R3303-HP HSR6800 Routers High Availability Configuration Guide

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[RouterA-GigabitEthernet3/0/2] undo shutdown
[RouterA-GigabitEthernet3/0/2]
%Jan 18 18:22:11:698 2010 RouterA IFNET/3/LINK_UPDOWN: GigabitEthernet3/0/2 link
status is UP.
[RouterA-GigabitEthernet3/0/2] quit
[RouterA] interface gigabitethernet 3/0/1
[RouterA-GigabitEthernet3/0/1] undo shutdown
[RouterA-GigabitEthernet3/0/1]
%Jan 18 18:22:46:065 2010 RouterA IFNET/3/LINK_UPDOWN: GigabitEthernet3/0/1 link
status is UP.
The output indicates that the link status of both GigabitEthernet 3/0/1 and GigabitEthernet 3/0/2
is now up.
Troubleshooting DLDP
Symptom
Two DLDP-enabled devices, Router A and Router 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 Router A and Router B are not the same.
• DLDP authentication modes/passwords on Router A and Router B are not the same.
Solution
Make sure the interval to send Advertisement packets, the authentication mode, and the password
configured on Router A and Router B are the same.