Ip Bgp Neighbor Ebgp-Multihop - Alcatel-Lucent OmniSwitch 6850-48 Cli Reference Manual

BGP Commands

ip bgp neighbor ebgp-multihop

Allows external peers to communicate with each other even when they are not directly connected. The
absence of communication between disconnected peers can occur when a router that is not running BGP
sits between two BGP speakers; in such a scenario the BGP speakers are multiple hops from each other.
By enabling this command, you allow the BGP peers to speak to each other despite the non-BGP router
that sits between them.
ip bgp neighbor ip_address ebgp-multihop [ttl]
no ip bgp neighbor ip_address ebgp-multihop
Syntax Definitions
ip_address
ttl
Defaults
parameter
ttl
This command is disabled by default.
Platforms Supported
OmniSwitch 6850, 6855, 6850E, 9000E
Usage Guidelines
•
Use the no form of this command to disable multi-hop connections.
•
By default an external BGP peer is on a directly connected subnet. This command allows you to
configure an external BGP peer that is not directly connected and may be multiple hops away. It should
be used with caution and only with the guidance of qualified technical support.
•
As a safeguard against loops, the multi-hop connection will not be made if the only route to a multi-
hop peer is the default route (0.0.0.0).
•
The BGP peer is restarted after issuing this command.
Examples
-> ip bgp neighbor 172.22.2.115 ebgp-multihop 250
-> no ip bgp neighbor 172.22.2.115 ebgp-multihop 50
Release History
Release 6.1; command was introduced.
OmniSwitch CLI Reference Guide
32-bit IP address of the BGP peer.
The Time to Live for the multi-hop connection, in seconds. The range is
1 to 255.
default
255
June 2012 page 25-71