Avaya Configuring SNMP, BOOTP, DHCP, and RARP Services Uživatelský manuál stáhnout pdf (Strana 50)

Configuring SNMP, BootP, DHCP, and RARP Services

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303542-A Rev 00

RARP Overview

You can use a Bay Networks router as a Reverse Address Resolution Protocol

(RARP) server that assigns IP addresses to its clients on the local area network.

When you configure a router to use RARP services, it acts as a RARP server. A

RARP server supplies clients on the same physical or logical LAN with IP

addresses (Figure 2-8)

Figure 2-8. RARP Server Supplying an IP Address

To use RARP services, you must set up a MAC address-to-IP address mapping

table. This table lists the MAC addresses of clients and the corresponding IP

addresses that the RARP server assigns to those clients. When a client needs to

acquire an IP address, the following interchange takes place:

1. The client broadcasts a RARP request specifying its MAC address.

2. Upon receiving a RARP request, the router refers to its MAC address-to-IP

address mapping table, then sends the client a response packet containing the

corresponding IP address.

3. The client examines the response packet to learn its IP address.

You can configure RARP support on Ethernet and token ring interfaces, and on

the Fiber Distributed Data Interface (FDDI).

RARP request: What is my IP address?

RARP response: 192.32.2.23

Router (RARP server)

Server

SNM0007A

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Avaya Configuring SNMP, BOOTP, DHCP, and RARP Services Uživatelský manuál Strana 50