      Required) message.  Enabling this attribute causes
                      the DF flag to be ignored.

                      dev PHYS_DEV - specifies the physical device to
                      use for tunnel endpoint communication.

                      encap { fou | gue | none } - specifies type of
                      secondary UDP encapsulation. "fou" indicates Foo-
                      Over-UDP, "gue" indicates Generic UDP
                      Encapsulation.

                      encap-sport { PORT | auto } - specifies the source
                      port in UDP encapsulation.  PORT indicates the
                      port by number, "auto" indicates that the port
                      number should be chosen automatically (the kernel
                      picks a flow based on the flow hash of the
                      encapsulated packet).

                      [no]encap-csum - specifies if UDP checksums are
                      enabled in the secondary encapsulation.

                      [no]encap-remcsum - specifies if Remote Checksum
                      Offload is enabled. This is only applicable for
                      Generic UDP Encapsulation.

                      external - make this tunnel externally controlled
                      (e.g. ip route encap).

       IP6GRE/IP6GRETAP Type Support
              For a link of type IP6GRE/IP6GRETAP the following
              additional arguments are supported:

              ip link add DEVICE type { ip6gre | ip6gretap } remote ADDR
              local ADDR [ [no][i|o]seq ] [ [i|o]key KEY | no[i|o]key ]
              [ [no][i|o]csum ] [ hoplimit TTL ] [ encaplimit ELIM ] [
              tclass TCLASS ] [ flowlabel FLOWLABEL ] [ dscp inherit ] [
              [no]allow-localremote ] [ dev PHYS_DEV ] [ external ]

                      remote ADDR - specifies the remote IPv6 address of
                      the tunnel.

                      local ADDR - specifies the fixed local IPv6
                      address for tunneled packets.  It must be an
                      address on another interface on this host.

                      [no][i|o]seq - serialize packets.  The oseq flag
                      enables sequencing of outgoing packets.  The iseq
                      flag requires that all input packets are
                      serialized.

                      [i|o]key KEY | no[i|o]key - use keyed GRE with key
                      KEY. KEY is either a number or an IPv4 address-
                      like dotted quad.  The key parameter specifies the
                      same key to use in both directions.  The ikey and
                      okey parameters specify different keys for input
                      and output.

                      [no][i|o]csum - generate/require checksums for
                      tunneled packets.  The ocsum flag calculates
                      checksums for outgoing packets.  The icsum flag
                      requires that all input packets have the correct
                      checksum. The csum flag is equivalent to the
                      combination icsum ocsum.

                      hoplimit TTL - specifies Hop Limit value to use in
                      outgoing packets.

                      encaplimit ELIM - specifies a fixed encapsulation
                      limit. Default is 4.

                      flowlabel FLOWLABEL - specifies a fixed flowlabel.

                      [no]allow-localremote - specifies whether to allow
                      remote endpoint to have an address configured on
                      local host.

                      tclass TCLASS - specifies the traffic class field
                      on tunneled packets, which can be specified as
                      either a two-digit hex value (e.g. c0) or a
                      predefined string (e.g. internet).  The value
                      inherit causes the field to be copied from the
                      original IP header. The values inherit/STRING or
                      inherit/00..ff will set the field to STRING or
                      00..ff when tunneling non-IP packets. The default
                      value is 00.

                      external - make this tunnel externally controlled
                      (or not, which is the default).  In the kernel,
                      this is referred to as collect metadata mode.
                      This flag is mutually exclusive with the remote,
                      local, seq, key, csum, hoplimit, encaplimit,
                      flowlabel and tclass options.

       IPoIB Type Support
              For a link of type IPoIB the following additional
              arguments are supported:

              ip link add DEVICE name NAME type ipoib [ pkey PKEY ] [
              mode MODE ]

                      pkey PKEY - specifies the IB P-Key to use.

                      mode MODE - specifies the mode (datagram or
                      connected) to use.

       ERSPAN Type Support
              For a link of type ERSPAN/IP6ERSPAN the following
              additional arguments are supported:

              ip link add DEVICE type { erspan | ip6erspan } remote ADDR
              local ADDR seq key KEY erspan_ver version [ erspan IDX ] [
              erspan_dir { ingress | egress } ] [ erspan_hwid hwid ] [
              [no]allow-localremote ] [ external ]

                      remote ADDR - specifies the remote address of the
                      tunnel.

                      local ADDR - specifies the fixed local address for
                      tunneled packets.  It must be an address on
                      another interface on this host.

                      erspan_ver version - specifies the ERSPAN version
                      number.  version indicates the ERSPAN version to
                      be created: 0 for version 0 type I, 1 for version
                      1 (type II) or 2 for version 2 (type III).

                      erspan IDX - specifies the ERSPAN v1 index field.
                      IDX indicates a 20 bit index/port number
                      associated with the ERSPAN traffic's source port
                      and direction.

                      erspan_dir { ingress | egress } - specifies the
                      ERSPAN v2 mirrored traffic's direction.

                      erspan_hwid hwid - an unique identifier of an
                      ERSPAN v2 engine within a system.  hwid is a 6-bit
                      value for users to configure.

                      [no]allow-localremote - specifies whether to allow
                      remote endpoint to have an address configured on
                      local host.

                      external - make this tunnel externally controlled
                      (or not, which is the default).  In the kernel,
                      this is referred to as collect metadata mode.
                      This flag is mutually exclusive with the remote,
                      local, erspan_ver, erspan, erspan_dir and
                      erspan_hwid options.

       GENEVE Type Support
              For a link of type GENEVE the following additional
              arguments are supported:

              ip link add DEVICE type geneve id VNI remote IPADDR [ ttl
              TTL ] [ tos TOS ] [ df DF ] [ flowlabel FLOWLABEL ] [
              dstport PORT ] [ [no]external ] [ [no]udpcsum ] [
              [no]udp6zerocsumtx ] [ [no]udp6zerocsumrx ]

                      id VNI - specifies the Virtual Network Identifier
                      to use.

                      remote IPADDR - specifies the unicast destination
                      IP address to use in outgoing packets.

                      ttl TTL - specifies the TTL value to use in
                      outgoing packets. "0" or "auto" means use whatever
                      default value, "inherit" means inherit the inner
                      protocol's ttl. Default option is "0".

                      tos TOS - specifies the TOS value to use in
                      outgoing packets.

                      df DF - specifies the usage of the Don't Fragment
                      flag (DF) bit in outgoing packets with IPv4
                      headers. The value inherit causes the bit to be
                      copied from the original IP header. The values
                      unset and set cause the bit to be always unset or
                      always set, respectively. By default, the bit is
                      not set.

                      flowlabel FLOWLABEL - specifies the flow label to
                      use in outgoing packets.

                      dstport PORT - select a destination port other
                      than the default of 6081.

                      [no]external - make this tunnel externally
                      controlled (or not, which is the default). This
                      flag is mutually exclusive with the id, remote,
                      ttl, tos and flowlabel options.

                      [no]udpcsum - specifies if UDP checksum is
                      calculated for transmitted packets over IPv4.

                      [no]udp6zerocsumtx - skip UDP checksum calculation
                      for transmitted packets over IPv6.

                      [no]udp6zerocsumrx - allow incoming UDP packets
                      over IPv6 with zero checksum field.

       Bareudp Type Support
              For a link of type Bareudp the following additional
              arguments are supported:

              ip link add DEVICE type bareudp dstport PORT ethertype
              ETHERTYPE [ srcportmin SRCPORTMIN ] [ [no]multiproto ]

                      dstport PORT - specifies the destination port for
                      the UDP tunnel.

                      ethertype ETHERTYPE - specifies the ethertype of
                      the L3 protocol being tunnelled.

                      srcportmin SRCPORTMIN - selects the lowest value
                      of the UDP tunnel source port range.

                      [no]multiproto - activates support for protocols
                      similar to the one specified by ethertype.  When
                      ETHERTYPE is "mpls_uc" (that is, unicast MPLS),
                      this allows the tunnel to also handle multicast
                      MPLS.  When ETHERTYPE is "ipv4", this allows the
                      tunnel to also handle IPv6. This option is
                      disabled by default.

       MACVLAN and MACVTAP Type Support
              For a link of type MACVLAN or MACVTAP the following
              additional arguments are supported:

              ip link add link DEVICE name NAME type { macvlan | macvtap
              } mode { private | vepa | bridge | passthru  [ nopromisc ]
              | source }

                      type { macvlan | macvtap } - specifies the link
                      type to use.  macvlan creates just a virtual
                      interface, while macvtap in addition creates a
                      character device /dev/tapX to be used just like a
                      tuntap device.

                      mode private - Do not allow communication between
                      macvlan instances on the same physical interface,
                      even if the external switch supports hairpin mode.

                      mode vepa - Virtual Ethernet Port Aggregator mode.
                      Data from one macvlan instance to the other on the
                      same physical interface is transmitted over the
                      physical interface. Either the attached switch
                      needs to support hairpin mode, or there must be a
                      TCP/IP router forwarding the packets in order to
                      allow communication. This is the default mode.

                      mode bridge - In bridge mode, all endpoints are
                      directly connected to each other, communication is
                      not redirected through the physical interface's
                      peer.

                      mode passthru [ nopromisc ] - This mode gives more
                      power to a single endpoint, usually in macvtap
                      mode. It is not allowed for more than one endpoint
                      on the same physical interface. All traffic will
                      be forwarded to this endpoint, allowing virtio
                      guests to change MAC address or set promiscuous
                      mode in order to bridge the interface or create
                      vlan interfaces on top of it. By default, this
                      mode forces the underlying interface into
                      promiscuous mode. Passing the nopromisc flag
                      prevents this, so the promisc flag may be
                      controlled using standard tools.

                      mode source - allows one to set a list of allowed
                      mac address, which is used to match against source
                      mac address from received frames on underlying
                      interface. This allows creating mac based VLAN
                      associations, instead of standard port or tag
                      based. The feature is useful to deploy 802.1x mac
                      based behavior, where drivers of underlying
                      interfaces doesn't allows that.

       High-availability Seamless Redundancy (HSR) Support
              For a link of type HSR the following additional arguments
              are supported:

              ip link add link DEVICE name NAME type hsr slave1
              SLAVE1-IF slave2 SLAVE2-IF [ supervision ADDR-BYTE ] [
              version { 0 | 1 } [ proto { 0 | 1 } ]

                      type hsr - specifies the link type to use, here
                      HSR.

                      slave1 SLAVE1-IF - Specifies the physical device
                      used for the first of the two ring ports.

                      slave2 SLAVE2-IF - Specifies the physical device
                      used for the second of the two ring ports.

                      supervision ADDR-BYTE - The last byte of the
                      multicast address used for HSR supervision frames.
                      Default option is "0", possible values 0-255.

                      version { 0 | 1 } - Selects the protocol version
                      of the interface. Default option is "0", which
                      corresponds to the 2010 version of the HSR
                      standard. Option "1" activates the 2012 version.

                      proto { 0 | 1 } - Selects the protocol at the
                      interface. Default option is "0", which
                      corresponds to the HSR standard. Option "1"
                      activates the Parallel Redundancy Protocol (PRP).

       BRIDGE Type Support
              For a link of type BRIDGE the following additional
              arguments are supported:

              ip link add DEVICE type bridge [ ageing_time AGEING_TIME ]
              [ group_fwd_mask MASK ] [ group_address ADDRESS ] [
              forward_delay FORWARD_DELAY ] [ hello_time HELLO_TIME ] [
              max_age MAX_AGE ] [ stp_state STP_STATE ] [ priority
              PRIORITY ] [ vlan_filtering VLAN_FILTERING ] [
              vlan_protocol VLAN_PROTOCOL ] [ vlan_default_pvid
              VLAN_DEFAULT_PVID ] [ vlan_stats_enabled
              VLAN_STATS_ENABLED ] [ vlan_stats_per_port
              VLAN_STATS_PER_PORT ] [ mcast_snooping MULTICAST_SNOOPING
              ] [ mcast_router MULTICAST_ROUTER ] [
              mcast_query_use_ifaddr MCAST_QUERY_USE_IFADDR ] [
              mcast_querier MULTICAST_QUERIER ] [ mcast_hash_elasticity
              HASH_ELASTICITY ] [ mcast_hash_max HASH_MAX ] [
              mcast_last_member_count LAST_MEMBER_COUNT ] [
              mcast_startup_query_count STARTUP_QUERY_COUNT ] [
              mcast_last_member_interval LAST_MEMBER_INTERVAL ] [
              mcast_membership_interval MEMBERSHIP_INTERVAL ] [
              mcast_querier_interval QUERIER_INTERVAL ] [
              mcast_query_interval QUERY_INTERVAL ] [
              mcast_query_response_interval QUERY_RESPONSE_INTERVAL ] [
              mcast_startup_query_interval STARTUP_QUERY_INTERVAL ] [
              mcast_stats_enabled MCAST_STATS_ENABLED ] [
              mcast_igmp_version IGMP_VERSION ] [ mcast_mld_version
              MLD_VERSION ] [ nf_call_iptables NF_CALL_IPTABLES ] [
              nf_call_ip6tables NF_CALL_IP6TABLES ] [ nf_call_arptables
              NF_CALL_ARPTABLES ]

                      ageing_time AGEING_TIME - configure the bridge's
                      FDB entries ageing time, ie the number of seconds
                      a MAC address will be kept in the FDB after a
                      packet has been received from that address. after
                      this time has passed, entries are cleaned up.

                      group_fwd_mask MASK - set the group forward mask.
                      This is the bitmask that is applied to decide
                      whether to forward incoming frames destined to
                      link-local addresses, ie addresses of the form
                      01:80:C2:00:00:0X (defaults to 0, ie the bridge
                      does not forward any link-local frames).

                      group_address ADDRESS - set the MAC address of the
                      multicast group this bridge uses for STP.  The
                      address must be a link-local address in standard
                      Ethernet MAC address format, ie an address of the
                      form 01:80:C2:00:00:0X, with X
                       in [0, 4..f].

                      forward_delay FORWARD_DELAY - set the forwarding
                      delay in seconds, ie the time spent in LISTENING
                      state (before moving to LEARNING) and in LEARNING
                      state (before moving to FORWARDING). Only relevant
                      if STP is enabled. Valid values are between 2 and
                      30.

                      hello_time HELLO_TIME - set the time in seconds
                      between hello packets sent by the bridge, when it
                      is a root bridge or a designated bridges.  Only
                      relevant if STP is enabled. Valid values are
                      between 1 and 10.

                      max_age MAX_AGE - set the hello packet timeout, ie
                      the time in seconds until another bridge in the
                      spanning tree is assumed to be dead, after
                      reception of its last hello message. Only relevant
                      if STP is enabled. Valid values are between 6 and
                      40.

                      stp_state STP_STATE - turn spanning tree protocol
                      on (STP_STATE > 0) or off (STP_STATE == 0).  for
                      this bridge.

                      priority PRIORITY - set this bridge's spanning
                      tree priority, used during STP root bridge
                      election.  PRIORITY is a 16bit unsigned integer.

                      vlan_filtering VLAN_FILTERING - turn VLAN
                      filtering on (VLAN_FILTERING > 0) or off
                      (VLAN_FILTERING == 0).  When disabled, the bridge
                      will not consider the VLAN tag when handling
                      packets.

                      vlan_protocol { 802.1Q | 802.1ad } - set the
                      protocol used for VLAN filtering.

                      vlan_default_pvid VLAN_DEFAULT_PVID - set the
                      default PVID (native/untagged VLAN ID) for this
                      bridge.

                      vlan_stats_enabled VLAN_STATS_ENABLED - enable
                      (VLAN_STATS_ENABLED == 1) or disable
                      (VLAN_STATS_ENABLED == 0) per-VLAN stats
                      accounting.

                      vlan_stats_per_port VLAN_STATS_PER_PORT - enable
                      (VLAN_STATS_PER_PORT == 1) or disable
                      (VLAN_STATS_PER_PORT == 0) per-VLAN per-port stats
                      accounting. Can be changed only when there are no
                      port VLANs configured.

                      mcast_snooping MULTICAST_SNOOPING - turn multicast
                      snooping on (MULTICAST_SNOOPING > 0) or off
                      (MULTICAST_SNOOPING == 0).

                      mcast_router MULTICAST_ROUTER - set bridge's
                      multicast router if IGMP snooping is enabled.
                      MULTICAST_ROUTER is an integer value having the
                      following meaning:

                              0 - disabled.

                              1 - automatic (queried).

                              2 - permanently enabled.

                      mcast_query_use_ifaddr MCAST_QUERY_USE_IFADDR -
                      whether to use the bridge's own IP address as
                      source address for IGMP queries
                      (MCAST_QUERY_USE_IFADDR > 0) or the default of
                      0.0.0.0 (MCAST_QUERY_USE_IFADDR == 0).

                      mcast_querier MULTICAST_QUERIER - enable
                      (MULTICAST_QUERIER > 0) or disable
                      (MULTICAST_QUERIER == 0) IGMP querier, ie sending
                      of multicast queries by the bridge (default:
                      disabled).

                      mcast_querier_interval QUERIER_INTERVAL - interval
                      between queries sent by other routers. if no
                      queries are seen after this delay has passed, the
                      bridge will start to send its own queries (as if
                      mcast_querier was enabled).

                      mcast_hash_elasticity HASH_ELASTICITY - set
                      multicast database hash elasticity, ie the maximum
                      chain length in the multicast hash table (defaults
                      to 4).

                      mcast_hash_max HASH_MAX - set maximum size of
                      multicast hash table (defaults to 512, value must
                      be a power of 2).

                      mcast_last_member_count LAST_MEMBER_COUNT - set
                      multicast last member count, ie the number of
                      queries the bridge will send before stopping
                      forwarding a multicast group after a "leave"
                      message has been received (defaults to 2).

                      mcast_last_member_interval LAST_MEMBER_INTERVAL -
                      interval between queries to find remaining members
                      of a group, after a "leave" message is received.

                      mcast_startup_query_count STARTUP_QUERY_COUNT -
                      set the number of IGMP queries to send during
                      startup phase (defaults to 2).

                      mcast_startup_query_interval
                      STARTUP_QUERY_INTERVAL - interval between queries
                      in the startup phase.

                      mcast_query_interval QUERY_INTERVAL - interval
                      between queries sent by the bridge after the end
                      of the startup phase.

                      mcast_query_response_interval
                      QUERY_RESPONSE_INTERVAL - set the Max Response
                      Time/Maximum Response Delay for IGMP/MLD queries
                      sent by the bridge.

                      mcast_membership_interval MEMBERSHIP_INTERVAL -
                      delay after which the bridge will leave a group,
                      if no membership reports for this group are
                      received.

                      mcast_stats_enabled MCAST_STATS_ENABLED - enable
                      (MCAST_STATS_ENABLED > 0) or disable
                      (MCAST_STATS_ENABLED == 0) multicast (IGMP/MLD)
                      stats accounting.

                      mcast_igmp_version IGMP_VERSION - set the IGMP
                      version.

                      mcast_mld_version MLD_VERSION - set the MLD
                      version.

                      nf_call_iptables NF_CALL_IPTABLES - enable
                      (NF_CALL_IPTABLES > 0) or disable
                      (NF_CALL_IPTABLES == 0) iptables hooks on the
                      bridge.

                      nf_call_ip6tables NF_CALL_IP6TABLES - enable
                      (NF_CALL_IP6TABLES > 0) or disable
                      (NF_CALL_IP6TABLES == 0) ip6tables hooks on the
                      bridge.

                      nf_call_arptables NF_CALL_ARPTABLES - enable
                      (NF_CALL_ARPTABLES > 0) or disable
                      (NF_CALL_ARPTABLES == 0) arptables hooks on the
                      bridge.

       MACsec Type Support
              For a link of type MACsec the following additional
              arguments are supported:

              ip link add link DEVICE name NAME type macsec [ [ address
              <lladdr> ] port PORT | sci SCI ] [ cipher CIPHER_SUITE ] [
              icvlen { 8..16 } ] [ encrypt { on | off } ] [ send_sci {
              on | off } ] [ end_station { on | off } ] [ scb { on | off
              } ] [ protect { on | off } ] [ replay { on | off } window
              { 0..2^32-1 } ] [ validate { strict | check | disabled } ]
              [ encodingsa { 0..3 } ]

                      address <lladdr> - sets the system identifier
                      component of secure channel for this MACsec
                      device.

                      port PORT - sets the port number component of
                      secure channel for this MACsec device, in a range
                      from 1 to 65535 inclusive. Numbers with a leading
                      " 0 " or " 0x " are interpreted as octal and
                      hexadecimal, respectively.

                      sci SCI - sets the secure channel identifier for
                      this MACsec device.  SCI is a 64bit wide number in
                      hexadecimal format.

                      cipher CIPHER_SUITE - defines the cipher suite to
                      use.

                      icvlen LENGTH - sets the length of the Integrity
                      Check Value (ICV).

                      encrypt on or encrypt off - switches between
                      authenticated encryption, or authenticity mode
                      only.

                      send_sci on or send_sci off - specifies whether
                      the SCI is included in every packet, or only when
                      it is necessary.

                      end_station on or end_station off - sets the End
                      Station bit.

                      scb on or scb off - sets the Single Copy Broadcast
                      bit.

                      protect on or protect off - enables MACsec
                      protection on the device.

                      replay on or replay off - enables replay
                      protection on the device.

                              window SIZE - sets the size of the replay
                              window.

                      validate strict or validate check or validate
                      disabled - sets the validation mode on the device.

                      encodingsa AN - sets the active secure association
                      for transmission.

       VRF Type Support
              For a link of type VRF the following additional arguments
              are supported:

              ip link add DEVICE type vrf table TABLE

                      table table id associated with VRF device

       RMNET Type Support
              For a link of type RMNET the following additional
              arguments are supported:

              ip link add link DEVICE name NAME type rmnet mux_id MUXID

                      mux_id MUXID - specifies the mux identifier for
                      the rmnet device, possible values 1-254.

       XFRM Type Support
              For a link of type XFRM the following additional arguments
              are supported:

              ip link add DEVICE type xfrm dev PHYS_DEV [ if_id IF_ID ]

                      dev PHYS_DEV - specifies the underlying physical
                      interface from which transform traffic is sent and
                      received.

                      if_id IF-ID - specifies the hexadecimal lookup key
                      used to send traffic to and from specific xfrm
                      policies. Policies must be configured with the
                      same key. If not set, the key defaults to 0 and
                      will match any policies which similarly do not
                      have a lookup key configuration.

   ip link delete - delete virtual link
       dev DEVICE
              specifies the virtual device to act operate on.

       group GROUP
              specifies the group of virtual links to delete. Group 0 is
              not allowed to be deleted since it is the default group.

       type TYPE
              specifies the type of the device.

   ip link set - change device attributes
       Warning: If multiple parameter changes are requested, ip aborts
       immediately after any of the changes have failed.  This is the
       only case when ip can move the system to an unpredictable state.
       The solution is to avoid changing several parameters with one ip
       link set call.  The modifier change is equivalent to set.

       dev DEVICE
              DEVICE specifies network device to operate on. When
              configuring SR-IOV Virtual Function (VF) devices, this
              keyword should specify the associated Physical Function
              (PF) device.

       group GROUP
              GROUP has a dual role: If both group and dev are present,
              then move the device to the specified group. If only a
              group is specified, then the command operates on all
              devices in that group.

       up and down
              change the state of the device to UP or DOWN.

       arp on or arp off
              change the NOARP flag on the device.

       multicast on or multicast off
              change the MULTICAST flag on the device.

       allmulticast on or allmulticast off
              change the ALLMULTI flag on the device. When enabled,
              instructs network driver to retrieve all multicast packets
              from the network to the kernel for further processing.

       promisc on or promisc off
              change the PROMISC flag on the device. When enabled,
              activates promiscuous operation of the network device.

       trailers on or trailers off
              change the NOTRAILERS flag on the device, NOT used by the
              Linux and exists for BSD compatibility.

       protodown on or protodown off
              change the PROTODOWN state on the device. Indicates that a
              protocol error has been detected on the port. Switch
              drivers can react to this error by doing a phys down on
              the switch port.

       protodown_reason PREASON on or off
              set PROTODOWN reasons on the device. protodown reason bit
              names can be enumerated under
              /etc/iproute2/protodown_reasons.d/. possible reasons bits
              0-31

       dynamic on or dynamic off
              change the DYNAMIC flag on the device. Indicates that
              address can change when interface goes down (currently NOT
              used by the Linux).

       name NAME
              change the name of the device. This operation is not
              recommended if the device is running or has some addresses
              already configured.

       txqueuelen NUMBER

       txqlen NUMBER
              change the transmit queue length of the device.

       mtu NUMBER
              change the MTU of the device.

       address LLADDRESS
              change the station address of the interface.

       broadcast LLADDRESS

       brd LLADDRESS

       peer LLADDRESS
              change the link layer broadcast address or the peer
              address when the interface is POINTOPOINT.

       netns NETNSNAME | PID
              move the device to the network namespace associated with
              name NETNSNAME or process PID.

              Some devices are not allowed to change network namespace:
              loopback, bridge, wireless. These are network namespace
              local devices. In such case ip tool will return "Invalid
              argument" error. It is possible to find out if device is
              local to a single network namespace by checking netns-
              local flag in the output of the ethtool:

                      ethtool -k DEVICE

              To change network namespace for wireless devices the iw
              tool can be used. But it allows to change network
              namespace only for physical devices and by process PID.

       alias NAME
              give the device a symbolic name for easy reference.

       group GROUP
              specify the group the device belongs to.  The available
              groups are listed in file /etc/iproute2/group.

       vf NUM specify a Virtual Function device to be configured. The
              associated PF device must be specified using the dev
              parameter.

                      mac LLADDRESS - change the station address for the
                      specified VF. The vf parameter must be specified.

                      vlan VLANID - change the assigned VLAN for the
                      specified VF. When specified, all traffic sent
                      from the VF will be tagged with the specified VLAN
                      ID. Incoming traffic will be filtered for the
                      specified VLAN ID, and will have all VLAN tags
                      stripped before being passed to the VF. Setting
                      this parameter to 0 disables VLAN tagging and
                      filtering. The vf parameter must be specified.

                      qos VLAN-QOS - assign VLAN QOS (priority) bits for
                      the VLAN tag. When specified, all VLAN tags
                      transmitted by the VF will include the specified
                      priority bits in the VLAN tag. If not specified,
                      the value is assumed to be 0. Both the vf and vlan
                      parameters must be specified. Setting both vlan
                      and qos as 0 disables VLAN tagging and filtering
                      for the VF.

                      proto VLAN-PROTO - assign VLAN PROTOCOL for the
                      VLAN tag, either 802.1Q or 802.1ad.  Setting to
                      802.1ad, all traffic sent from the VF will be
                      tagged with VLAN S-Tag.  Incoming traffic will
                      have VLAN S-Tags stripped before being passed to
                      the VF.  Setting to 802.1ad also enables an option
                      to concatenate another VLAN tag, so both S-TAG and
                      C-TAG will be inserted/stripped for
                      outgoing/incoming traffic, respectively.  If not
                      specified, the value is assumed to be 802.1Q. Both
                      the vf and vlan parameters must be specified.

                      rate TXRATE -- change the allowed transmit
                      bandwidth, in Mbps, for the specified VF.  Setting
                      this parameter to 0 disables rate limiting.  vf
                      parameter must be specified.  Please use new API
                      max_tx_rate option instead.

                      max_tx_rate TXRATE - change the allowed maximum
                      transmit bandwidth, in Mbps, for the specified VF.
                      Setting this parameter to 0 disables rate
                      limiting.  vf parameter must be specified.

                      min_tx_rate TXRATE - change the allowed minimum
                      transmit bandwidth, in Mbps, for the specified VF.
                      Minimum TXRATE should be always <= Maximum TXRATE.
                      Setting this parameter to 0 disables rate
                      limiting.  vf parameter must be specified.

                      spoofchk on|off - turn packet spoof checking on or
                      off for the specified VF.

                      query_rss on|off - toggle the ability of querying
                      the RSS configuration of a specific
                        VF. VF RSS information like RSS hash key may be
                      considered sensitive
                        on some devices where this information is shared
                      between VF and PF
                        and thus its querying may be prohibited by
                      default.

                      state auto|enable|disable - set the virtual link
                      state as seen by the specified VF. Setting to auto
                      means a reflection of the PF link state, enable
                      lets the VF to communicate with other VFs on this
                      host even if the PF link state is down, disable
                      causes the HW to drop any packets sent by the VF.

                      trust on|off - trust the specified VF user. This
                      enables that VF user can set a specific feature
                      which may impact security and/or performance.
                      (e.g. VF multicast promiscuous mode)

                      node_guid eui64 - configure node GUID for
                      Infiniband VFs.

                      port_guid eui64 - configure port GUID for
                      Infiniband VFs.

       xdp object | pinned | off
              set (or unset) a XDP ("eXpress Data Path") BPF program to
              run on every packet at driver level.  ip link output will
              indicate a xdp flag for the networking device. If the
              driver does not have native XDP support, the kernel will
              fall back to a slower, driver-independent "generic" XDP
              variant. The ip link output will in that case indicate
              xdpgeneric instead of xdp only. If the driver does have
              native XDP support, but the program is loaded under
              xdpgeneric object | pinned then the kernel will use the
              generic XDP variant instead of the native one.  xdpdrv has
              the opposite effect of requestsing that the automatic
              fallback to the generic XDP variant be disabled and in
              case driver is not XDP-capable error should be returned.
              xdpdrv also disables hardware offloads.  xdpoffload in ip
              link output indicates that the program has been offloaded
              to hardware and can also be used to request the "offload"
              mode, much like xdpgeneric it forces program to be
              installed specifically in HW/FW of the apater.

              off (or none ) - Detaches any currently attached XDP/BPF
              program from the given device.

              object FILE - Attaches a XDP/BPF program to the given
              device. The FILE points to a BPF ELF file (f.e. generated
              by LLVM) that contains the BPF program code, map
              specifications, etc. If a XDP/BPF program is already
              attached to the given device, an error will be thrown. If
              no XDP/BPF program is currently attached, the device
              supports XDP and the program from the BPF ELF file passes
              the kernel verifier, then it will be attached to the
              device. If the option -force is passed to ip then any
              prior attached XDP/BPF program will be atomically
              overridden and no error will be thrown in this case. If no
              section option is passed, then the default section name
              ("prog") will be assumed, otherwise the provided section
              name will be used. If no verbose option is passed, then a
              verifier log will only be dumped on load error.  See also
              EXAMPLES section for usage examples.

              section NAME - Specifies a section name that contains the
              BPF program code. If no section name is specified, the
              default one ("prog") will be used. This option is to be
              passed with the object option.

              verbose - Act in verbose mode. For example, even in case
              of success, this will print the verifier log in case a
              program was loaded from a BPF ELF file.

              pinned FILE - Attaches a XDP/BPF program to the given
              device. The FILE points to an already pinned BPF program
              in the BPF file system. The option section doesn't apply
              here, but otherwise semantics are the same as with the
              option object described already.

       master DEVICE
              set master device of the device (enslave device).

       nomaster
              unset master device of the device (release device).

       addrgenmode eui64|none|stable_secret|random
              set the IPv6 address generation mode

              eui64 - use a Modified EUI-64 format interface identifier

              none - disable automatic address generation

              stable_secret - generate the interface identifier based on
              a preset
                /proc/sys/net/ipv6/conf/{default,DEVICE}/stable_secret

              random - like stable_secret, but auto-generate a new
              random secret if none is set

       link-netnsid
              set peer netnsid for a cross-netns interface

       type ETYPE TYPE_ARGS
              Change type-specific settings. For a list of supported
              types and arguments refer to the description of ip link
              add above. In addition to that, it is possible to
              manipulate settings to slave devices:

       Bridge Slave Support
              For a link with master bridge the following additional
              arguments are supported:

              ip link set type bridge_slave [ fdb_flush ] [ state STATE
              ] [ priority PRIO ] [ cost COST ] [ guard { on | off } ] [
              hairpin { on | off } ] [ fastleave { on | off } ] [
              root_block { on | off } ] [ learning { on | off } ] [
              flood { on | off } ] [ proxy_arp { on | off } ] [
              proxy_arp_wifi { on | off } ] [ mcast_router
              MULTICAST_ROUTER ] [ mcast_fast_leave { on | off} ] [
              mcast_flood { on | off } ] [ mcast_to_unicast { on | off }
              ] [ group_fwd_mask MASK ] [ neigh_suppress { on | off } ]
              [ vlan_tunnel { on | off } ] [ isolated { on | off } ] [
              backup_port DEVICE ] [ nobackup_port ]

                      fdb_flush - flush bridge slave's fdb dynamic
                      entries.

                      state STATE - Set port state.  STATE is a number
                      representing the following states: 0 (disabled), 1
                      (listening), 2 (learning), 3 (forwarding), 4
                      (blocking).

                      priority PRIO - set port priority (allowed values
                      are between 0 and 63, inclusively).

                      cost COST - set port cost (allowed values are
                      between 1 and 65535, inclusively).

                      guard { on | off } - block incoming BPDU packets
                      on this port.

                      hairpin { on | off } - enable hairpin mode on this
                      port. This will allow incoming packets on this
                      port to be reflected back.

                      fastleave { on | off } - enable multicast fast
                      leave on this port.

                      root_block { on | off } - block this port from
                      becoming the bridge's root port.

                      learning { on | off } - allow MAC address learning
                      on this port.

                      flood { on | off } - open the flood gates on this
                      port, i.e. forward all unicast frames to this port
                      also. Requires proxy_arp and proxy_arp_wifi to be
                      turned off.

                      proxy_arp { on | off } - enable proxy ARP on this
                      port.

                      proxy_arp_wifi { on | off } - enable proxy ARP on
                      this port which meets extended requirements by
                      IEEE 802.11 and Hotspot 2.0 specifications.

                      mcast_router MULTICAST_ROUTER - configure this
                      port for having multicast routers attached. A port
                      with a multicast router will receive all multicast
                      traffic.  MULTICAST_ROUTER may be either 0 to
                      disable multicast routers on this port, 1 to let
                      the system detect the presence of of routers (this
                      is the default), 2 to permanently enable multicast
                      traffic forwarding on this port or 3 to enable
                      multicast routers temporarily on this port, not
                      depending on incoming queries.

                      mcast_fast_leave { on | off } - this is a synonym
                      to the fastleave option above.

                      mcast_flood { on | off } - controls whether a
                      given port will flood multicast traffic for which
                        there is no MDB entry.

                      mcast_to_unicast { on | off } - controls whether a
                      given port will replicate packets using unicast
                        instead of multicast. By default this flag is
                      off.

                      group_fwd_mask MASK - set the group forward mask.
                      This is the bitmask that is applied to decide
                      whether to forward incoming frames destined to
                      link-local addresses, ie addresses of the form
                      01:80:C2:00:00:0X (defaults to 0, ie the bridge
                      does not forward any link-local frames coming on
                      this port).

                      neigh_suppress { on | off } - controls whether
                      neigh discovery (arp and nd) proxy and suppression
                      is enabled on the port. By default this flag is
                      off.

                      vlan_tunnel { on | off } - controls whether vlan
                      to tunnel mapping is enabled on the port. By
                      default this flag is off.

                      backup_port DEVICE - if the port loses carrier all
                      traffic will be redirected to the configured
                      backup port

                      nobackup_port - removes the currently configured
                      backup port

       Bonding Slave Support
              For a link with master bond the following additional
              arguments are supported:

              ip link set type bond_slave [ queue_id ID ]

                      queue_id ID - set the slave's queue ID (a 16bit
                      unsigned value).

       MACVLAN and MACVTAP Support
              Modify list of allowed macaddr for link in source mode.

              ip link set type { macvlan | macvap } [ macaddr COMMAND
              MACADDR ...  ]

              Commands:
                      add - add MACADDR to allowed list

                      set - replace allowed list

                      del - remove MACADDR from allowed list

                      flush - flush whole allowed list

   ip link show - display device attributes
       dev NAME (default)
              NAME specifies the network device to show.

       group GROUP
              GROUP specifies what group of devices to show.

       up     only display running interfaces.

       master DEVICE
              DEVICE specifies the master device which enslaves devices
              to show.

       vrf NAME
              NAME speficies the VRF which enslaves devices to show.

       type TYPE
              TYPE specifies the type of devices to show.

              Note that the type name is not checked against the list of
              supported types - instead it is sent as-is to the kernel.
              Later it is used to filter the returned interface list by
              comparing it with the relevant attribute in case the
              kernel didn't filter already. Therefore any string is
              accepted, but may lead to empty output.

   ip link xstats - display extended statistics
       type TYPE
              TYPE specifies the type of devices to display extended
              statistics for.

   ip link afstats - display address-family specific statistics
       dev DEVICE
              DEVICE specifies the device to display address-family
              statistics for.

   ip link help - display help
       TYPE specifies which help of link type to display.

   GROUP
       may be a number or a string from the file /etc/iproute2/group
       which can be manually filled.

EXAMPLES         top

       ip link show
           Shows the state of all network interfaces on the system.

       ip link show type bridge
           Shows the bridge devices.

       ip link show type vlan
           Shows the vlan devices.

       ip link show master br0
           Shows devices enslaved by br0

       ip link set dev ppp0 mtu 1400
           Change the MTU the ppp0 device.

       ip link add link eth0 name eth0.10 type vlan id 10
           Creates a new vlan device eth0.10 on device eth0.

       ip link delete dev eth0.10
           Removes vlan device.

       ip link help gre
           Display help for the gre link type.

       ip link add name tun1 type ipip remote 192.168.1.1 local
       192.168.1.2 ttl 225 encap gue encap-sport auto encap-dport 5555
       encap-csum encap-remcsum
           Creates an IPIP that is encapsulated with Generic UDP
           Encapsulation, and the outer UDP checksum and remote checksum
           offload are enabled.

       ip link set dev eth0 xdp obj prog.o
           Attaches a XDP/BPF program to device eth0, where the program
           is located in prog.o, section "prog" (default section). In
           case a XDP/BPF program is already attached, throw an error.

       ip -force link set dev eth0 xdp obj prog.o sec foo
           Attaches a XDP/BPF program to device eth0, where the program
           is located in prog.o, section "foo". In case a XDP/BPF
           program is already attached, it will be overridden by the new
           one.

       ip -force link set dev eth0 xdp pinned /sys/fs/bpf/foo
           Attaches a XDP/BPF program to device eth0, where the program
           was previously pinned as an object node into BPF file system
           under name foo.

       ip link set dev eth0 xdp off
           If a XDP/BPF program is attached on device eth0, detach it
           and effectively turn off XDP for device eth0.

       ip link add link wpan0 lowpan0 type lowpan
           Creates a 6LoWPAN interface named lowpan0 on the underlying
           IEEE 802.15.4 device wpan0.

       ip link add dev ip6erspan11 type ip6erspan seq key 102 local
       fc00:100::2 remote fc00:100::1 erspan_ver 2 erspan_dir ingress
       erspan_hwid 17
           Creates a IP6ERSPAN version 2 interface named ip6erspan00.

SEE ALSO         top

       ip(8), ip-netns(8), ethtool(8), iptables(8)

AUTHOR         top

       Original Manpage by Michail Litvak <mci@owl.openwall.com>

COLOPHON         top

       This page is part of the iproute2 (utilities for controlling
       TCP/IP networking and traffic) project.  Information about the
       project can be found at 
       ⟨http://www.linuxfoundation.org/collaborate/workgroups/networking/iproute2⟩.
       If you have a bug report for this manual page, send it to
       netdev@vger.kernel.org, shemminger@osdl.org.  This page was
       obtained from the project's upstream Git repository
       ⟨https://git.kernel.org/pub/scm/network/iproute2/iproute2.git⟩ on
       2021-04-01.  (At that time, the date of the most recent commit
       that was found in the repository was 2021-03-22.)  If you
       discover any rendering problems in this HTML version of the page,
       or you believe there is a better or more up-to-date source for
       the page, or you have corrections or improvements to the
       information in this COLOPHON (which is not part of the original
       manual page), send a mail to man-pages@man7.org

iproute2                       13 Dec 2012                    IP-LINK(8)

Pages that refer to this page: veth(4)network_namespaces(7)ip(8)ip-macsec(8)ip-vrf(8)wg(8)wg-quick(8)