Operation Manual

72 NetWare MultiProtocol Router for ISDN 3.1 Installation and ISDN Configuration Guide
Important
General Recommendations
Fixed Tariffs
TPC/IP
Static Routes/Services
recommendations for the respective protocols and additional notes
on when and how to implement classic WAN links and dial-around
links will be given.
For the non-routable protocols SNA and NetBIOS you cannot configure
static routes, but can only use source route bridging. Therefore, SNA and
NetBIOS are not discussed in the following sections.
Whenever you use one of the ISDN accesses and line types that have
fixed tariffs and are not charged by the duration of a connection, i.e.
D64S, DS01, DS02, 1TR6 with "Vorbestellte Dauerwählverbindung"
or TS 03 with "Semi Permanent Connection", you may choose what-
ever applies best in your opinion.
All considerations in this section apply for normal circuit-switched
lines that are charged by the duration of each connection. They are
intended give you indications for the best way to set up your WAN
links in regard to cost-efficiency in this sense.
When using TCP/IP, the general recommendation is to configure
static routes instead of using RIP, RIP II or OSPF, irrespective of
whether networks are of a static or dynamic nature. Using static
routes is common with TCP/IP, and routing protocols involve
exchange of routing information; the most critical is RIP exchanging
routing information every 60 seconds.
Using static routes instead of a routing protocol over ISDN always
has the advantage that no routing and services information is ex-
changed over ISDN. The drawback is, that if servers and services
that shall be available in the WAN change frequently, i.e. new serv-
ers, segments and services are added, removed, or their status
changes, these changes have to be reflected in the static routes and
services configuration of each router involved.
configuration overview.pm6 28.05.97, 00:0372