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Cisco Catalyst Blade Switch 3130 for Dell Software Configuration Guide
OL-13270-01
Chapter21 Configuring DHCP Feat ures and IP Source Guard Displaying DHCP Snooping Information
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 sno oping
database statistics privileged EXEC command. To renew the datab ase, use th e 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 com ma nds i n
Table21-2:
Step3 ip dhcp snooping database timeout
seconds 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.
Step4 ip dhcp snooping database write-delay
seconds Specify the duration for which the transfer should be d ela yed a f ter the
binding database changes. The range is from 15 to 86400 seconds. The
default is 300 seconds (5 minutes).
Step5 end Return to privileged EXEC mode.
Step6 ip dhcp snooping binding mac-address
vlan vlan-id ip-address interface
interface-id expiry seconds
(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 Use this command when you are testing or debugging the switch .
Step7 show ip dhcp snooping database
[detail]Display the status and statistics of the DHCP snooping binding database
agent.
Step8 copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose
Table21-2 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 a nd stati stics.
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.