Reference Guide

bgp router-id
Assign a user-given ID to a BGP router.
C-Series, E-Series
Syntax
bgp router-id ip-address
To delete a user-assigned IP address, use the no bgp router-id command.
Parameters
ip-address Enter an IP address in dotted decimal format to reset only that BGP
neighbor.
Defaults The router ID is the highest IP address of the Loopback interface or, if you do not configure
Loopback interfaces, the highest IP address of a physical interface on the router.
Command Modes ROUTER BGP
Command History
Version 8.2.1.0 Introduced on the E-Series ExaScale.
Version 7.4.1.0 Introduced
Usage
Information
Peering sessions are reset when you change the router ID of a BGP router.
bgp soft-reconfig-backup
Use this command only when route-refresh is not negotiated to avoid the peer from resending messages.
C-Series, E-Series, S-Series, Z-Series, S4810
Syntax
bgp soft-reconfig-backup
To return to the default setting, use the no bgp soft-reconfig-backup command.
Defaults Off
Command Modes ROUTER BGP
Command History
Version 9.1(0.0) Added support for IPv6.
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.
Version 7.2.1.0 Introduced.
Usage
Information
When you enable soft-reconfiguration for a neighbor and you execute the clear ip bgp
soft in
command, the update database stored in the router is replayed and updates are
reevaluated. With this command, the replay and update process is triggered only if route-
refresh request is not negotiated with the peer. If the request is indeed negotiated (after
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