Troubleshooting guide

3. Troubleshooting Functional Failures During Operation
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Table 3-68: Failure analysis method when state switching fails in a GSRP configuration
In a GSRP configuration, if a reception timeout for GSRP Advertise frames is detected and a
neighbor unknown state occurs, isolate the cause of the problem according to the failure analysis
method described in the following table.
Table 3-69: Failure analysis method when a neighbor unknown state occurs in a GSRP
configuration
No. Items to check and commands Action
1Use the
show gsrp command to check
the status of the VLAN group in which
intended switching between master and
backup states does not occur.
If the state of one of them is
Master and the state of the other is other
than Master, go to No. 2.
If the state of one of them is
Backup(No Neighbor), resolve the
communication problem in the direct link. If necessary, also use the
set
gsrp master command for the one whose state is Backup(No
Neighbor) to change the state to Master.
If the state of both of them is either
Backup or Backup(Waiting), make
sure that the method for selecting the master or backup state
(
Selection-Pattern) is the same between the devices.
If the state of both of them is
Backup(Lock), cancel the lock state of one
or both of them.
If the state of both of them is
Master, use the restart gsrp command
to restart the GSRP program on one of them.
For other cases, the devices are temporarily undergoing a status
transition. Wait a while.
2 Execute the
show gsrp and show gsrp
<GSRP-ID> vlan-group <VLAN
group ID list> commands. Based on the
information displayed by the
commands, make sure that the master
and backup states are correctly selected.
The information includes the method
for selecting the master or backup state
(
Selection-Pattern), the number of
active ports on the Switch and on the
partner device (
Active-Ports), the
priority information (
Priority), and
the MAC addresses.
If the selected states are correct but the number of active ports (
Active
Ports) does not match the number of up ports (Up Ports), go to No. 3.
If the selected states are not correct, use the
restart gsrp command to
restart the GSRP program on the Switch.
3Use the
show gsrp detail and show
gsrp <GSRP-ID> port <Port list>
commands to check the delay time
before up ports are counted for the
number of active ports
(
port-up-delay) and also the
remaining delay time (delay).
If the delay time (
port-up-delay) is infinity and you want to
include the number of up ports (
UP Ports) in the number of active ports
(
Active Ports), execute the clear gsrp port-up-delay command.
If the delay time (port-up-delay) is not infinity and the remaining
delay time (
delay) is not zero, wait a while. The up ports are counted as
active ports after the remaining delay time passes. If you want to count
the up ports as active ports immediately, execute the
clear gsrp
port-up-delay command.
No. Items to check and commands Action
1Use the
show gsrp detail command
to check the sending interval
(
Advertise Interval) and retention
time (Advertise Hold Time) of GSRP
Advertise frames.
If the retention time of GSRP Advertise frames is smaller than or equal
to the sending interval of GSRP Advertise frames, set the retention time
to a value larger than the sending interval.
If the retention time of GSRP Advertise frames is larger than the sending
interval of GSRP Advertise frames, set the retention time to a value
larger than the current value depending on the network environment.