Troubleshooting guide

3. Troubleshooting Functional Failures During Operation
40
No. Items to check and commands Action
operation command to check the
configuration.
If ip dhcp snooping database url mc is not set, set the ip
dhcp snooping database url mc <saved-file-name>
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
mc.<retry> <reason> has been recorded, the database could not
be saved to the memory card.
If MC file is not inserted. is displayed for <reason>, the
memory card might not be inserted or might not be fully inserted.
If the memory card is not inserted, insert it.
If the memory card is inserted, remove the memory card, and then
insert it again until you hear it clicks. (When inserting the memory
card, do not push it with force or flick it.)
Go to No. 5.
If Can't access to MC by write protection. is displayed
for <reason>, the memory card is write-protected.
Remove the memory card, slide the write-protect switch ( Lock)
in the opposite direction to enable writing to the memory card, and
then insert the memory card into the Switch again. (When
inserting the memory card, do not push it with force or flick it.)
Go to No. 5.
If MC file is not writing. is displayed for <reason>, free
space might be insufficient.
Go to No. 4.
4 Use the show mc operation
command to check the amount of
free space on the memory card.
If the amount of free space is not more than 1 MB, use the del
operation command to delete unnecessary files, and then retry the
operation.
Go to No. 5.
5 Execute the backup operation
command. After the backup process
is complete, execute the show
mc-file operation command.
If the file specified for the ip dhcp snooping database url mc
configuration command exists in addition to the file specified for
the backup operation command, the binding database has been
saved.
If the database has not been saved, the memory card might be
corrupted.
Go to No. 6.
6 Try to execute the format mc
operation command.
When only the prompt without any message is displayed, memory
card formatting has terminated normally.
Take action as described in No. 5.
If Can't gain access to MC is displayed, remove the memory
card and check the memory card and memory card slot for dust.
If there is dust, wipe it off with a dry cloth, and then insert the
memory card into the slot again.
After inserting the memory card, execute the format mc
operation command again.