Troubleshooting Dldp - HP 6125G Configuration Manual

[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.
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