IP-LINK(8) Linux IP-LINK(8)
NAME
ip-link - network device configuration
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 ]
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
can - Controller Area Network interface
dummy - Dummy network interface
ifb - Intermediate Functional Block device
ipoib - IP over Infiniband device
macvlan - Virtual interface base on link layer address (MAC)
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
numtxqueues QUEUE_COUNT
specifies the number of transmit queues for new device.
numrxqueues QUEUE_COUNT
specifies the number of receive queues for new device.
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 } ] [ ingress-qos-map QOS-MAP ] [ egress-qos-map QOS-MAP ]
protocol VLAN_PROTO - either 802.1Q or 802.1ad.
id VLANID - specifies the VID.
reorder_hdr { on | off } - specifies whether ethernet headers are reordered or not.
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.
ingress-qos-map QOS-MAP - defines a mapping between priority code points on incoming frames. The format is FROM:TO with
multiple mappings separated by spaces.
egress-qos-map QOS-MAP - the same as ingress-qos-map but for outgoing frames.
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 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.
port MIN MAX - specifies the range of port numbers to use as UDP source ports to communicate to the remote VXLAN tunnel end-
point.
[no]learning - specifies if unknown source link layer addresses and IP addresses are entered into the VXLAN device forward-
ing 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.
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 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 speci-
fied, 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 13 Dec 2012 IP-LINK(8)