Communication With Vrrp Configuration In Ipv4 Network Is Disabled - NEC IP8800/S2400 Series Troubleshooting Manual

3.13.2 Communication with VRRP Configuration in IPv4 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 3-61: VRRP Failure Analysis Method
No. Troubleshooting Steps and Command
1 Check the status of the remote systems and
this system constituting a same virtual router
and confirm that one system is used as a
master router and other systems are used as
backup routers.
2 Execute the show vlan command with
"detail" parameter specified to confirm that
the status of the physical port within the
VLAN where the virtual router is set up is set
to "Forwarding."
3 Confirm that both remote system and this
system constituting a virtual router are not set
to master.
4 Confirm that primary virtual router to which
virtual router connect is set by the detail
parameter of the show vrrpstatus
command. [IP8800/S6700] [IP8800/
S6600] [IP8800/S6300]
5 Confirm that VLAN and VRID of the
primary virtual router are the same as ones of
devices connected to the virtual routers.
[IP8800/S6700] [IP8800/S6600]
[IP8800/S6300]
6 Check the communication between the
routers constituting the virtual router using
the ping command with the actual IPv4
addresses.
3.
Troubleshooting Functional Failures in Operation
For the configuration constituting a single virtual router, if one system is master
and the other systems are backup, check the following:
• If terminals are connected under the virtual router without other routers between
them, confirm that the virtual IP address of the virtual router is configured as a
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.
• If the physical port is set to "Blocking," the communication has been interrupted
temporarily due to the STP topology change or the like. If this is the case, wait
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,
check the configuration and physical network structure.
• 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 to see if traffic in the target
network is not high.
Go to No. 4 if multiple virtual routers are set to master. [IP8800/S6700]
[IP8800/S6600] [IP8800/S6300]
Go to No. 6 if multiple virtual routers are set to master. [IP8800/S3600]
Go to No. 10 if multiple virtual routers are not set to master.
If the primary virtual router is configured, go to No.5.
If the primary virtual router is not configured, go to No.6.
If VLAN and VRID of the primary virtual router are different among devices
connected to the virtual routers, multiple of the virtual routers will function as
master. Be sure to adjust the configurations of devices connected to virtual routers.
If VLAN and VRID of the primary virtual router are the same among devices
connected to the virtual routers, go to No.6. Note that you should take those
procedure (No.6 or later) against the primary router.
If the routers constituting the virtual router cannot communicate with each other
with the actual IPv4 addresses, check the physical network configuration.
Go to No. 7, if the communication between routers constituting the virtual router
is possible by issuing the ping command with the actual IPv4 addresses.
Action
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