Displaying Dhcp Snooping Information - Cisco Catalyst 3120 Software Manual

Chapter 21 Configuring DHCP Features and IP Source Guard
Command
Step 3 ip dhcp snooping database timeout
seconds
Step 4
ip dhcp snooping database write-delay
seconds
Step 5
end
Step 6
ip dhcp snooping binding mac-address
vlan vlan-id ip-address interface
interface-id expiry seconds
Step 7 show ip dhcp snooping database
[detail]
Step 8 copy running-config startup-config
To stop using the database agent and binding files, use the no ip dhcp snooping database global
configuration command. To reset the timeout or delay values, use the ip dhcp snooping database
timeout seconds or the ip dhcp snooping database write-delay seconds global configuration
command.
To clear the statistics of the DHCP snooping binding database agent, use the clear ip dhcp snooping
database statistics privileged EXEC command. To renew the database, use the renew ip dhcp snooping
database privileged EXEC command.
To delete binding entries from the DHCP snooping binding database, use the no ip dhcp snooping
binding mac-address vlan vlan-id ip-address interface interface-id privileged EXEC command. Enter
this command for each entry that you want to delete.

Displaying DHCP Snooping Information

To display the DHCP snooping information, use one or more of the privileged EXEC commands in
Table
Table 21-2 Commands for Displaying DHCP Information
Command
show ip dhcp snooping
show ip dhcp snooping binding
show ip dhcp snooping database
show ip dhcp snooping statistics
show ip source binding
OL-12247-01
Purpose
Specify (in seconds) how long to wait for the database transfer process to
finish before stopping the process.
The default is 300 seconds. The range is 0 to 86400. Use 0 to define an
infinite duration, which means to continue trying the transfer indefinitely.
Specify the duration for which the transfer should be delayed after the
binding database changes. The range is from 15 to 86400 seconds. The
default is 300 seconds (5 minutes).
Return to privileged EXEC mode.
(Optional) Add binding entries to the DHCP snooping binding database.
The vlan-id range is from 1 to 4904. The seconds range is from 1 to
4294967295.
Enter this command for each entry that you add.
Note
Display the status and statistics of the DHCP snooping binding database
agent.
(Optional) Save your entries in the configuration file.
21-2:
Purpose
Displays the DHCP snooping configuration for a switch
Displays only the dynamically configured bindings in the DHCP snooping binding
database, also referred to as a binding table.
Displays the DHCP snooping binding database status and statistics.
Displays the DHCP snooping statistics in summary or detail form.
Display the dynamically and statically configured bindings.
Use this command when you are testing or debugging the switch.
Cisco Catalyst Blade Switch 3120 for HP Software Configuration Guide
Displaying DHCP Snooping Information
21-15