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Cisco ME 3400 EthernetAccess Switch SoftwareConfiguration Guide
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Chapter18 Configuring DHCP Features and IP Source Guard
Configuring DHCP Features
Enabling the DHCP Snooping Binding Database Agent
Beginning in privileged EXEC mode, follow these steps to enable and configure the DHCP snoo ping
binding database agent on the switch:
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 delete.
Command Purpose
Step1 configure terminal Enter global configuration mode.
Step2 ip dhcp snooping database
{flash:/filename |
ftp://user:password@host/filename |
http://[[username:password]@]{hostna
me | host-ip}[/directory]
/image-name.tar |
rcp://user@host/filename}|
tftp://host/filename
Specify the URL for the database agent or the binding file by using on e
of these forms:
•flash:/filename
•ftp://user:password@host/filename
•http://[[username:password]@]{hostname | host-ip}[/directory]
/image-name.tar
•rcp://user@host/filename
•tftp://host/filename
Step3 ip dhcp snooping database timeout
seconds Specify when to stop the database transfer process after th e bi nd ing
database changes.
The range is from 0 to 86400. Use 0 for an infinite duration. The defaul t
is 300 seconds (5 minutes).
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.