3Com 3C13636 Configuration Manual page 495

3Com Router 3000 Ethernet Family
Configuration Guide
[server1] dhcp server ip-pool 1
[server1-dhcp1] network 200.254.0.0 mask 255.255.0.0
# Configure server2
[server2] dhcp enable
[server2] interface ethernet0/0/0
[server2-Ethernet0/0/0] ip address 172.10.0.1 16
[server2] dhcp server ip-pool 2
[server2-dhcp2] network 172.10.0.0 mask 255.255.0.0
# Configure Ethernet0/0/0 getting dynamic IP address though DHCP
[client] interface ethernet0/0/0
[client-Ethernet0/0/0] ip address dhcp-alloc
# Configure Ethernet2/0/0 getting dynamic IP address through DHCP
[client] interface ethernet2/0/0
[client-Ethernet2/0/0] ip address dhcp-alloc
II. Ethernet sub-interface as DHCP client
1) Network requirements
DHCP servers 1 and 2 are respectively in VLAN10 and VLAN20. The configuration task
is to create sub-interfaces and configure getting dynamic IP addresses respectively
from the two DHCP servers.
2) Networking diagram
DHCP Server1
DHCP Server2
Figure 9-9 Sub-interface as DHCP client
3) Configuration procedures
Configure LAN Switch first (it is not detailed here) and make sure that DHCP servers
1and 2 can be respectively connected into VLAN10 and VLAN 20. Then configure RTA
interface as Trunk interface which enables transparent transmission of messages for
VLAN 10 and VLAN 20.
The configurations of DHCP server1 and server2 are similar to those in above example,
so the configurations of DHCP client are listed.
# Configure the sub-interface which gets IP address from DHCP server1.
[client] interface ethernet0/0/0.1
Eth0/0/0
Eth0/0/0
LSW
Eth0/0/0
3Com Corporation
RTA(DHCP Client)
9-48
Chapter 9 DHCP Configuration