reset ip bgp external ipv4 unicast <state>
Resets IPv4 unicast peering sessions for eBGP neighbors.
When used without the soft option, reset connections are dropped, both inbound and outbound.
- Sessions are not reset. Resend updates that have changed due to an export policy change or recalculate any updates received based on import policy changes.
- Re-read import policies and recalculate information in the BGP table based on import policy changes. This requires soft-reconfiguration inbound to be configured on the neighbor.
- Resets the outbound route filter (ORF) filter.
- Re-read export policies and resend updates that have changed due to an export policy change.
Use this command to reset IPv4 unicast peering sessions for eBGP neighbors. This forces BGP updates to be generated and new BGP policies to be applied.
Unless the soft option is used, all connections are dropped (a “hard reset”): TCP connections are terminated and all routes received from the neighbor are removed from the BGP routing table. Then the connection with the neighbor is re-established.
If the soft option is used, sessions are not reset. Changes to export policies are resent to peers. Changes to import policies causes recalculation of information in the BGP table (given that soft-reconfiguration inbound is configured on the peer).