Chapter 12 Avaya P330 Layer 3 Features

packet moves through the internetwork, its physical address changes but its protocol address remains constant. This process is illustrated in the figure below.

Figure 12.1 Routing

The relation between the destination host’s protocol address and its physical address is obtained by the routers using the ARP request/reply mechanism, and the information is stored within the ARP table in the router (see “The ARP Table“ on page 111).

Within an enterprise, routers serve as an intranet backbone that interconnects all networks. This architecture strings several routers together via a high-speed LAN topology such as Fast Ethernet or Gigabit Ethernet. Within the global Internet, routers do all the packet switching in the backbones.

Another approach within an enterprise is the collapsed backbone, which uses a single router with a high-speed backplane to connect the subnets, making network management simpler and improving performance.

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Avaya P332G-ML manual Routing