使用Virtual-Template在帧中继中实现ppp验证功能

一、目的：在通过帧中继网络通信的两台路由器之间实现验证功能（封装类型为帧中继的串行接口不能进行PPP验证，使用Virtual-Template来实现）。
二、实验拓扑图：

三、具体配置：
1、路由器R1:
username R1 password 0 00830725
!
!
interface Serial0/0
 no ip address
 encapsulation frame-relay IETF
 serial restart-delay 0
 frame-relay interface-dlci 102 ppp Virtual-Template10 （将虚拟模板与本地dlci值关联）
 no frame-relay inverse-arp
!
!
interface Virtual-Template10 
 bandwidth 1544
 ip address 192.168.1.1 255.255.255.0
 ppp authentication pap
!

2、路由器R2:
!
interface Serial0/0
 no ip address
 encapsulation frame-relay IETF
 serial restart-delay 0
 frame-relay interface-dlci 201 ppp Virtual-Template10  （将虚拟模板与本地dlci值关联）
 no frame-relay inverse-arp
!
!
interface Virtual-Template10 
 bandwidth 1544
 ip address 192.168.1.2 255.255.255.0
 ppp pap sent-username R1 password 0 00830725
!
四、验证
1. sh ip int bri (查看接口状态)

virtual-template接口的状态永远为down/down，主要看virtual-template生成的virtual-access的值为UP/UP则接口启用。
2.ping

3.sh frame-relay pvc

4.查看virtual-access 1的状态
sh int virtual-access 1

五、附录：
pap 认证过程
服务端：
R1#
*Mar  1 00:36:40.599: Vi1 PPP: Using default call direction
*Mar  1 00:36:40.599: Vi1 PPP: Treating connection as a dedicated line
*Mar  1 00:36:40.599: Vi1 PPP: Session handle[B000001C] Session id[54]
*Mar  1 00:36:40.603: Vi1 PPP: Authorization required
*Mar  1 00:36:40.959: Vi1 PAP: I AUTH-REQ id 4 len 16 from "R1"
*Mar  1 00:36:40.959: Vi1 PAP: Authenticating peer R1
*Mar  1 00:36:40.963: Vi1 PPP: Sent PAP LOGIN Request
*Mar  1 00:36:40.967: Vi1 PPP: Received LOGIN Response PASS
*Mar  1 00:36:40.971: Vi1 PPP: Sent LCP AUTHOR Request
*Mar  1 00:36:40.975: Vi1 PPP: Sent IPCP AUTHOR Request
*Mar  1 00:36:40.979: Vi1 LCP: Received AAA AUTHOR Response PASS
*Mar  1 00:36:40.983: Vi1 IPCP: Received AAA AUTHOR Response PASS
*Mar  1 00:36:40.983: Vi1 PAP: O AUTH-ACK id 4 len 5
*Mar  1 00:36:41.199: Vi1 PPP: Sent IPCP AUTHOR Request
R1#
*Mar  1 00:36:41.587: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to up
*Mar  1 00:36:41.983: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Access1, changed state to up

客户端：
R2#
*Mar  1 00:36:28.359: Vi1 PPP: Authorization required
*Mar  1 00:36:28.471: Vi1 PPP: No authorization without authentication
*Mar  1 00:36:28.471: Vi1 PAP: Using hostname from interface PAP
*Mar  1 00:36:28.471: Vi1 PAP: Using password from interface PAP
*Mar  1 00:36:28.475: Vi1 PAP: O AUTH-REQ id 4 len 16 from "R1"
*Mar  1 00:36:28.723: Vi1 PAP: I AUTH-ACK id 4 len 5