Alcatel-Lucent 060321-10, Rev. B, Справочное руководство CLI

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ip bgp neighbor ebgp-multihop BGP Commands
page 19-72 OmniSwitch CLI Reference Guide March 2011
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 32-bit IP address of the BGP peer.
ttl The Time to Live for the multi-hop connection, in seconds. The range is
1 to 255.
Defaults
This command is disabled by default.
Platforms Supported
OmniSwitch 10K
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 7.1.1; command was introduced.
parameter default
ttl 255