3Com 8807 - Page 701

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Configuring DHCP Relay 701

DHCP Relay

Configuration Example

Network requirements

As shown in Figure 163, two DHCP clients located at the same network segment

(10.110.0.0) are connected to a switch through a port in VLAN 2. The switch,

acting as a DHCP relay, is supposed to forward DHCP packets between the two

DHCP clients and the DHCP server with the IP address of 202.38.1.2.

Network diagram

Figure 163 Network diagram for DHCP Relay

Configuration procedure

# Enter system view.

<SW8800>system-view

# Create VLAN 2.

[SW8800]vlan 2

# Create Vlan-interface 2 and enter VLAN interface view.

[SW8800]interface Vlan-interface 2

# Assign an IP address to Vlan-interface 2.

[3Com-Vlan-interface2]ip address 10.110.1.1 255.255.0.0

# Specify to forward DHCP packets to a remote DHCP server.

[3Com-Vlan-interface2]dhcp select relay

# Configure the IP address of the DHCP server to which VLAN 2 sends DHCP

packets.

Enable debugging for DHCP Relay

debugging dhcp relay { all| packet | error |

event }

Disable debugging for DHCP Relay

undo debugging dhcp relay { all| packet |

error | event }

Table 653 Display and debug DHCP Relay

Operation Command

Ethernet

Ethe r ne t

Internet

DHCP client

Sw itc h ( DHCP Relay )

10.110.0.0

DHCP Ser v e

202.38.1.2

10.110.1.1

202.38.0.0

202.38.1.1