Troubleshooting guide

3. Troubleshooting Functional Failures During Operation
39
No. Items to check and commands Action
3 Check the status of the ST1 LED
on the front of the switch, and
then use the show logging
operation command to check the
operation log for saving of the
binding database.
If the ST1 LED is blinking red and It was not able to store
binding database in flash. has been recorded, use the
following procedure to change the save location to a memory card
(MC).
1. Use the ip dhcp snooping database url configuration
command to change the save location to the memory card.
2. Use the save command to save the configuration.
3. Insert the memory card into the switch.
4. Restart the switch.
5. Set internal flash memory as the save location again.
6. Use the save command to save the configuration.
7. Restart the switch.
Go to No. 4.
4 After the restart, check the status
of the ST1 LED on the front of the
switch, and then use the show
logging operation command to
check the operation log for
saving the binding database.
If the status is the same as in No. 3, internal flash memory might be
corrupted. Use the following procedure to replace the switch.
1. Execute the backup operation command.
(At this time, the file specified for the backup operation
command and the file specified for the ip dhcp snooping
database url mc configuration command used in No. 3 will
have been saved to the memory card.)
2. Replace the switch.
3. Insert the memory card into the new switch.
4. Execute the restore operation command. (The data is
restored to the switch from the backup created by the backup
operation command.)
5. Use the ip dhcp snooping database url configuration
command to change the save location to the memory card.
6. Use the save command to save the configuration.
7. Restarts the switch. The binding database on the memory card
is restored.
#
For details about save events and the wait-to-write time, see the Configuration Guide
Vol. 1.
(b) The database cannot be saved to a memory card
Table 3-20 When the save location for the binding database is a memory card
No. Items to check and commands Action
1 Use the show ip dhcp snooping
binding operation command to
check the time that the database
was saved.
If a hyphen (-) is displayed for Agent URL, go to No. 2.
Saving data might not have started yet because the wait-to-write
time
#
defined in the configuration has not elapsed since the save
event
#
. Wait a while.
If the wait-to-write time
#
since the save event
#
has elapsed, and
the value displayed for Last succeeded time is either a hyphen
(-) or a time earlier than the time that the save event occurred, go
to No. 3.
2 Use the show running-config
If ip dhcp snooping database url mc is set, go to No. 3.