我设置路由器拨号接入时有错误发生，请各位达人帮助

DCSS

客户端拨号之后，出现错误734：PPP连接控制协议终止

路由器方面：
设置aux口login时有警告发生
huipiao1(config-line)#login authentication default
AAA: Warning authentication list "default" is not defined for LOGIN.

sh run了一下，发现前面有AAA认证

Current configuration : 10329 bytes
!
version 12.2
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname huipiao1
!
aaa new-model
aaa authentication ppp vpdn group radius
aaa authorization network default group radius
enable secret 5 $1$QxiY$EfilWz4X/IQUFiwtPG61u/
enable password unix



我用的口是async 225口，配置如下，在设置encapsulation ppp时，也出现警告：

huipiao1(config-if)#ppp authentication pap
AAA: Warning, authentication list "default" is not defined for PPP.



interface Async225
description Aux Port
ip address 100.32.1.1 255.255.255.252
encapsulation ppp
keepalive 9
dialer in-band
dialer idle-timeout 15000
dialer map ip 100.32.1.2 name gxzq
async default routing
async dynamic address
async dynamic routing
async mode dedicated
peer default ip address pool gxzqip
fair-queue 64 16 0
pulse-time 1
!

请问这是怎么回事，应该怎么解决，谢谢