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Configuring AppleTalk Services
1-14 117366-A Rev. A
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.
AppleTalk Update-based Routing Protocol (AURP)
The Bay Networks AppleTalk router supports the AppleTalk Update-based
Routing Protocol (AURP), which provides an optional set of features that you can
use with an AppleTalk Phase 2 network. AURP provides more efficient use of
network bandwidth, increased network security, and enables AppleTalk networks
to exchange data through a tunnel.
Bay Networks supports three major AURP features:
AURP tunneling to allow AppleTalk communications over existing wide-area
Internet Protocol (IP) backbones
Update-based routing table maintenance to reduce bandwidth use over a
tunnel
Hop count reduction to extend the current AppleTalk 15-hop limit
The following sections provide a brief overview of the AURP features that Bay
Networks router software supports.
AURP Tunneling
AURP tunneling lets you connect two or more previously unconnected AppleTalk
internets over an IP internet (Figure 1-9). The sending router encapsulates each
AppleTalk data packet in IP and delivers it to the router on the other side of the
tunnel. The router receiving the encapsulated packet removes the IP header and
forwards the packet to the appropriate destination using standard AppleTalk
delivery mechanisms.
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