Troubleshooting guide

3. Troubleshooting Functional Failures During Operation
165
3.29 Policy-based switching problems
3.29.1 Actions to be taken when packets are not forwarded in policy-based
switching
When you are using a policy-based switching group, if packets are not forwarded to the specified
route, resolve the problem as shown in the following table.
Table 3-92: Action to take when packets are not forwarded in policy-based switching
No. Items to check and commands Action
1 Check the operating status of the filter for which
policy-based switching list information is set
• Execute the
show access-filter
command, and in
matched packets :
check whether the number of packets matches
the filter conditions.
If the number of packets that could not be transmitted
differs from the
matched packets value, it is possible that
the filter detection conditions are incorrect, causing implicit
discards.
Revise the filter settings.
If the number of packets that could not be transmitted is the
same as the
matched packets value, go to No. 2.
2 Check the operating status of groups in
policy-based switching
• Execute the
show cache policy-switch
command, and check the display status of *>.
If the status is not displayed, the group might be in the
process of starting, in the process of switching, or in default
operation.
To check if the group is in the process of starting, go to No.
3.
To check if the group is in the process of switching, go to
No. 4.
To check if the group is in default operation, go to No. 5.
If the status is displayed, go to No. 5.
3 Check the operating status of path switching in
policy-based switching
• Check the
Start Time and End Time values
of the
Policy Base Switching Default
Init Interval
of the show cache
policy-switch
command.
If
- is displayed for End Time only, the packets might have
been discarded because the group is in the process of
starting. Wait until startup finishes.
If
Start Time and End Time are both -, or the date is
displayed, go to No. 5.
4 Check the operating status of path switching in
policy-based switching
• Check the
Start Time and End Time values
of the
Policy Base Switching Default
Aging Interval
of the show cache
policy-switch
command.
If
- is displayed for End Time only, the packets might have
been discarded because the group is in the process of path
switching. Wait until path switching finishes.
If
Start Time and End Time are both -, or the date is
displayed, go to No. 5.
5 Check the status of the policy-based switching
forwarding destination port, the channel group
status, and the tracking functionality
• Execute the
show port command, and check
the track state of the Status item.
• Execute the
show channel-group
command, and check the CH Status item.
• Execute the
show track-object command,
and check the State item.
If any of the following is not
Up, forwarding and discarding
follow default operation: the policy-based switching
forwarding destination port, the channel group status, or the
tracking functionality status. Make sure that the forwarding
destination port, the channel group status, and the tracking
functionality statuses are all
Up.
If both are in the
Up status, go to No. 6.