3Com CoreBuilder 3500, Implementation Manual

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454 C
HAPTER
16: A
PPLE
T
ALK
AppleTalk Network
Elements
An AppleTalk network consists of different nodes and groups of
networks. Nodes can include workstations, routers, printers, and servers
that provide services for other computers, called
clients .
This section describes the elements of an AppleTalk network:
■
AppleTalk Networks
■
AppleTalk Nodes
■
Named Entities
■
AppleTalk Zones
■
Seed Routers
AppleTalk Networks
A subnetwork in an AppleTalk intranet is a cable segment attached to a
router. Each subnetwork is identified by a network number or range of
network numbers. You assign these numbers from a range of valid
network numbers.
Two AppleTalk network numbering systems are currently in use:
nonextended (Phase 1) and extended (Phase 2). 3Com routers support
extended network numbers. While the CoreBuilder
® 3500 system does
not translate Phase 1 packets to Phase 2 packets, it does route packets to
a Phase 1 network. The system anticipates that a gateway exists between
the two networks to translate the packets.
An extended intranet can span a range of logical networks. Network
numbers in an extended network consist of a range, such as network
15 through 20. This numbering scheme allows as many as 16,580,608
nodes, although the actual cables do not support this many nodes.
AppleTalk Nodes
A node in a AppleTalk network is any addressable device, including a
workstation, printer, or router. Nodes are physically attached to a
network. At initialization, each node in an AppleTalk network selects a
unique AppleTalk address. The address consists of the node’s network
number and a unique node number.