Avaya BCM 4.0 Networking Guia de Configuração descarregar pdf (Página 589)

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BCM 4.0 Networking Configuration Guide

Chapter 65

Configuring DHCP

BCM provides DHCP (Dynamic Host Configuration Protocol) service to branch office clients.

DHCP allows a network administrator to supervise and distribute IP addresses from a central

location. This service dynamically assigns IP addresses to branch office computers or IP

telephones, so you do not need to manually assign an IP address. It also automatically assigns a

new IP address if a device connects to a different place in the network.

Refer to the following topics for more information:

• “Configuring the DHCP Mode” on page 590

• “Configuring a DHCP Server” on page 590

• “LAN settings for DHCP Server” on page 593

• “Remote Scope” on page 600

• “Configuring a DHCP Relay Agent” on page 605

• “LAN settings for DHCP Relay Agent” on page 607

• “IP Terminal DHCP Options” on page 609

DHCP configuration overview

To configure BCM as your DHCP server, you must create a scope of IP addresses for each LAN

interface and then allocate a block of IP addresses to that scope. If you already have a DHCP

server then you need to set up BCM as a relay agent to that server.

You must define one DHCP scope for each LAN interface. For DHCP service, there are global

attributes that affect all scopes and there are attributes that are specific for each scope.

If you must modify the DHCP default configuration on BCM, make sure configuration settings are

consistent throughout the network and take the following into consideration:

• If a change in the DHCP configuration resulted in a change in the IP addresses of a scope,

perform one of the following actions to ensure good system operation:

Caution: Check with your network administrator before enabling DHCP. Enabling

DHCP on a network that already has a DHCP server can cause problems on the network.

Tip

Because BCM retrieves default DHCP parameters from the LAN interface parameters,

you must configure a LAN interface before you configure the DHCP server for that

interface. For information on configuring a LAN interface, see “Configuring the LAN

resources” on page 493.

Tip

Use the BCM DHCP default configuration unless your network does not allow it.

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