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NAME | SYNOPSIS | DESCRIPTION | EXAMPLES | SEE ALSO | AUTHOR | COLOPHON |
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IP-NEXTHOP(8) Linux IP-NEXTHOP(8)
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.
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.
dev NAME
is the output device.
onlink pretend that the nexthop is directly attached to
this link, even if it does not match any interface
prefix.
encap ENCAPTYPE ENCAPHDR
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
group GROUP
create a nexthop group. Group specification is id
with an optional weight (id,weight) and a '/' as a
separator between entries.
blackhole
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
vtep ips.
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.
dev DEV
show the nexthops using the given device.
vrf NAME
show the nexthops using devices associated with the
vrf name
master DEV
show the nexthops using devices enslaved to given
master device
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 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>
This page is part of the iproute2 (utilities for controlling
TCP/IP networking and traffic) project. Information about the
project can be found at
⟨http://www.linuxfoundation.org/collaborate/workgroups/networking/iproute2⟩.
If you have a bug report for this manual page, send it to
netdev@vger.kernel.org, shemminger@osdl.org. This page was
obtained from the project's upstream Git repository
⟨https://git.kernel.org/pub/scm/network/iproute2/iproute2.git⟩ on
2020-12-18. (At that time, the date of the most recent commit
that was found in the repository was 2020-12-15.) 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 man-pages@man7.org
iproute2 30 May 2019 IP-NEXTHOP(8)
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