Troubleshooting dldp, Symptom, Analysis – H3C Technologies H3C S7500E Series Switches User Manual
Page 71: Solution
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[DeviceA-GigabitEthernet2/0/1]
%Jan 18 18:22:46:065 2010 DeviceA IFNET/3/LINK_UPDOWN: GigabitEthernet2/0/1 link status is
UP.
The output above indicates that the link status of both GigabitEthernet 2/0/1 and GigabitEthernet 2/0/2
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.
z
The intervals to send Advertisement packets on Device A and Device B are not the same.
z
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.