Troubleshooting guide

3. Troubleshooting Functional Failures During Operation
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If VLANs and VRIDs for the primary virtual router are the same among
devices that make up the virtual routers, go to No. 6.
Note that items No. 6 onward must be applied to the primary virtual
router.
6 Check communication between routers
that make up the virtual router by using
the
ping command with actual IPv4
addresses.
If communication with actual IPv4 addresses is not possible between
routers that make up the virtual router, check the physical network
configuration.
If the result of the
ping command indicates that communication with
actual IPv4 addresses is possible between routers that make up the virtual
router, go to No. 7.
7Use the
show logging command and
the
show vrrpstatus command with
the
statistics parameter to check the
reception status of ADVERTISEMENT
packets.
• You might find that the following is registered in the reference log:
Virtual router <VRID> of <Interface Name> received VRRP
packet for which the advertisement interval is
different than the one configured for local virtual
router. In this case, if the value of <Number of packets> with bad
advertisement interval increases in the statistics, check
whether the setting value of the ADVERTISEMENT packet-sending
interval matches between the Switch and remote device.
• You might find that the following is registered in the reference log:
Virtual router <VRID> of <Interface Name> received VRRP
packet that does not pass the authentication check. In
this case, if the value of <Number of packets> with
authentication failed increases in the statistics, check whether
the authentication password setting matches between the Switch and
remote device.
• You might find that the following is registered in the reference log:
Virtual router <VRID> of <Interface Name> received VRRP
packet with IP TTL not equal to 255. In this case, if the value
of <Number of packets>
with bad ip ttl increases in the statistics,
make sure that there is no other router between the Switch and
remote device.
• You might find that the following is registered in the reference log:
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. In this
case, if the value of <Number of packets>
with bad ip address
list increases in the statistics, make sure that the virtual IP address
setting is the same between the Switch and remote device.
• You might find that the following is registered in the reference log:
Virtual router <VRID> of <Interface Name> received VRRP
packet that does not pass the authentication check. In
this case, if the value of <Number of packets>
with bad
authentication type increases in the statistics, check whether the
authentication password setting exists in the Switch and remote
device.
• You might find that the following is registered in the reference log:
Virtual router <VRID> of <Interface Name> received VRRP
packet that length less than the length of the VRRP
header. In this case, if the value of <Number of packets> with
packet length error increases in the statistics, make sure that the
VRRP operation mode setting is the same between the Switch and
remote device.
• You might find that the following is registered in the reference log:
VRRP packet received with unsupported version number. In
this case, if the value of <Number of packets>
with invalid type
increases in the statistics, make sure that the VRRP operation mode
setting is the same between the Switch and remote device.
No. Items to check and commands Action