Provided by: iproute2_5.5.0-1ubuntu1_amd64 bug

NAME

       ip-link - network device configuration

SYNOPSIS

       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 } ]
               [ 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 | 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

   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

                      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 Identifer to use. Note that numbers with a leading " 0 " or
                      " 0x " are interpreted as octal or hexadeimal, 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 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 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: 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 Identifer 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.

       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 } ]

                      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.

       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.

       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.

       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 dislpay.

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

EXAMPLES

       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

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

AUTHOR

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

iproute2                                           13 Dec 2012                                        IP-LINK(8)