Avaya Configuring IP, ARP, RARP, RIP, and OSPF Services Uživatelský manuál stáhnout pdf (Strana 35)

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IP Concepts, Terminology, and Features

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Reverse Address Resolution Protocol (RARP)

You can configure a Nortel Networks router as a Reverse Address Resolution

Protocol (RARP) server. A RARP server supplies clients on the same physical or

logical LAN with IP addresses (Figure 1-5)

Figure 1-5. 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 exchange 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, token ring, and Fiber Distributed

Data Interface (FDDI) interfaces.

RARP request: What is my IP address?

RARP response: 192.32.2.23

Router (RARP server)

Server

SNM0007A

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