Deployment Guide

344 | Border Gateway Protocol IPv4 (BGPv4)
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Command Modes
ROUTER BGP
Command
History
bgp router-id
c e s
Assign a user-given ID to a BGP router.
Syntax
bgp router-id ip-address
To delete a user-assigned IP address, enter no bgp router-id.
Parameters
Defaults
The router ID is the highest IP address of the Loopback interface or, if no Loopback interfaces are
configured, the highest IP address of a physical interface on the router.
Command Modes
ROUTER BGP
Usage
Information
Peering sessions are reset when you change the router ID of a BGP router.
This command automatically restarts the BGP instance for the configuration to take effect.
Command
History
bgp soft-reconfig-backup
c e s
Use this command only when route-refresh is not negotiated between peers to avoid having a peer
resend BGP updates.
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
Usage
Information
When soft-reconfiguration is enabled for a neighbor and the clear ip bgp soft in is executed, 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 (upon execution of clear ip bgp soft in), then BGP sends a
route-refresh request to the neighbor and receives all of the peer’s updates.
Version 8.4.1.0 Introduced on E-Series TeraScale, C-Series, and S-Series.
Version 8.3.1.2 Introduced on E-Series ExaScale.
ip-address
Enter an IP address in dotted decimal format to reset only that BGP neighbor.
Version 7.8.1.0 Introduced support on S-Series
Version 7.7.1.0 Introduced support on C-Series
Note: Starting in the C-Series release 8.4.7.0, this command is no longer supported.