Troubleshooting Bgp; Bgp Peer Relationship Not Established - HP MSR2000 series Configuration Manual

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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 verify that the peer's AS number is correct.
1.
Use the display bgp peer command to verify that the peer's IP address is correct.
2.
If a loopback interface is used, verify that the loopback interface is specified with the peer
3.
connect-interface command.
If the peer is a non-direct EBGP peer, verify that the peer ebgp-max-hop command is configured.
4.
Verify that a valid route to the peer is available.
5.
Use the ping command to verify the connectivity to the peer.
6.
Use the display tcp status command to check the TCP connection.
7.
Check whether an ACL is applied to disable TCP port 179.
8.
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