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Designing ISDN Internetworks 11-19

Dial-on-Demand Routing

IPX Dialer Lists

IPX dialer lists are similar to IP dialer lists. They can be used in two ways: to establish general

protocol access or to call more speciﬁc access lists. The following dialer-list command is a generic

statement that creates dialer list 2 and permits all IPX trafﬁc:

dialer-list 2 protocol ipx permit

The following dialer-list command creates dialer list 6 and calls all extended access lists

numbered 901:

dialer-list 6 protocol ipx list 901

access-list 901 permit -1 -1

The access-list command establishes access lists, which use network-layer ﬁltering to control trafﬁc.

Standard IPX access lists are numbered from 800 to 899 and extended access lists are numbered

between 900 and 901. The ﬁrst “-1” permits packets from any network, and the second “-1” permits

packets destined to any network.

To associate a dialer list with a speciﬁc ISDN interface, use the dialer-group interface conﬁguration

command.

Note Because only one dialer-group command is allowed per interface, all of the dialer-list

commands associated with a speciﬁc interface must use the same number.

IPX Dialer Maps

When used in IPX networks, the dialer map interface conﬁguration command associates an IPX

network address with an ISDN number. In addition to specifying the IPX address of the destination

router and the ISDN number to be dialed, the dialer map command speciﬁes the name of the router

that is being called (which, to pass PPP CHAP authentication, must match the name of the router)

and the speed at which the call is to be placed.

Note The name that is used in the dialer map statement must also exist as a user name with a

password on the local router.

The following is an example of the dialer map command:

dialer map IPX AB449EB8.0000.0c00.9f80 name althea broadcast 14085551111

The broadcast command allows RIP and SAP routing updates to cross the ISDN link. If static routes

are being used, the broadcast keyword is not necessary. You can use a combination of snapshot

routing and access lists to prevent connections from being established for the sole purpose of

exchanging protocol updates. See the “Tariff Management” section later in this chapter.

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Cisco 1003 - 1003 Router Manual de usuario Pagina 19