Option 28-Supported Dhcp Relay Configuration Example - 3Com 3C13636 Configuration Manual

3Com Router 3000 Ethernet Family
Configuration Guide
III. Configuration procedure
1) Configure the DHCP client (on 3Com VCX)
Enable DHCP client, and configure it to request all suboptions of option 184 when
requesting an address.
2) Configure the DHCP server
<3Com> system-view
[3Com] dhcp enable
[3Com] dhcp select global interface ethernet 1/0/0
[3Com] dhcp server ip-pool 123
[3Com-dhcp-pool-123] network 10.1.1.1 mask 255.255.255.0
[3Com-dhcp-pool-123] voice-config as-ip 2.2.2.2
[3Com-dhcp-pool-123] voice-config ncp-ip 3.3.3.3
[3Com-dhcp-pool-123] voice-config voice-vlan 1 enable
[3Com-dhcp-pool-123] voice-config fail-over 1.1.1.1 99*
[3Com-dhcp-pool-voice] quit

9.9.6 Option 28-Supported DHCP Relay Configuration Example

I. Network requirements
As shown in Figure 9-12, two DHCP clients on 10.110.1.0 obtain IP addresses from a
DHCP server through a DHCP relay.
Do the following on the DHCP relay:
Configure option 82 support
Use the keep strategy to handle DHCP requests with option 82.
II. Network diagram
DHCP Client
Ethernet1/0/0
10.110.1.1/24
Figure 9-12 Network diagram for option 82 support on DHCP relay
DHCP Client
10.110.1.0/24
Ethernet
IP
Network
DHCP Relay
3Com Corporation
DHCP Server
202.38.1.2/16
Ethernet
202.38.0.0
9-51
Chapter 9 DHCP Configuration