Sagem ADR 155C Guide D'installation Et D'utilisation page 88

ANNEX A - BUILDING A MANAGEMENT NETWORK
A.2.2.3 Networks exceeding the limits in number of RIP « hops »
To exceed the RIP constraints (limited to 16 "hops"), the network can be divided into two routing
domains in accordance with the diagram below:
Example of a network separated into 2 RIP routing domains.
The overall equipment network is divided into domains (1 and 2) in which the RIP routing is
implemented.
The Ethernet network is there to represent the link with the SNMP manager on the PC not using
the RIP.
The two domains are connected via ADR 1 and ADR 2 (which functionally are border routers).
The link between the two border ADRs can be an Ethernet link, numbered PPP or unnumbered
PPP.
The RIP is not activated on the interfaces of this link connecting the two domains.
Routing between the two domains is made possible by static routes configured in the ADRs.
ADR 1 has static routes to the sub-networks forming domain 2 and ADR 2 has routes to the sub-
networks forming domain 1.
The static routes to the sub-networks of a domain (2, for example) in the border ADR of the
other domain (ADR 1) can be reduced to a single route to a sub-network combining the sub-
networks of the domain (2).
This global sub-network must be distinct with respect to the sub-networks of the other domain
(1, in the example).
Installation and User Guide - N56717020104
Page AA-6
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Domain 2
ADR 2
Domain 1
ADR 1
ADR 0
Ethernet