How can I verify if a BGP router announces its BGP networks and propagates them to the global BGP mesh?
A. Use these commands in order to check if the IP blocks are announced to the directly connected ISP: • The show ip bgp neighbors [address] advertised-routes command shows which messages are being sent. • The show ip bgp neighbors [address] routes command shows which messages are being received. Note: The show ip bgp neighbors [address] advertise-routes command does not take into account any outbound policies you might have applied. In future Cisco IOS software releases, the command output will be changed to reflect the outbound policies. If there are two alternate paths to a destination, BGP always uses the best route to advertise. In order to verify how the IP blocks get propagated to the global BGP mesh via the directly connected ISP, log onto a route server on the Internet and look for the BGP entries of the prefix in the route server.
A. Use these commands to check if the IP blocks are announced to the directly connected ISP: • The show ip bgp neighbors [address] advertised-routes command shows which messages are being sent. • The show ip bgp neighbors [address] routes command shows which messages are being received. Note: The show ip bgp neighbors [address] advertise-routes command does not take into account any outbound policies you might have applied. In future Cisco IOS software releases, the command output will be changed to reflect the outbound policies. If there are two alternate paths to a destination, BGP always uses the best route to advertise. In order to verify how the IP blocks get propagated to the global BGP mesh via the directly connected ISP, log onto a route server on the Internet and look for the BGP entries of the prefix in the route server.
