ip nexthop is used to manipulate entries in the kernel's nexthop
ip nexthop add id ID
add new nexthop entry
ip nexthop replace id ID
change the configuration of a nexthop or add new one
via [ FAMILY ] ADDRESS
the address of the nexthop router, in the address
family FAMILY. Address family must match address
family of nexthop instance.
is the output device.
onlink pretend that the nexthop is directly attached to
this link, even if it does not match any interface
encap ENCAPTYPE ENCAPHDR
attach tunnel encapsulation attributes to this
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.mplsMPLSLABEL - mpls label stack with labels
separated by /ttl TTL - TTL to use for MPLS header or 0
to inherit from IP header
group GROUP [type TYPE [ TYPE_ARGS ] ]
create a nexthop group. Group specification is id
with an optional weight (id,weight) and a '/' as a
separator between entries.
TYPE is a string specifying the nexthop group type.
mpath - Multipath nexthop group backed by
the hash-threshold algorithm. The default
when the type is unspecified.
resilient - Resilient nexthop group. Group
is resilient to addition and deletion of
TYPE_ARGS is a set of attributes specific to the
TYPE.resilientbuckets BUCKETS - Number of nexthop
buckets. Cannot be changed for an
idle_timer IDLE - Time in seconds in
which a nexthop bucket does not see
traffic and is therefore considered idle.
Default is 120 seconds
unbalanced_timer UNBALANCED - Time in
seconds in which a nexthop group is
unbalanced and is therefore considered
unbalanced. The kernel will try to
rebalance unbalanced groups, which might
result in some flows being reset. A value
of 0 means that no rebalancing will take
place. Default is 0 seconds
create a blackhole nexthop
fdb 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
ip nexthop delete id ID
delete nexthop with given id.
ip nexthop show
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
show the nexthops using devices enslaved to given
groups show only nexthop groups
fdb show only fdb nexthops and nexthop groups
ip nexthop flush
flushes nexthops selected by some criteria. Criteria
options are the same as show.
ip nexthop get id ID
get a single nexthop by id
ip nexthop bucket show
show the contents of the nexthop bucket table or the
nexthop buckets selected by some criteria.
show the nexthop buckets that belong to a nexthop
group with a given id
show the nexthop buckets that hold a nexthop with a
show the nexthop buckets using the given device
show the nexthop buckets using devices associated
with the vrf name
show the nexthop buckets using devices enslaved to
given master device
ip nexthop bucket get id ID index INDEX
get a single nexthop bucket by nexthop group id and bucket
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 nexthop add id 10 group 1/2 type resilient buckets 32
Add a resilient nexthop group with id 10 and 32 nexthop
This page is part of the iproute2 (utilities for controlling
TCP/IP networking and traffic) project. Information about the
project can be found at
If you have a bug report for this manual page, send it to
firstname.lastname@example.org, email@example.com. This page was
obtained from the project's upstream Git repository
2021-08-27. (At that time, the date of the most recent commit
that was found in the repository was 2021-08-18.) If you
discover any rendering problems in this HTML version of the page,
or you believe there is a better or more up-to-date source for
the page, or you have corrections or improvements to the
information in this COLOPHON (which is not part of the original
manual page), send a mail to firstname.lastname@example.org
iproute2 30 May 2019 IP-NEXTHOP(8)