Alaxala AX2500S, Troubleshooting Manual

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3 Troubleshooting Functional Failures During Operation
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(2) When the binding database cannot be saved
If the binding database cannot be saved when the DHCP snooping functionality is used,
take action according to the tables below.
(a) The database cannot be saved to internal flash memory
Table 3-15 When the save location for the binding database is internal flash memory
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
#
has elapsed since the save event
#
, and if
the time displayed for
Last Succeeded time
is one of the
following, go to No. 3:
- Hyphen (-)
-
Time before the save event
#
2 Use the
show running-config
operation command to check the
configuration.
If
ip dhcp snooping database url flash
is set, go to No. 3.
If
ip dhcp snooping database url flash
is not set, set the
ip dhcp snooping database url flash
configuration
command.
3
Use the show logging operation
command to check the operation log
for saving the binding database.
If 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 restarting the Switch, 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. Restart the Switch. The binding database on the memory
card is restored.