HP 6125G HP 6125G & 6125G/XG Blade Switches High Availability Configur - Page 53
Troubleshooting DLDP, Symptom, Analysis, Solution
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[DeviceA-GigabitEthernet1/1/3] quit [DeviceA] interface gigabitethernet 1/1/4 [DeviceA-GigabitEthernet1/1/4] shutdown %Jan 18 18:18:03:583 2010 DeviceA IFNET/3/LINK_UPDOWN: GigabitEthernet1/1/4 link status is DOWN. The output shows that the link status of both GigabitEthernet 1/1/3 and GigabitEthernet 1/1/4 is down. Assume that in this example, the unidirectional links are caused by cross-connected fibers. Correct the fiber connections, and then bring up the ports shut down earlier. # On Device A, bring up GigabitEthernet 1/1/3 and GigabitEthernet 1/1/4: [DeviceA-GigabitEthernet1/1/4] undo shutdown [DeviceA-GigabitEthernet1/1/4] %Jan 18 18:22:11:698 2010 DeviceA IFNET/3/LINK_UPDOWN: GigabitEthernet1/1/4 link status is UP. [DeviceA-GigabitEthernet1/1/4] quit [DeviceA] interface gigabitethernet 1/1/3 [DeviceA-GigabitEthernet1/1/3] undo shutdown [DeviceA-GigabitEthernet1/1/3] %Jan 18 18:22:46:065 2010 DeviceA IFNET/3/LINK_UPDOWN: GigabitEthernet1/1/3 link status is UP. The output shows that the link status of both GigabitEthernet 1/1/3 and GigabitEthernet 1/1/4 is now up. Troubleshooting DLDP Symptom Two DLDP-enabled devices, Device A and Device B, are connected through two fiber pairs, in which two fibers are cross-connected. The unidirectional links cannot be detected; all the four ports involved are in Advertisement state. Analysis The problem can be caused by the following. • The intervals to send Advertisement packets on Device A and Device B are not the same. • DLDP authentication modes/passwords on Device A and Device B are not the same. Solution Make sure the interval to send Advertisement packets, the authentication mode, and the password configured on Device A and Device B are the same. 46