CHAP and PAP Configuration Authentication

This topic describes how to configure both CHAP and PAP authentication on a Cisco router.

Configuring CHAP and PAP Authentication

Router(config-if)# ppp authentication pap chap

• Enables both CHAP and PAP, and performs PAP authentication before CHAP


Router(config-if)# ppp authentication chap pap

• Enables both CHAP and PAP, and performs CHAP authentication before PAP

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Both PAP and CHAP authentication can be configured on an interface. The first method specified is requested during link negotiation. If the peer suggests using the second method or simply refuses the first method, then the second method will be tried. This command can be useful because some remote devices support only CHAP and others only PAP.

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