Reference Guide

neighbor update-source
Enable the E-Series software to use Loopback interfaces for TCP connections for BGP sessions.
S4820T
Syntax
neighbor {ip-address | peer-group-name} update-source interface
To use the closest interface, use the no neighbor {ip-address | peer-group-
name} update-source interface command.
Parameters
ip-address Enter the IP address of the peer router in dotted decimal format.
peer-group-name Enter the name of the peer group to disable all routers within the peer
group.
interface Enter the keyword loopback then a number of the Loopback
interface. The range is from 0 to 16383.
Defaults Not configured.
Command Modes ROUTER BGP
Command History
This guide is platform-specific. For command information about other platforms, refer to the
relevant FTOS Command Line Reference Guide .
The following is a list of the FTOS version history for this command.
Version 8.3.19.0 Introduced on the S4820T.
Version 8.3.11.1 Introduced on the Z9000.
Version 8.3.7.0 Introduced on the S4810.
Version 7.8.1.0 Introduced on the S-Series.
Version 7.7.1.0 Introduced on the C-Series.
Usage
Information
Loopback interfaces are up constantly and the BGP session may need one interface constantly
up to stabilize the session. The neighbor update-source command is not necessary for
directly connected internal BGP sessions.
neighbor weight
Assign a weight to the neighbor connection, which is used to determine the best path.
S4820T
Syntax
neighbor {ip-address | peer-group-name} weight weight
To remove a weight value, use the no neighbor {ip-address | peer-group-
name} weight command.
Parameters
ip-address Enter the IP address of the peer router in dotted decimal format.
peer-group-name Enter the name of the peer group to disable all routers within the peer
group.
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