Drop Dhcp Packets On Snooped Vlans Only - Dell C9000 Series Networking Configuration Manual

Hide thumbs Also See for C9000 Series:

Table of Contents

Clearing the Binding Table

To clear the binding table, use the following command.

Delete all of the entries in the binding table.

EXEC Privilege mode

clear ip dhcp snooping binding

Displaying the Contents of the Binding Table

To display the contents of the binding table, use the following command.

Display the contents of the binding table.

EXEC Privilege mode

show ip dhcp snooping

Example of the show ip dhcp snooping Command

View the DHCP snooping statistics with the show ip dhcp snooping command.

Dell#show ip dhcp snooping

IP DHCP Snooping

IP DHCP Snooping Mac Verification

IP DHCP Relay Information-option

IP DHCP Relay Trust Downstream

Database write-delay (In minutes)

DHCP packets information

Relay Information-option packets

Relay Trust downstream packets

Snooping packets

Packets received on snooping disabled L3 Ports

Snooping packets processed on L2 vlans

DHCP Binding File Details

Invalid File

Invalid Binding Entry

Binding Entry lease expired

List of Trust Ports

List of DHCP Snooping Enabled Vlans

List of DAI Trust ports

Drop DHCP Packets on Snooped VLANs Only

Binding table entries are deleted when a lease expires or the relay agent encounters a DHCPRELEASE.

Line cards maintain a list of snooped VLANs. When the binding table fills, DHCP packets are dropped only on

snooped VLANs, while such packets are forwarded across non-snooped VLANs. Because DHCP packets are

dropped, no new IP address assignments are made. However, DHCP release and decline packets are allowed

Dynamic Host Configuration Protocol (DHCP)