11-2 User’s Reference Guide
If the cabling of your network were a street system, then a node address would correspond to a building’s
street address. Node addresses are not permanent. Each AppleTalk device determines its node address at
star tup. Although a Macintosh that is star ting up will tr y to use its previous address, the address will often be
different upon restar t. This
dynamic node addressing
scheme prevents conflicts when devices are moved
between networks and simplifies the administrative tasks of a network. If you have only one network, the node
address alone is all the information AppleTalk needs to send a packet from one computer to another.
However, networks can be connected together through
routers
, such as the Netopia R7100, into an
internetwork
(often shor tened to
internet
). Because devices on different networks can have duplicate node
numbers, AppleTalk tells them apar t according to an additional par t of their addresses: the
network number
.
The Netopia R7100 assigns a unique network number to each member network. In terms of the city street
metaphor, the network number is similar to the name of the street. Putting a network number together with a
node number fully specifies the address of a node on an internet.
To make the ser vices on an internet manageable, groups of devices on a network can be grouped into zones.
When this is done, selecting a network ser vice (ser ver, etc.) includes choosing a zone from which the ser vice
can be selected. Like network numbers,
zone names
are assigned by routers.
A
routing table
is maintained by each AppleTalk router. The table ser ves as a map of the internet, specifying
the path and distance, in hops, between its router and other networks. The routing table is used to determine
whether a router will for ward a data packet and, if so, to which network.
You can use the information in the AppleTalk routing table to obser ve and diagnose the Netopia R7100’s
current connections to other AppleTalk routers. To go to the AT Routing Table screen from the Netopia R7100’s
console, select
Statistics & Logs
from the Main Menu and then select
AppleTalk Routing Table
. An AT Routing
Table similar to the one shown below appears.
A router has multiple communications por ts and is capable of for warding information to other routers and
devices on the internet. The router per forms packet for warding, network and device address maintenance, and
other administrative functions required by the AppleTalk protocols.
AT Routing Table
-Net---Range--Def Zone Name----------Hops-State-Next Rtr Addr.--Pkts Fwded
----------------------------------SCROLL UP--------------------------
1 -- Admin 2 Good 46.131 0
2 -- AdMan 2 Good 46.131 0
3 -- Aspirations 2 Good 46.131 0
4 -- Sales 2 Good 46.131 0
5 -- Marketing 2 Good 46.131 0
6 -- Molluscs 2 Good 46.131 1
7 -- Customer Service 2 Good 46.131 1
8 -- Telemarketing 2 Good 46.131 0
10 -- Rio 2 Good 46.131 0
11 -- Regiment 2 Good 46.131 0
12 -- Rhinos 2 Good 46.131 0
16 -- Unique Services 2 Good 46.131 0
*24 27 Aspirations 1 Good 46.131 79
28 31 Rhinos 1 Good 46.131 15
---------------------------------SCROLL DOWN-------------------------
UPDATE
'*' Entries have multiple zone names. Return/Enter on these to see zone list.
Summary of Contents for R7100
Page 1: ...Netopia R7100 SDSL Router User s Reference Guide ...
Page 12: ...User s Reference Guide ...
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Page 110: ...9 30 User s Reference Guide ...
Page 116: ...10 6 User s Reference Guide ...
Page 148: ...12 20 User s Reference Guide WAN Event History page ...
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