NEC IP8800/S6300, IP8800/S6600, IP8800/S3600, IP8800/S2400 manual Vrrp Failure Analysis Method, 107

3. Troubleshooting Functional Failures in Operation

No.	Troubleshooting Steps and Command	Action
11	Execute show vrrpstatus command	If the virtual router is set to "Initial," check the following items:
	with "detail" parameter specified to confirm	• If the current priority is not set to zero (0), delete the non-operation factors
	that the virtual router status is not "Initial."	displayed in the "Admin State" column. (For non-operation factors, see
		"Operation Commands.")
		• Execute the show logging command to check the log, and if "The VRRP
		virtual MAC address entry can't be registered at hardware tables" is displayed,
		setting up the hardware MAC address table is failed. Delete the configuration
		for the current virtual router and reconfigure the configuration with a different
		virtual router number, or modify the ID of the VLAN where the virtual router is
		set up, then the virtual router may operate. [IP8800/S3600]
		If the virtual router is not set to "Initial," check the operation of the remote system
		constituting the same virtual router.

3.13.3Communication with VRRP Configuration in IPv6 Network Is Disabled

Isolate the problem according to the failure analysis methods shown in the table below if communication with the VRRP configuration is disabled.

Table 3-62: VRRP Failure Analysis Method

No.	Troubleshooting Steps and Command	Action
1	Check the status of the remote systems and	For the configuration constituting a single virtual router, if one system is master
	this system constituting a same virtual router	and the other systems are backup, check the following:
	and confirm that one system is used as a	• If terminals are connected under the virtual router without other routers between
	master router and other systems are used as	them, confirm that the virtual IP address of the virtual router is configured as a
	backup routers.	default gateway in the network settings of each terminal.
		• Check for the routing information in devices on the communication paths
		including this system.
		Go to No. 2 if there is no problem in terminal setting and in the route information
		in systems on the communication route.
		Go to No. 3 if the status of a virtual router is not correct.
2	Execute the show vlan command with	• If the physical port is set to "Blocking," the communication has been interrupted
	"detail" parameter specified to confirm that	temporarily due to the STP topology change or the like. If this is the case, wait
	the status of the physical port within the	for a while and check again to see if the physical port is set to "Forwarding." If
		the status of the physical port does not change to "Forwarding" after some time,
	VLAN where the virtual router is set up is
		check the configuration and physical network structure.
	set to "Forwarding."
		• If the physical port is "down," it is not physically connected. Check to see if
		connectors and/or cables are connected correctly.
		If the status of the physical port is "Forwarding," check for the target network for
		the high traffic.
3	Confirm that both remote system and this	Go to No. 4 if multiple virtual routers are set to master.
	system constituting a virtual router are not set
		Go to No. 8 if only one virtual router is set to master.
	to master.
4	Check the communication between the	If the routers constituting the virtual router cannot communicate with each other
	routers constituting the virtual router using	with the actual IPv6 addresses, check the physical network configuration.
	the ping ipv6 command with the actual
		Go to No. 5, if the communication between routers constituting the virtual router
	IPv6 addresses.
		is possible by issuing the ping ipv6 command with the actual IPv6 addresses.

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