3Com Switch 8800 Advanced Software V5 Configuration Guide

Troubleshooting BGP Configuration 467
Status codes: * - valid, > - best, d - damped,
h - history, i - internal, s - suppressed, S - Stale
Origin : i - IGP, e - EGP, ? - incomplete
Network NextHop MED LocPrf PrefVal Path/Ogn
*>i 1.0.0.0 193.1.1.1 0 200 0 100i
* i 192.1.1.1 0 100 0 100i
You can find route 1.0.0.0/8 learned from SwitchC is the optimal.
Troubleshooting BGP
Configuration
No BGP Peer
Relationship Established
Symptom
Display BGP peer information using the display bgp peer command. The state of
the connection to the peer cannot become established.
Analysis
To become BGP peers, any two routers need to establish a TCP session using port
179 and exchange open messages successfully.
Processing steps
1 Use the display current-configuration command to verify the peer’s AS number.
2 Use the display bgp peer command to verify the peer’s IP address.
3 If the loopback interface is used, check whether the peer connect-interface
command is configured.
4 If the peer is a non-direct EBGP peer, check whether the peer ebgp-max-hop
command is configured.
5 Check whether a route to the peer is available in the routing table.
6 Use the ping command to check connectivity.
7 Use the display tcp status command to check the TCP connection.
8 Check whether an ACL disabling TCP port 179 is configured.