DHCP relay agent information

Viewing information about DHCP option 82 processing

Use the commands in this section to view information about DHCP option 82 processing.

Viewing the circuit ID, remote ID, and forwarding policy

Use the show ip dhcp relay information command to obtain information about the circuit ID, remote ID, and forwarding policy for DHCP option 82. The following shows an example output.

Brocade# show ip dhcp relay information

Relay Information: Format: Circuit-ID : vlan-mod-port

Remote-ID : mac

Policy : keep

Syntax: show ip dhcp relay information

TABLE 72

Output for the ip dhcp relay information command

 

 

Field

Description

 

 

Circuit-ID

The agent circuit ID format:

 

vlan-mod-port– The default circuit ID format.

 

 

Remote-ID

The remote ID format. This field displays mac, which is the default

 

remote ID format.

 

 

Policy

How the Brocade switch processes relay agent information it receives in

 

DHCP messages:

 

drop – drops the relay agent information

 

keep – keeps the relay agent information

 

replace – replaces the relay agent information with its own

 

 

Viewing the ports on which DHCP option 82 is disabled

Use the following command to refer which port in a DHCP snooping VLAN has DHCP Option 82 disabled.

Brocade# show ip dhcp snooping vlan 1

IP DHCP snooping VLAN 1: Enabled

Trusted Ports : ethe 1/1/3

Untrusted Ports : ethe 1/1/1 to 1/1/2 ethe 1/1/4 to 1/1/24

Relay Info. disabled Ports: ethe 1/1/10

Syntax: show ip dhcp snooping vlan vlan-id

TABLE 73 Output for the show ip dhcp snooping vlan command

Field

Description

 

 

IP DHCP snooping VLAN vlan-id

The DHCP snooping and DHCP option 82 status for a VLAN:

 

Enabled

 

Disabled

 

 

Trusted Ports

A list of trusted ports in the VLAN.

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Brocade Communications Systems 6650 manual Viewing information about Dhcp option 82 processing