ADTRAN AOS Version R10.1.0 Command Reference Manual page 2881

Command Reference Guide
ebgp-multihop <value>
Use the ebgp-multihop command to configure the maximum hop count of Border Gateway Protocol
(BGP) messages to a neighbor. This command can be applied to either the default or nondefault VPN
routing and forwarding (VRF) instance. Use the no form of this command to return to the default setting.
Syntax Description
<value>
Default Values
By default, BGP multihop is set to 1.
Command History
Release 8.1
Release 18.3
Functional Notes
The ebgp-multihop command can be used to allow a BGP neighbor on a network that is not directly
connected on either the default or nondefault VRF instance. If the behavior is to be created on a nondefault
VRF instance, the VRF instance must first be created using the command
on page 1460. Once you have created the nondefault VRF instance, you can configure the BGP neighbor
settings for the VRF instance using the command
Configuration mode. For example, to configure the BGP neighbor characteristics for the nondefault VRF
instance RED1, enter the following commands:
(config)#vrf RED1 route-distinguisher ip 192.17.250.24:33
(config)#router bgp 100
(config-bgp)#vrf RED1
(config-bgp-vrf)#neighbor 10.20.1.1
(config-bgp-vrf-neighbor)#
For more information about VRF and Multi-VRF BGP configuration, refer to the configuration guides
Configuring IPv4 Multi-VRF in AOS (article number 2156) and Configuring BGP in AOS for Releases
18.03.00/R10.1.0 or Later (article number 3524) available online at https://supportforums.adtran.com.
The ebgp-multihop command allows a BGP neighbor to be on a network that is not directly connected.
Normally, BGP peers are directly connected. In certain applications, a non-BGP device, such as a firewall
or router, can reside between BGP peers. In this case, the ebgp-multihop command is required to allow
updates to have a time to live (TTL) greater than 1 and to allow received BGP updates to be added to the
BGP table when the next-hop address is not directly connected.
60000CRG0-35E
Specifies the maximum hop count of BGP messages to a neighbor.
Range is 1 to 255 hops.
Command was introduced.
Command was incorporated into Multi-VRF BGP functionality.
vrf <name> on page 2877
Copyright © 2012 ADTRAN, Inc.
BGP Neighbor Command Set
vrf <name> route-distinguisher
from the router's BGP
2881