GNS3桥接modem拨号and QOS限速

 

今天在GNS3上面通过Cisco 3600路由器桥接PC模拟ADSL拨号

PC通过Loopback 环回口与R2 fa1/0连接,R2 fa0/0通过桥接到PC真实网卡上拨号

拓扑图如下

 

 

R2主要配置如下:

ip cef

mls qos  //QOS限速必须开启
vpdn enable //启用VPDN全局
!
interface FastEthernet0/0
 no ip address
 duplex auto
 speed auto
 pppoe enable group global   ///启用PPPOE拨号
 pppoe-client dial-pool-number 1 //绑定拨号池
!
interface FastEthernet1/0
 ip address 172.16.1.1 255.255.255.0
 ip nat inside  //开启NAT

ip virtual-reassembly
 duplex auto
 speed auto
!
interface Dialer0  //拨号主要配置
 mtu 1492  //MTU大小(看当地电信MTU值 一般都是1480-1500)
 ip address negotiated  //IP地址自动获取
 ip nat outside //NAT开启

 ip virtual-reassembly  //IP虚拟分片重组
 ip virtual-reassembly max-reassemblies 32 //IP虚拟分片重组最大个树32
 encapsulation ppp  //启用PPP封装验证
 dialer pool 1 //关联地址池
 dialer-group 1 //关联接口刺激拨号
 ppp pap sent-username Cixla password 0 110 //ADSL账号和密码

!
ip route 0.0.0.0 0.0.0.0 Dialer0 //默认出口路由
!
ip nat inside source list 1 interface Dialer0 overload //PAT规则
!
access-list 1 permit any
dialer-list 1 protocol ip permit  //抓取PPPOE感兴趣流
 

成功拨号如下:

show interface dialer 0

 

show ip int br

 

show ip route

 PC上测试:

 

 

 

QOS限速(限制下载速度不超过64KB)

access-list 102 permit ip 172.16.1.0 0.0.0.255 any
access-list 102 permit ip any 172.16.1.0 0.0.0.255
 

 class-map match-all 172
 match access-group 102

!
!
policy-map QOS1
 class 172
  police cir 512000 //限速64KB
    conform-action transmit
    exceed-action drop
!
interface FastEthernet1/0  ///NAT inside方向
 ip address 172.16.1.1 255.255.255.0
 ip nat inside
 ip virtual-reassembly
 duplex auto
 speed auto
 service-policy input QOS1
 service-policy output QOS1

查看有没匹配ACL

或者采用CAR   限速

rate-limit output access-group 102 512000 8000 16000 conform-action transmit exceed-action drop

效果一样