ADC SG-1 Manuel D’Utilisation

7-48

Dynamic Host Configuration Protocol (DHCP) is a communications protocol that lets network administrators manage 
centrally and automate the assignment of Internet Protocol (IP) addresses in an organization's network. Using the 
Internet Protocol, each machine that can connect to the Internet needs a unique IP address. When an organization 
sets up its computer users with a connection to the Internet, an IP address must be assigned to each machine. 
Without DHCP, the IP address must be entered manually at each computer and, if computers move to another 
location in another part of the network, a new IP address must be entered. DHCP lets a network administrator 
supervise and distribute IP addresses from a central point and automatically sends a new IP address when a 
computer is plugged into a different place in the network.

The SG-1 enables in this feature the DHCP relay capabilities. It acts as a DHCP relay agent and forwards the DHCP 
request to a DHCP server, which handles the IP-addresses allocation for the connected peers.

Use this command to define the DHCP relay server.

Usage

ip dhcp relay server <Ethernet | VLAN | ATM | default> <slot>\<port number>\[<sub-

interface number>] <priority> <ip address>

Parameter(s)

Example(s)

Using the no ip dhcp relay server command

Use this command to define DHCP relay servers.

Usage

ip dhcp relay server <Ethernet | VLAN | ATM | default> <slot>\<port number>\[<sub-

interface number>] <priority>

For parameters and examples, see 

.

<port number>

Physical port number.

1 - 2

<sub-interface number>

Sub interface number.

1- 4095

<priority>

DHCP server priority.

1- 10

<ip address>

IP address of the DHCP relay 
server.

IP address

Host(config)# ip dhcp relay server Ethernet 0 \ 1 7 12.1.44.55

Host(config)# ip dhcp relay server Atm 2 \ 1 \ 54 5 12.33.54.1

Host(config)# ip dhcp relay server VLAN 1 \ 2 32 4 1.3.2.4