Avaya Configuring IP Services Manual de usuario descargar pdf (Pagina 143)

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101

Configuring Address Resolution

303528-A Rev 00

5-3

In Figure 5-1, 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.

Note: The router can send out ARP requests even if ARP, which is a

dynamically loaded module, is not currently loaded on the router. As the

network administrator, you must ensure that ARP is loaded correctly on a slot.

To do this through 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:01/01/95 10:10:55.00 DEBUG SLOT x LOADERCODE:33

Loader service completed for ARP.EXE 0xxxxxxxxx

1 2 ... 138 139 140 141 142 143 144 145 146 147 148 ... 649 650

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