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Configuring DECnet Services

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308619-14.00 Rev 00

Together, the Area ID and Node ID form a 16-bit DECnet Phase IV address

(Figure 1-1)

. The first 6 bits identify the area in which the node resides; the last 10

bits identify the node itself. Each DECnet Phase IV address must be unique within

the network.

Figure 1-1. DECnet Phase IV Address

A Nortel Networks router running the routing software for a DECnet Phase IV

network can service multiple areas; that is, you can assign a DECnet Phase IV

address to each of the router’s individual interfaces, rather than to the entire router.

For example, if a router resides in multiple areas (has circuits connecting to more

than one area), you assign an Area ID and Node ID for each area to which it

connects. A router can also have several interfaces (each one with a unique Node

ID) in the same area.

In Figure 1-2

, circuits E21 and E22 have different DECnet addresses, even though

they connect to the same router. Note that each circuit’s address is still unique

within its area and within the DECnet network.

Area ID

6 bits

10 bits

Node ID

DEC0001A

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 79 80

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Avaya Configuring DECnet Services Bedienungsanleitung Seite 18