Cisco Systems 3750E manual Displaying Dhcp Snooping Information, 22-15

Chapter 22 Configuring DHCP Features and IP Source Guard

Displaying DHCP Snooping Information

	Command	Purpose
Step 3 ip dhcp snooping database timeout		Specify (in seconds) how long to wait for the database transfer process to
	seconds	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.
Step 4 ip dhcp snooping database write-delay		Specify the duration for which the transfer should be delayed after the
	seconds	binding database changes. The range is from 15 to 86400 seconds. The
		default is 300 seconds (5 minutes).
Step 5
	end	Return to privileged EXEC mode.
Step 6
	ip dhcp snooping binding mac-address	(Optional) Add binding entries to the DHCP snooping binding database.
	vlan vlan-id ip-address interface	The vlan-idrange is from 1 to 4904. The seconds range is from 1 to
	interface-id expiry seconds	4294967295.
		Enter this command for each entry that you add.
		Note Use this command when you are testing or debugging the switch.
Step 7
	show ip dhcp snooping database	Display the status and statistics of the DHCP snooping binding database
	[detail]	agent.
Step 8
	copy running-config startup-config	(Optional) Save your entries in the configuration file.

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-delayseconds 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-addressvlan vlan-idip-addressinterface interface-idprivileged 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 22-2:

Table 22-2		Commands for Displaying DHCP Information
	Command		Purpose
	show ip dhcp snooping		Displays the DHCP snooping configuration for a switch
	show ip dhcp snooping binding		Displays only the dynamically configured bindings in the DHCP snooping binding
			database, also referred to as a binding table.
	show ip dhcp snooping database		Displays the DHCP snooping binding database status and statistics.
	show ip dhcp snooping statistics		Displays the DHCP snooping statistics in summary or detail form.
	show ip source binding		Display the dynamically and statically configured bindings.
			Catalyst 3750-E and 3560-E Switch Software Configuration Guide
	OL-9775-02			22-15