Troubleshooting guide

3. Troubleshooting Functional Failures During Operation
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The second time you execute the
dump policy command, the memory dump file you
collected the first time is deleted, so be sure to save the memory dump file you collected
before executing the command for the second time.
3.28.2 Actions to be taken when the tracking functionality of policy-based
routing is in an unexpected track state
The Switch might have an unexpected track state for one of the following three reasons:
1. The track configuration was changed.
2. Due to a network failure, communication cannot be made with the polling monitoring track
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 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 are in the
Up status, go to No. 5.
5 Check the path switch-back operation setting of
policy-based routing
• Execute the
show ip cache policy
command, and check the
Recover item.
If the setting is Off, path switch-back operations are not
performed, and thus the path is not being re-selected.
Execute the
reset policy-list command to re-select
the path.
If the setting is
On, go to No. 6.
6 Check the ARP information of the policy-based
routing forwarding destination
• Execute the
show ip arp command, and
check if the next hop of the forwarding
destination is registered.
• Execute the show mac-address-table
command, and check if the MAC address of
the forwarding destination is registered.
If ARP is not registered, specify static ARP. If the MAC
address is not registered, specify a MAC address static
entry. Also, use the tracking functionality of policy-based
routing.
If ARP is registered, go to No. 7.
7 Check if a network communication failure has
occurred on the destination interface
• See 3.7 IPv4 network communication
failures.
If a communication failure has occurred, follow the
instructions in the referenced section.
If a communication failure has not occurred, go to No. 8.
8 Collect analysis information
• Execute the
show tech-support command
and the dump policy command, twice in that
order.
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Send the information you collected to the support center.
No. Items to check and commands Action