Adc SG-1 Manual do Utilizador descarregar pdf (Página 128)

Chapter 7: Second Level Commands June 30, 2006

7-48 SG1-UM-8500-03

DHCP COMMANDS

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.

Using the ip dhcp relay server command

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)

Table 7-11. ip dhcp relay server parameters

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 “Using the ip dhcp relay server command”.

Host(config)# ip dhcp relay server

Parameter Description Legal values/range

<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

Host(config)# no ip dhcp relay server

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