3Com 4007, Implementation Manual, Page: 546 / 684

546 C
HAPTER
21: A
PPLE
T
ALK
R
OUTING
Named Entities
When a device on the network provides a service for other users, you can
give the device a name. The name appears on the
Chooser menu of the
Macintosh with an associated icon. For example, the Chooser of the
Macintosh can include a printer icon. When the user selects the printer
icon, several printer names can appear in a list, such as
Laser1
or
Laser2
.
The Name Binding Protocol (NBP), described later in this chapter,
translates these device names into AppleTalk addresses.
AppleTalk Zones
An AppleTalk zone is a logical collection of nodes on an AppleTalk
intranet. Zones make it easier to locate devices. Because your system
supports AppleTalk, Phase 2, you can associate a list of zones for each
network. Nodes on the network may belong to any of the zones
associated with the network, and you can associate the same zone name
with multiple networks. For more information about zones, see
“AppleTalk Zones” later in this chapter.
Seed Routers
A seed router initializes the intranet with AppleTalk configuration
information, including network numbers and zone names. The seed
router broadcasts this information so that nonseed routers can learn it.
You designate a seed router through the Administration Console.
A nonseed router listens for a seed router and takes configuration
information from the first one it detects. A nonseed router that obtains
configuration data participates in the network as if it is a seed router.
Terminology If you are unfamiliar with AppleTalk routing, you may want to review the
following terms:
■
Seed router — A router that initializes the AppleTalk network with
the network range and zone list information that you configure.
■
Non-seed router — A router that listens for a seed router and
obtains its network range and zone information from the seed
interface that it detects.
■
Zone — A logical subset of the systems on an AppleTalk internetwork,
for example, a logical group of AppleTalk networks. For more
information, see “AppleTalk Zones” later in this chapter.
■
Network range — The range of network numbers that are assigned
to an AppleTalk extended (Phase 2) network.