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PPP Commands

XSR CLI Reference Guide 8-87

Syntax of the “no” Form

ThenoformofthiscommanddisablePPPauthentication:

no ppp authentication

Default

Notenabled

Mode

Interfaceconfiguration:XSR(config-if<xx>)#

Example 1

Figure 8‐1showstworouters,SiteAandSiteB,attemptingtoauthenticateeachotherusing

CHAP.Theconfigurationexamplefollows.

Figure 8-1 Authentication Configured on Both Peers

Figure 8‐1showsbothrouterssendchallengesandresponsesandeitherafailureorsuccess.The

followingsampleconfigurationillustratestheprecedingexample.OnSiteA,enterthefollowing

commands:

XSR(config)#interface serial 1/0

XSR(config-if<S1/0>)#encapsulation ppp

XSR(config-if<S1/0>)#no shutdown

XSR(config-if<S1/0>)#ppp authentication chap

OnSiteB,enterthefollowingcommands:

XSR(config)#interface serial 1/1

XSR(config-if<S1/1>)#encapsulation ppp

XSR(config-if<S1/1>)#no shutdown

XSR(config-if<S1/1>)#ppp authentication chap

ms-chap pap chap

PreferenceofMS‐CHAPauthentication,thenPAPauthentication,thenCHAP.

ppp chap

Site A

(Serial Interface 1/0)

Site B

(Serial Interface 1/1)

Challenge - ID 4 Challenge - ID 8

Response - ID 8 Response - ID 4

Success/Failure - ID 4 Success/Failure - ID 8

ppp chap

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