NEC IP8800/S6700, IP8800/S6600, IP8800/S3600, IP8800/S2400, IP8800/S6300 manual Checking log, Route

3. Troubleshooting Functional Failures in Operation

Figure 3-7: Failure Analysis Procedure When IPv4 Communication Disabled

<IPv4 communication is disabled.>

Verify if there is a line failure log message.

No line failure log message exists.						A line failure log message exists.
					See the manual"Message Log Reference"and
	Check the Up/Down status of the interface.
					perform the action described in [Action]
					associated with each log message.
				VRF interface is not displayed
	up				Confirm Option License OP-NPAR.
			down
					Go to "3.4 Network Interface Communication
						Failure."
	Identify the extent of the failure using the ping
		command.

Communication between remote host and router is disabled.

Communication between the neighboring host and router is disabled.

Verify the status of address resolution using the show ip arp command.

Solved Unresolved

Verify the route information using the show ip route command.

No route information
exists or the next hop	The route
address is invalid.	information exists.

Verify the IP network of remote system. Otherwise, go to "3.4 Network Interface Communication Failure."

Go to "3.6.2 IP Addresses Cannot Be Assigned Using DHCP Function" and "3.23.1 Checking Filtering/QoS Setting Information."

Go to "3.7 IPv4 Unicast Routing Communication

Failure"

(1) Checking log

Communication may be interrupted by a line failure (or damage). The following procedure displays hardware error messages among this system's log messages.

For details about the log, see the manual "Message Log Reference."

1.Log in to the system.

2.Display the log using the show logging command.

3.The date and time when an error occurred are displayed in the log. Check to see if a log was displayed at the date/ time when communication was disabled.

4.For detailed information about the failure in the log displayed at the time and date of the communication interruption and the actions for failures, see the manual "Message Log Reference." Follow the instruction.

5.If there is no log recorded at the time and date when communication was disabled, go to "(2)Checking interface status."

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