Avaya Configuring AppleTalk Services Bedienungsanleitung PDF herunterladen (Seite 32)

Configuring AppleTalk Services

1-14

When the router receives an NBP Broadcast Request packet for a named entity

from an AppleTalk node, it refers to its zone list to see in which network the

requested entity’s zone is located. If the zone is on the local network, it broadcasts

an NBP Lookup Request packet. If the zone is located on a different network, it

sends out an NBP Forward Request packet toward the router connected to the

network with the destination zone. Upon receiving a forward request, that router

then broadcasts an NBP Lookup Request (F

igure 1-8).

Figure 1-8. NBP Packets

An NBP named entity consists of the name, type, and zone name, where

• Name is the name assigned to the device that identiﬁes it on the network.

• Type speciﬁes the device type; for example, the type speciﬁed for a laser

printer is identiﬁed by the type LaserWriter.

• Zone name speciﬁes the AppleTalk zone in which the device resides.

AppleTalk Echo Protocol (AEP)

The Bay Networks AppleTalk router supports the AppleTalk Echo Protocol

(AEP), which allows the router to respond to echo packets it receives from other

nodes on the network.

NBP Broadcast Request

Function

NBP ID

NBP Tuple

NBP Lookup Request, and

NBP Forward Request

Function = 1 = BrRq

Function = 2 = LkUpRq

Function = 3 = FwdRq

NBP Lookup Reply

Function

NBP ID

NBP Tuple 1

Tuple Count

NBP Tuple 2

NBP Tuple 3

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 123 124

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Avaya Configuring AppleTalk Services Bedienungsanleitung Seite 32