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3. Troubleshooting Functional Failures in Operation
106
7 Execute the show logging command and
the show vrrpstatus command with
"statistics" parameter specified to check the
receiving status of the ADVERTISEMENT
packets.
• If "Virtual router <VRID> of <Interface Name> received VRRP packet for
which the advertisement interval is different than the one configured for local
virtual router." is registered in the type log and "<Number of packets> with bad
advertisement interval" of statistics is incremented, confirm that set values of
the ADVERTISEMENT packet sending interval match between this system and
the remote system.
• If "Virtual router <VRID> of <Interface Name> received VRRP packet for
which the advertisement interval is different than the one configured for local
virtual router." is registered in the type log and "<Number of packets> with bad
advertisement interval" of statistics is incremented, confirm that set values of
the ADVERTISEMENT packet sending interval match between this system and
the remote system.
• If "Virtual router <VRID> of <Interface Name> received VRRP packet with IP
TTL not equal to 255." is registered in the type log and "<Number of packets>
with bad ip ttl" of statistics is incremented, confirm that there is no other router
between this system and the remote system.
• If "Virtual router <VRID> of <Interface Name> received VRRP packet for
which the address list does not match the locally configured list for the virtual
router." is registered in the type log and "<Number of packets> with bad ip
address list" of statistics in incremented, confirm that settings of the virtual IP
address are same.
• If "Virtual router <VRID> of <Interface Name> received VRRP packet that
does not pass the authentication check." is registered in the type log and
"<Number of packets> with bad authentication type" of statistics is
incremented, check to see that the authentication password has been set on this
system and the remote system.
• If "VRRP packet received with unsupported version number." is shown in the
type log and statistics information "<Number of packets> with invalid type" is
incremented, confirm that the VRRP mode between this system and remote
system is same.
If the ADVERTISEMENT packet is normally received, check the remote system.
Go to No. 8 if the ADVERTISEMENT packet is not received.
8 Check the statistical information of the
physical port to which the remote system
constituting the same virtual router is
connected using the show interfaces
command.
Also, check the CPU usage using the show
cpu command.
If "Input rate" and "Output rate" are excessive on the physical port to which the
remote system is connected and the line traffic is high or the CPU usage checked
by the show cpu command is high, take the following actions:
• If the line loops, review the use of STP or physical network configuration to
eliminate the loop.
• Execute configuration command vrrp timers advertise to set up rather
long sending intervals for sending the ADVERTISEMENT packets.
•
Execute configuration command vrrp preempt delay to set the automatic
switchback suppressing time.
Go to No. 9 if the traffic of the physical port is low.
9 Confirm that discarding ADVERTISEMENT
packets is not set in the filter setting.
If such filtering setting exists, change the filtering setting so that the
ADVERTISEMENT packets are not discarded.
If this is not the case, check for the operation of the remote system constituting the
same virtual router.
10 If a failure monitoring interface has been set
up, check for its status.
If another virtual router is defined on the interface on which a failure monitoring
interface is set up, confirm that the failure monitoring interface of that virtual
router is not the interface of this virtual router. Otherwise, delete the setting on one
of the failure interface.
Go to No. 11 if the failure monitoring interface described above is not set up.
No. Troubleshooting Steps and Command Action