Avaya Configuring IP, ARP, RARP, RIP, and OSPF Services Instrukcja Użytkownika Pobierz pdf (Strona 34)

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Configuring IP, ARP, RARP, RIP, and OSPF Services

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In Figure 1-4, the router wants to send a packet to host C but knows only host C’s

IP address. The router uses ARP to determine host C’s physical address, as

follows:

1. The router broadcasts a special packet, called an ARP request, that asks IP

address 140.250.200.4 to respond with its physical address.

2. All network hosts receive the broadcast request.

3. Only host C responds with its hardware address.

The router maps host C’s IP address (140.250.200.4) to its physical address

(00 00 A2 00 10 40) and saves the results in an address-resolution cache for future

use.

The router can send ARP requests even if ARP, which is a dynamically loaded

module, is not currently loaded on the router. To ensure that ARP is loaded

correctly on a slot using Site Manager, choose Events Manager > Options >

Filters; then select LOADER and Debug, and choose File > Get Current Log File.

Verify that ARP is loaded on a slot by locating the following message in the log:

#xx:01/01/99 10:10:55.00 DEBUG SLOT x LOADERCODE:33

Loader service completed for ARP.EXE 0xxxxxxxxx

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 ... 389 390

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Avaya Configuring IP, ARP, RARP, RIP, and OSPF Services Instrukcja Użytkownika Strona 34

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