HP 6125G HP 6125G & 6125G/XG Blade Switches Layer 3 - IP Routing Confi - Page 196

BKTunnel ID: 0x0 BKLabel: NULL State: Inactive Adv Age: 00h14m10s Tag: 1 The output shows that Switch A and Switch C communicate through Switch B, and Switch C has two routes to reach network 1.1.1.0/24: Switch CSwitch BSwitch A, which is the active route; Switch CSwitch DSwitch A, which is the backup route. When the link between Switch A and Switch B fails, Switch C can quickly detect the link failure. # Display route 1.1.1.0/24 on Switch C. display ip routing-table 1.1.1.0 24 verbose Routing Table : Public Summary Count : 1 Destination: 1.1.1.0/24 Protocol: BGP Process ID: 0 Preference: 0 Cost: 100 NextHop: 2.0.1.1 Interface: Vlan-interface201 BkNextHop: 0.0.0.0 BkInterface: RelyNextHop: 2.0.2.1 Neighbor : 2.0.1.1 Tunnel ID: 0x0 Label: NULL State: Active Adv Age: 00h09m54s Tag: 0 The output shows that Switch A and Switch C communicate through Switch D, and Switch C has one route Switch CSwitch DSwitch A to reach network 1.1.1.0/24. 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 1. Use the display current-configuration command to verify that the peer's AS number is correct. 2. Use the display bgp peer command to verify that the peer's IP address is correct. 3. If a loopback interface is used, verify that the loopback interface is specified with the peer connect-interface command. 4. If the peer is a non-direct EBGP peer, verify that the peer ebgp-max-hop command is configured. 5. Verify that a valid route to the peer is available. 6. Use the ping command to verify the connectivity to the peer. 7. Use the display tcp status command to check the TCP connection. 186