Manual Reference Pages  - IP-LINK (8)

NAME

ip-link - network device configuration

CONTENTS

Author

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 ]
type TYPE [ ARGS ]

    TYPE := [ vlan | veth | vcan | dummy | ifb | macvlan | can | bridge ]

    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:

vlan - 802.1q tagged virtual LAN interface

veth - Virtual ethernet interface

vcan - Virtual Local CAN interface

dummy - Dummy network interface

ifb - Intermediate Functional Block device

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

can - Controller Area Network interface

bridge - Ethernet Bridge device

    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 Fuction (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.

dynamic on or dynamic off
  change the DYNAMIC flag on the device.

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 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 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.

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 specified.

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 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.

    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

Removes vlan device.

SEE ALSO

ip(8)

AUTHOR

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


iproute2 IP-LINK (8) 20 Dec 2011
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