Troubleshooting Bgp; Bgp Peer Relationship Not Established - HP 3600 v2 series Configuration Manual

Troubleshooting BGP

BGP peer relationship not established

Symptom
Display BGP peer information by using the display bgp peer command. The state of the connection to a
peer cannot become established.
Analysis
To become BGP peers, any two routers must establish a TCP session using port 179 and exchange Open
messages successfully.
Solution
Use the display current-configuration command to check that the peer's AS number is correct.
1.
Use the display bgp peer command to check that the peer's IP address is correct.
2.
If a loopback interface is used, check that the loopback interface is specified with the peer
3.
connect-interface command.
If the peer is a non-direct eBGP peer, check that the peer ebgp-max-hop command is configured.
4.
Check that a valid route to the peer is available.
5.
Use the ping command to check the connectivity to the peer.
6.
Use the display tcp status command to check the TCP connection.
7.
Check whether an ACL disabling TCP port 179 is configured.
8.
258