Cisco 1003 - 1003 Router Bedienungsanleitung PDF herunterladen (Seite 21)

Designing ISDN Internetworks 11-21

Tariff Management

dialer map ip 171.68.158.25 name RouterA speed 64 14085551111

dialer map appletalk 7360.25 name RouterA speed 64 broadcast 14085551111

dialer map IPX AB449EB8.0000.0c00.9f80 name RouterA speed 64 broadcast 14085551111

dialer-group 1

ppp authentication chap

ip route 171.68.158.16 255.255.255.248 171.68.158.25

access-list 101 permit ip any any

! The next two commands are optional if dynamic routing is used.

ipx route 2FCB6448 AB449EB8.0000.0c00.9f80

ipx route AB449EA0 AB449EB8.0000.0c00.9f80

!The next command establishes a static SAP entry and is optional if

!dynamic routing is used.

ipx sap 4 DARKSTAR 2F6DD0C0C2.0000.0000.0001 451 2

dialer-list 1 protocol ip list 101

dialer-list 1 protocol AppleTalk permit

dialer-list 1 protocol novell permit

For information about optimizing IPX connections over ISDN, see the sections “Tariff

Management” and “Performance,” later in this chapter.

IPX Floating Static Routes

With Cisco IOS Software Release 10.3 or later, the administrative distance of an IPX static route can

be conﬁgured so that the static route is less desirable than a dynamic route. This technique is known

as ﬂoating static routes. If the dynamic route is lost, the ﬂoating static route can take over, and trafﬁc

can be sent through this alternative route. When an ISDN interface is conﬁgured as a ﬂoating static

route, it can be used as a backup mechanism.

Tariff Management

As a circuit-switched connection, ISDN is billed, or tariffed, based on usage. Given this model, the

conﬁguration goal is to minimize up time by controlling the kinds of packets that bring the link up.

Minimizing up time becomes a challenge when routing protocols are used because of their need to

send regular broadcasts that contain routing information.

This section describes the following techniques for controlling routing updates:

• Routing

• Access Lists

• Protocol-Speciﬁc Techniques

Depending on the protocols your network runs, you might want to use a combination of the

techniques described in this section.

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Cisco 1003 - 1003 Router Bedienungsanleitung Seite 21