ip-nexthop - nexthop object management
ip [ ip-OPTIONS ] nexthop { COMMAND | help }
ip nexthop { show | flush } SELECTOR
ip nexthop { add | replace } id ID NH
ip nexthop { get | del } id ID
SELECTOR := [ id ID ] [ dev DEV ] [ vrf NAME ] [ master DEV ] [ groups ] [ fdb ]
NH := { blackhole | [ via ADDRESS ] [ dev DEV ] [ onlink ] [ encap ENCAP ] [ fdb ] | group GROUP [ fdb ] }
ENCAP := [ ENCAP_MPLS ]
ENCAP_MPLS := mpls [ LABEL ] [ ttl TTL ]
GROUP := id[,weight[/...]
ip nexthop is used to manipulate entries in the kernel's nexthop tables.
add new nexthop entry
change the configuration of a nexthop or add new one
the address of the nexthop router, in the address family FAMILY. Address family must match address family of nexthop instance.
is the output device.
pretend that the nexthop is directly attached to this link, even if it does not match any interface prefix.
attach tunnel encapsulation attributes to this route.
ENCAPTYPE is a string specifying the supported encapsulation type. Namely:
mpls - encapsulation type MPLS
ENCAPHDR is a set of encapsulation attributes specific to the ENCAPTYPE.
mpls
MPLSLABEL - mpls label stack with labels separated by /
ttl TTL - TTL to use for MPLS header or 0 to inherit from IP header
create a nexthop group. Group specification is id with an optional weight (id,weight) and a '/' as a separator between entries.
create a blackhole nexthop
nexthop and nexthop groups for use with layer-2 fdb entries. A fdb nexthop group can only have fdb nexthops. Example: Used to represent a vxlan remote vtep ip. layer-2 vxlan fdb entry pointing to an ecmp nexthop group containing multiple remote vtep ips.
delete nexthop with given id.
show the contents of the nexthop table or the nexthops selected by some criteria.
show the nexthops using the given device.
show the nexthops using devices associated with the vrf name
show the nexthops using devices enslaved to given master device
show only nexthop groups
show only fdb nexthops and nexthop groups
flushes nexthops selected by some criteria. Criteria options are the same as show.
get a single nexthop by id
ip nexthop ls
Show all nexthop entries in the kernel.
ip nexthop add id 1 via 192.168.1.1 dev eth0
Adds an IPv4 nexthop with id 1 using the gateway 192.168.1.1 out device eth0.
ip nexthop add id 2 encap mpls 200/300 via 10.1.1.1 dev eth0
Adds an IPv4 nexthop with mpls encapsulation attributes attached to it.
ip nexthop add id 3 group 1/2
Adds a nexthop with id 3. The nexthop is a group using nexthops with ids 1 and 2 at equal weight.
ip nexthop add id 4 group 1,5/2,11
Adds a nexthop with id 4. The nexthop is a group using nexthops with ids 1 and 2 with nexthop 1 at weight 5 and nexthop 2 at weight 11.
ip nexthop add id 5 via 192.168.1.2 fdb
Adds a fdb nexthop with id 5.
ip nexthop add id 7 group 5/6 fdb
Adds a fdb nexthop group with id 7. A fdb nexthop group can only have fdb nexthops.
ip(8)
Original Manpage by David Ahern <dsahern@kernel.org>