Cisco 1003 - 1003 Router Manual de usuario descargar pdf (Pagina 12)

11-12 Internetwork Design Guide

Dial-on-Demand Routing

Encapsulation and Authentication

ISDN interfaces can be conﬁgured for High-Level Data Link Control (HDLC), Frame Relay, Link

Access Procedure, Balanced (LAPB), Point-to-Point Protocol (PPP), and X.25 encapsulation. When

you conﬁgure PPP encapsulation, you can specify the use of Password Authentication Protocol

(PAP) or Challenge Handshake Authentication Protocol (CHAP). CHAP is recommended because

it sends an encrypted form of the password. (PAP sends the password in clear text.)

Sample IP Conﬁguration

The following conﬁgurations for Router A and Router B use DDR to enable IP over BRI 0 using

static IP routes. For information about using access lists to prevent routing updates from initiating

connections, see the section “Tariff Management” later in this chapter.

hostname RouterA

enable password ######

username RouterB password 7 2394943E02B17

isdn switch-type basic-5ess

interface ethernet 0

ip address 171.68.158.18 255.255.255.248

interface bri 0

ip address 171.68.158.25 255.255.255.248

encapsulation ppp

dialer map ip 171.68.158.26 name RouterB 14085552222

dialer-group 1

ppp authentication chap

ip route 171.68.158.48 255.255.255.248 171.68.158.26

access-list 101 permit ip any any

dialer-list 1 protocol ip list 101

The conﬁguration for Router B is as follows:

!hostname RouterB

enable password ######

username RouterA password 7 094E5B1739522

isdn switch-type basic-5ess

interface ethernet 0

ip address 171.68.158.49 255.255.255.248

interface bri 0

ip address 171.68.158.26 255.255.255.248

encapsulation ppp

dialer map ip 171.68.158.25 name RouterA 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

dialer-list 1 protocol ip list 101

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