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3. Troubleshooting Functional Failures in Operation
103
3.13 Communication Failure on High-reliability Function
3.13.1 GSRP Communication Failures
If the communication is not possible in the GSRP configuration, isolate the problem according to the failure analysis
method shown in the table below.
Table 3-58: Analysis Method for Communication Failure in GSRP Configuration
If master/backup is not switched as expected in the GSRP configuration, isolate the problem using the failure analysis
method shown in the table below.
No. Troubleshooting Steps and Command Action
1 On this system and remote system
constituting a GSRP group, check the status
of the VLAN group to which the failed
VLAN belongs using the show gsrp
command.
Go to No. 2 if one system is master and the other system is non-master.
If either system is Backup (No Neighbor), recover from the communication failure
between direct links. GSRP Advertise frames may have been discarded by
filtering, or GSRP Advertise frames may have been discarded through bandwidth
monitoring, discarding control, or shaper of the QoS control.
See "3.23.1 Checking Filtering/QoS Setting Information" to check for it.
If necessary, change the system that is Backup (No Neighbor) to Master using the
set gsrp master command.
If both systems are Backup or Backup (Waiting), check to see if the master/backup
selection method (Selection-Pattern) is the same between the systems.
If both systems are Backup (Lock), reset the lock status of either or both systems.
If both systems are Master, restart either GSRP program using the restart
gsrp command.
In other cases, temporary status transition is in progress. Wait for a while for the
communication to recover.
2 Check the status of the VLAN port on this
system and systems on the communication
path.
Restore the failed VLAN port on this system or systems on the communication
path.
If the conditions below are all met, activate the VLAN port using the activate
command.
• The MAC address table flash method for the current VLAN port is "Reset"
(determine by using the show gsrp command with "port" parameter
specified).
Go to No. 3 if there is no failure on the VLAN port of this system or systems on
the communication path.
3 Check the MAC address table flash method
(GSRP/Reset/No) to the VLAN port on this
system using the show gsrp command
with "port" parameter specified.
If the MAC address table flash method is either GSRP or Reset and does not match
the configuration, correct it using configuration command gsrp
reset-flash-port and gsrp no-flash-port.
If the MAC address table flash method is either GSRP or Reset and matches the
configuration, restart the GSRP program on this system with the restart gsrp
command.
If the MAC address table flash method is No, wait for aging of MAC address table
on the neighboring system on the communication path.