ip-link


SYNOPSIS
       ip [ OPTIONS ] link  { COMMAND | help }


       OPTIONS := { -V[ersion] | -s[tatistics] | -r[esolve] | -f[amily] { inet
               | inet6 | ipx | dnet | link } | -o[neline] }

       ip link add [ link DEVICE ] [ name ] NAME
               [ txqueuelen PACKETS ]
               [ address LLADDR ] [ broadcast LLADDR ]
               [ mtu MTU ]
               [ numtxqueues QUEUE_COUNT ] [ numrxqueues QUEUE_COUNT ]
               type TYPE [ ARGS ]

       TYPE := [ bridge | can | dummy | ifb | ipoib | macvlan | vcan | veth |
               vlan | vxlan | ip6tnl | ipip | sit | gre | gretap | ip6gre |
               ip6gretap ]

       ip link delete DEVICE type TYPE [ ARGS ]

       ip link set { DEVICE | group GROUP } { up | down | arp { on | off } |
               promisc { on | off } |
               allmulticast { on | off } |
               dynamic { on | off } |
               multicast { on | off } |
               txqueuelen PACKETS |
               name NEWNAME |
               address LLADDR | broadcast LLADDR |
               mtu MTU |
               netns PID |
               netns NETNSNAME |
               alias NAME |
               vf NUM [ mac LLADDR ] [ vlan VLANID [ qos VLAN-QOS ] ] [ rate
               TXRATE ] [ spoofchk { on | off } ] |
               master DEVICE
               nomaster  }


       ip link show [ DEVICE | group GROUP ]


DESCRIPTION
   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
                      vcan - Virtual Local CAN 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 tuunel interface GRE over IPv4

                      ip6gre - Virtual tuunel interface GRE over IPv6

                      ip6gretap - Virtual L2 tuunel interface GRE over IPv6


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


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


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

              ip link add DEVICE type vxlan id ID [ dev PHYS_DEV  ] [ { group
              | remote } IPADDR ] [ local IPADDR ] [ ttl TTL ] [ tos TOS ] [
              port MIN MAX ] [ [no]learning ] [ [no]proxy ] [ [no]rsc ] [
              [no]l2miss ] [ [no]l3miss ]


                      id VNI - specifies the VXLAN Network Identifer (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


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


                      port 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 notifica-
                      tions are generated.


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



       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 [ [i|o]seq] ] [ [i|o]key KEY ] [  [i|o]csum ] [
              hoplimit TTL ] [ encaplimit ELIM ] [ tclass TCLASS ] [ flowlabel
              FLOWLABEL ] [ dscp inherit ] [ dev PHYS_DEV ]


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


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


                      [i|o]seq - serialize packets.  The oseq flag enables
                      sequencing of outgoing packets.  The iseq flag requires
                      that all input packets are serialized.

                      equivalent to the combination icsum ocsum.


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


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


                      flowlabel FLOWLABEL - specifies a fixed flowlabel.


                      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.



   ip link delete - delete virtual link
       DEVICE specifies the virtual  device to act operate on.  TYPE specifies
       the type of the device.



       dev DEVICE
              specifies the physical device to act operate on.


   ip link set - change device attributes
       dev DEVICE
              DEVICE specifies network device to operate on. When configuring
              SR-IOV Virtual Function (VF) devices, this keyword should spec-
              ify 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 name of the device.  This operation is not recom-
              mended 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 PID
              move the device to the network namespace associated with the
              process PID.


       netns NETNSNAME
              move the device to the network namespace associated with name
              NETNSNAME.


       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 associ-
              ated PF device must be specified using the dev parameter.

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


                      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.


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


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


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


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


       Warning: If multiple parameter changes are requested, ip aborts immedi-
       ately 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.


   ip link show - display device attributes
       dev NAME (default)
              NAME specifies the network device to show.  If this argument is
              omitted all devices in the default group are listed.


       group GROUP
              GROUP specifies what group of devices to show.


       up     only display running interfaces.


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

       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

iproute2                          13 Dec 2012                       IP-LINK(8)
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