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

No.
8 Make sure the DHCP server is connected to a
trusted port.
9 Use the
show ip dhcp snooping binding
command to check the binding information.
10 Other cases

3.27.2 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 3-85: Failure analysis method for problems related to saving the binding database
No.
1 Use the
show mc
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
time when the binding database was saved.
Items to check
Items to check
or command to
show flash
command to check
ip dhcp snooping
configuration
show ip dhcp
command to check the last
3. Troubleshooting Functional Failures During Operation
Action
DHCP server response packets from an untrusted port are
discarded.
If the target DHCP server is an authorized one, set the
configuration command for the
dhcp snooping trust
port to which the DHCP server is connected.
Note that if the DHCP server on the Switch is used, the port
can be an untrusted port. If the DHCP relay on the Switch is
used, the DHCP server must be connected to a VLAN
exempt from DHCP snooping or to a trusted port.
If the IP address cannot be updated after the device restarts,
check the save status of the binding database.
See 3.27.2 Problems related to saving the binding
database.
You might find that a different port or VLAN ID is
displayed in the binding information for a target entry (that
has the target MAC address and target IP address). In this
case, the connection port or the VLAN capacity limit might
have been changed after assignment of an IP address.
To continue using the current port or VLAN, obtain an IP
address again.
If any of the above actions do not resolve your problem,
check other functionality used in the device according to
this manual.
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
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 distributed, 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.
ip
command to
mkdir
157