Troubleshooting guide

3. Troubleshooting Functional Failures During Operation
160
3.28 Policy-based routing problems
3.28.1 Actions to take when packets are not forwarded in policy-based
routing
If packets are not forwarded to the specified route when a policy-based routing group is used,
resolve the problem as shown in the following table.
Table 3-88: Action to take when packets are not forwarded in policy-based routing for
AX6700S, AX6600S, or AX6300S
No. Items to check and commands Action
1 Check the operating status of the filter for which
the policy-based routing list information is set
• Execute the
show access-filter
command, and in
matched packets :,
check whether the number of packets matches
the filter condition.
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 the policy-based
routing group
• Execute the
show ip cache policy
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 routing
• Check the
Start Time and End Time values
of the
Policy Base Routing Default
Init Interval
of the show ip cache
policy
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 routing
• Check the
Start Time and End Time values
of the
Policy Base Routing Default
Aging Interval
of the show ip cache
policy
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 VLAN interface and
tracking functionality of the policy-based routing
forwarding destination
• Execute the
show vlan command, and check
the Status: item.
• Execute the
show track-object command,
and check the track state of the State item.
If the status of either the VLAN interface or the tracking
functionality of the policy-based routing forwarding
destination is not
Up, packets are being forwarded normally
or discarded due to default operation. Make sure the VLAN
interface and tracking functionality of the forwarding
destination are both in the
Up status.
If both the VLAN interface and tracking functionality are in
the
Up status, go to No. 6.