NEC IP8800/S6700, IP8800/S6600, IP8800/S3600 Failure Analysis Method When Using Lldp Functions

3.Troubleshooting Functional Failures in Operation

3.16Communication Failures on Neighboring System Managing Function

3.16.1Unable 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

No.	Troubleshooting Steps and Command	Action
1	Check the status of LLDP functions using the	If "Status" is "Enabled," go to No. 2.
	show lldp command.
		If "Status" is "Disabled," the LLDP function is disabled. Enable the LLDP
		function.
2	Execute the show lldp command to check	If the information on the port to which the neighboring system is connected
	the port information.	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	If the Tx count has been incremented while the Rx has not, also check No. 1
	command to check for the statistics on the	through 3 on the neighboring system. If the Tx count also has been incremented on
	port to which the neighboring system is	the neighboring system, check the connection, since the systems may be
	connected.	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	If the Link has been established, go to No. 5.
	the status of the port to which the neighboring	If the Link is Down, check the line status. For checking the status, see
	system is connected.
		"3.4 Network Interface Communication Failure."
5	Execute the show lldp command to check	If "Neighbor Counts" is zero (0), check No. 1 through 5 on the neighboring system.
	the number of neighboring system	If the number of the neighboring system information is also set to zero (0) on the
	information on the port to which the	neighboring system, check the connection since it may be incorrect. LLDP control
	neighboring system is connected.	frames may have been discarded by filtering or QoS control.
		See "3.23.1 Checking Filtering/QoS Setting Information" to check for it.

3.16.2Unable 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	Execute the show oadp command to check	If "Status" is "Enabled," go to No. 2.
	the OADP operation.	If "Status" is "Disabled," the OADP function is disabled. Enable the OADP
		function.

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