Reference Guide
810 | IPv6 Border Gateway Protocol (IPv6 BGP)
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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
Command
History
Usage
Information
Peering sessions are reset when you change the router ID of a BGP router.
bgp soft-reconfig-backup 
c e
t
Use this command only when route-refresh is not negotiated between peers to avoid 
having a peer re-send 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 BGPV6 ADDRESS FAMILY (conf-router_bgpv6_af)
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.
Related
Commands
Command
History
Version 8.3.19.0 Introduced on S4820T
Version 8.4.2.1 Introduced on C-Series and S4810
Version 8.2.1.0 Introduced on E-Series ExaScale
Version 7.4.1.0 Introduced on E-Series TeraScale
clear ip bgp ipv6 unicast 
soft in
Activate inbound policies for IPv6 routes without resetting the BGP 
TCP session.
Version 8.3.19.0 Introduced on S4820T
Version 8.4.1.0 Added support for IPv4 multicast and IPv6 unicast address families
Version 7.8.1.0 Introduced support on S4810
Version 7.7.1.0 Introduced support on C-Series
Version 7.2.1.0 Introduced on E-Series TeraScale










