NEC IP8800/S2400 Series, Troubleshooting Manual

Page: 178 / 250

3.
Troubleshooting Functional Failures in Operation
116
3.16 Communication Failures on Neighboring System
Managing Function
3.16.1 Unable to Obtain Neighboring System Information via LLDP
Function
If it is not possible to acquire correctly neighbor system information with LLDP functions, isolate the problem using
the failure analysis method shown in the table below.
Table 3-63: Failure Analysis Method When Using LLDP Functions
3.16.2 Unable to Obtain Neighboring System Information via OADP
Function
If it is not possible to acquire the neighboring system information correctly with the OADP function, isolate the
problem using the failure analysis method shown in the table below.
Table 3-64: Failure Analysis When Using OADP Function
No. Troubleshooting Steps and Command Action
1 Check the status of LLDP functions using the
show lld p command.
If "Status" is "Enabled," go to No. 2.
If "Status" is "Disabled," the LLDP function is disabled. Enable the LLDP
function.
2 Execute the
show lldp
command to check
the port information.
If the information on the port to which the neighboring system is connected
appears, go to No. 3.
If the information on the port to which the neighboring system is connected does
not appear, the port is not covered by the LLDP function. Enable the LLDP
function for the port.
3 Execute the
show lldp statistics
command to check for the statistics on the
port to which the neighboring system is
connected.
If the Tx count has been incremented while the Rx has not, also check No. 1
through 3 on the neighboring system. If the Tx count also has been incremented on
the neighboring system, check the connection, since the systems may be
incorrectly connected.
If the Discard count has been incremented, check the connection between the
systems.
Otherwise, go to No. 4.
4 Execute the show lldp command to check
the status of the port to which the neighboring
system is connected.
If the Link has been established, go to No. 5.
If the Link is Down, check the line status. For checking the status, see
"
3.4 Network Interface Communication Failure ."
5 Execute the show lldp command to check
the number of neighboring system
information on the port to which the
neighboring system is connected.
If "Neighbor Counts" is zero (0), check No. 1 through 5 on the neighboring system.
If the number of the neighboring system information is also set to zero (0) on the
neighboring system, check the connection since it may be incorrect. LLDP control
frames may have been discarded by filtering or QoS control.
See "
3.23.1 Checking Filtering/QoS Setting Information " to check for it.
No. Troubleshooting Steps and Command Action
1 Execute the
show oadp
command to check
the OADP operation.
If "Status" is "Enabled," go to No. 2.
If "Status" is "Disabled," the OADP function is disabled. Enable the OADP
function.