Problems Related To Saving The Binding Database - Alaxala AX6700S Troubleshooting Manual

3.26.2 Problems related to saving the binding database

If binding information cannot be inherited at a device restart, probable causes are problems
related to saving the binding database. Isolate the cause of the problem according to the
failure analysis method described in the following table.
Table 3-84 Failure analysis method for problems related to saving the binding database
No. Items to check
1 Use the
show mc
to check whether there is a sufficient amount
of unused space in the flash memory or
memory card.
2 Check the storage destination of the binding
database.
3 Execute the
ls mc-dir
whether the directory for saving the database
exists in the memory card.
4 Check the setting of the
database write-delay
command. Also, execute the
snooping binding
last time when the binding database was
saved.
5 Make sure that the lease time of the IP
addresses assigned to the DHCP clients is
longer than the wait time for saving the
database.
6 Other cases
3 Troubleshooting Functional Failures During Operation
or command
show flash
command to check
ip dhcp snooping
configuration
show ip dhcp
command to check the
Action
If there is not a sufficient amount of unused space,
delete unnecessary files to have an enough space.
If there is no problem, go to No. 2.
If the binding database is saved in the flash memory,
go to No. 4.
If the binding database is saved in a memory card, go
to No. 3.
If the directory does not exist, use the
command to create the directory.
If there is no problem, go to No. 4.
Even if the binding information is updated, the binding
database is not saved until the specified time passes.
After an IP address is assigned, wait a while until the
specified time passes, and then make sure that the last
time when the binding database was saved is updated.
If there is no problem, go to No. 5.
If the lease time is shorter, the lease of the IP
addresses might expire before the binding database is
completely read in.
Use the
ip dhcp snooping database
configuration command to shorten the
write-delay
wait time for saving the database on the Switch.
Alternatively, on the DHCP server, extend the lease
time of the IP addresses.
If there is no problem, go to No. 6.
If there is no problem when the binding database is
saved in the flash memory, but the binding information
cannot be inherited when the database is saved in a
memory card, replace the memory card.
Note that if you are planning long-term operation, save
the binding database in a memory card.
mkdir
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