From: John Mistichelli (jmistichelli@xxxxxxxxx)
Date: Sat Mar 09 2002 - 23:10:52 GMT-3
Okay...
Appletalk hosts (and router interfaces) will randomly choose an address that
falls within the cable range they are connected to. A cable range is a group
of cable numbers assigned to one broadcast domain. For example if 2 hosts
are connected to cable range 100-120 they can choose any addresses that fall
into that range and still communicate as if directly connected. One can
choose 101.34 and the other 119.1. It is random. It is possible and common
to assign a static address to a host or router interface.
The router doesn't distiguish the cable numbers individually. Phase 2
identifies broadcast domains as a cable range not a single network number.
One cable range is one appletalk broadcast domain. But multiple zones can be
assigned to one cable range. Although a cable range can belong to more than
one zone, a device on a cable can only be a part of one zone. The router is
there to answer "get zone list" and "get cable range" requests.
When a host boots up it will use a temporary Apple cable number and a random
node address. It uses this temporary net.node address to communicate with a
seed router on the same network. A seed router is any device that can answer
"get cable range" requests. One such device is a Cisco router.
The seed router will respond with the configured cable range and the host
randomly picks one.
Following the random selection, Apple hosts will send an AARP request to
verify thet no other hosts are using that address.
Hope that helps
John
7536
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Huy Luu
Sent: Saturday, March 09, 2002 2:02 PM
To: ccielab@groupstudy.com
Subject: Appletalk
Question for the appletalk guru:
I'm working with a friend in a network that includes both appletalk and ip,
and I'm very confuse. If a router with an appletalk interface is assigned
an address range 10-20, and five different zone names, how will the 5 zones
map to the 10 networks spefified within the range? If an appletalk node
on the network where this router is located boots, how does it pick which
network and zone it belongs to? Can one manually configure the zone and
network for the appletalk host?
If the router is not configured for appletalk, will appletalk nodes on this
segment pick their own network, node number and zones from a range of
default values? If two nodes on the same segment pick different network
and zones, will they be able to talk?
I researched CCO, but the info provided does not answer these questions,
most are aimed at explaining the difference between phase 1 and phase 2 .
THank a million.
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