4000 Router Series Layer 3 - IP Services Configuration Guide

Setting the DSCP value for DHCP packets sent by

the DHCP relay agent

The DSCP value of a packet specifies the priority level of the packet and affects the transmission priority

of the packet.

To set the DSCP value for DHCP packets sent by the DHCP relay agent:

Ste

Command

Remarks

1. Enter system view.

system-view N/A

2. Set the DSCP value for DHCP

packets sent by the DHCP relay

agent.

dhcp dscp dscp-value

By default, the DSCP value in DHCP packets

sent by the DHCP relay agent is 56.

Displaying and maintaining the DHCP relay agent

Execute display commands in any view and reset commands in user view.

Task Command

Display information about DHCP servers specified

on the DHCP relay agent interface.

display dhcp relay server-address [ interface

interface-type interface-number ]

Display Option 82 configuration information on the

DHCP relay agent.

display dhcp relay information [ interface interface-type

interface-number ]

Display relay entries on the DHCP relay agent.

display dhcp relay client-information [ interface

interface-type interface-number | ip ip-address

[ vpn-instance vpn-instance-name ] ]

Display packet statistics on the DHCP relay agent.

display dhcp relay statistics [ interface interface-type

interface-number ]

Clear relay entries on the DHCP relay agent.

reset dhcp relay client-information [ interface

interface-type interface-number | ip ip-address

[ vpn-instance vpn-instance-name ] ]

Clear packet statistics on the DHCP relay agent.

reset dhcp relay statistics [ interface interface-type

interface-number ]

DHCP relay agent configuration examples

DHCP relay agent configuration example

Network requirements

As shown in Figure 22, configure the DHCP relay agent on Router A so that DHCP clients can obtain IP

addresses and configuration parameters from the DHCP server on another subnet.