有个关于PPP的实验问题求解。。
RTA和RTB通过S口相连，各路由器上的S接口也配置了IP地址，并可以互相ping通。然后在RTA上配置PAP验证过程如下：
local-user rtb
New local user added.
password simple pwdpwd
service-type ppp
quit
interface Serial 0/1/0
ppp authentication-mode pap
display this
#
interface Serial0/1/0
link-protocol ppp
ppp authentication-mode pap
ip address 10.1.1.1 255.255.255.252
#
return
配置完成后，RTA依然可以和RTB互通，
display interface Serial 0/1/0
Serial0/1/0 current state: UP
Line protocol current state: UP
Description: Serial0/1/0 Interface
The Maximum Transmit Unit is 1500, Hold timer is 10(sec)
Internet Address is 10.1.1.1/30 Primary
Link layer protocol is PPP
LCP opened, IPCP opened
Output queue : (Urgent queuing : Size/Length/Discards)0/100/0
Output queue : (Protocol queuing : Size/Length/Discards)0/500/0
Output queue : (FIFO queuing : Size/Length/Discards)0/75/0
Interface is V35
70 packets input,1226 bytes
71 packets output,1244 bytes
求解。。。
你想解什么啊？
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