Sagem ADR 155C Guide D'installation Et D'utilisation page 65

ANNEX A - CONSTRUCTING AN IP NETWORK ADDRESSING PLAN
Interfaces
Static routes
Dest @IP Subnet mask
128.1.0.0 255.255.0.0
140.1.0.0 255.255.0.0
150.1.0.0 255.255.255.0
A.5 - Use of RIP routing demon
"RIP" is a routing demon which makes it possible to dispense with part of the static routing
tables.
The network must be divided into "AUTONOMOUS SYSTEMS" or "AS", each with a different
"NET" number.
Each AS is an RIP routing domain and must be limited to a length of 15 hops max. between two
equipment pieces requiring to exchange packets within this AS. The maximum distance is taken
into account to include the worst case security.
These ASs are mutually independent (within RIP), and are linked via isolated networks each
constituting a single link (Ethernet or point-to-point). Each isolated network has its own "NET"
number.
The equipment interfaces belonging to an isolated network must be filtering (RIP filtering option
activated on these interfaces), i.e., they prohibit export of automatic updates of RIP routing
tables. These equipment pieces with a filtering interface are designated "border".
Within an AS, all equipment pieces must have their RIP routing demon activated.
Within each AS, each link between two equipment pieces is described by a specific "SUBNET"
value.
The routings from one AS to another AS, via an isolated network, are described using static
routes.
In the example given above, "NET" 128.1 corresponds to an isolated network and "NETs" 160.1
and 150.1 correspond to ASs in which RIP is activated.
ADR155C F8 Modification
Ether IP
Ether Mask
STM1 IP
STM1 Mask
X21:P IP
X21:P Mask
Next hop
150.1.1.2
150.1.1.2
150.1.1.2
No reproduction or communication without the written consent of SAGEM SA
150.1.1.3
255.255.255.0
0.0.0.0 (Interface not put into service)
0.0.0.0
0.0.0.0 (Interface not put into service)
0.0.0.0
Interface Metric Remark
e 2 All the NET 128.1
e 3 All the NET 140.1
e 1 All the SUBNET 155.1.0
Installation and User Guide - N56717020101
Page AA-5