江浙沪招生考试网

环境：两台路由器，由BRI口相连。

要求：通过ISDN线路实现两个网段的互通，使用PPP CHAP验证，定义所有的IP流为感兴趣流。

 

 

 

 

步骤1、初始化配置

 

r1的配置：

r1(config)#no ip domain-lookup

r1(config)#line console 0

r1(config-line)#logging synchronous

r1(config-line)#exec-timeout 0 0

r1(config-line)#

 

r2的配置：

r2(config)#no ip domain-lookup

r2(config)#line console 0

r2(config-line)#logging synchronous

r 2(config-line)#exec-timeout 0

r2(config-line)#

 

步骤二、ISDN的配置

 

r1的配置:

r1(config)#isdn switch-type basic-net3      à交换机类型

r1(config)#username r2 password cisco     à验证用户名及密码

r1(config)#dialer-list 1 protocol ip permit   à定义兴趣流

 

r2的配置:

r2(config)#isdn switch-type basic-net3

r2(config)#username r1 password cisco

r2(config)#dialer-list 1 protocol ip permit

 

步骤三、配置验证

 

r1的配置:

r1(config)#interface loopback 0

r1(config-if)#ip address 10.1.1.1 255.255.255.0

r1(config-if)#interface bri0

r1(config-if)#encapsulation ppp                 à封装PPP

r1(config-if)#ppp authentication chap            à启用CHAP验证

r1(config-if)#ip address 30.1.1.1 255.255.255.0

r1(config-if)#dialer-group 1                     à加载感兴趣流

r1(config-if)#dialer map ip 30.1.1.2 name r2 1102   à拨号映射

r1(config-if)#dialer idle-time 180                 à定义超时

r1(config-if)#no fair-queue                      à关闭公平对列

r1(config-if)#no shutdown

 

r2的配置:

r2(config)#interface loopback 0

r2(config-if)#ip address 20.1.1.1 255.255.255.0

r2(config-if)#interface bri0

r2(config-if)#encapsulation ppp

r2(config-if)#ppp authentication chap

r2(config-if)#ip address 30.1.1.2 255.255.255.0

r2(config-if)#dialer-group 1

r2(config-if)#dialer map ip 30.1.1.1 name r1 1101

r2(config-if)#dialer idle-time 180

r2(config-if)#no fair-queue

r2(config-if)#no shutdown

 

步骤四、定义静态路由

r1(config)#ip route 20.1.1.0 255.255.255.0 30.1.1.2    à指定静态路由

 

r2(config)#ip route 10.1.1.0 255.255.255.0 30.1.1.1

 

步骤五、测试

r1#ping              à触发感兴趣流

Protocol [ip]:

Target IP address: 20.1.1.1

Extended commands [n]: y

Source address or interface: 10.1.1.1

.!!!!

 

 

步骤六、查看相应状态

 

r1#show isdn status   à查看ISDN状态

Global ISDN Switchtype = basic-net3

ISDN BRI0 interface

        dsl 0, interface ISDN Switchtype = basic-net3

    Layer 1 Status:

        ACTIVE

    Layer 2 Status:

        TEI = 71, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED

    Layer 3 Status:

        1 Active Layer 3 Call(s)

        CCB:callid=8003, sapi=0, ces=1, B-chan=2, calltype=DATA

    Active dsl 0 CCBs = 1

    The Free Channel Mask:  0x80000001

    Total Allocated ISDN CCBs = 1

 

Total Allocated ISDN CCBs = 1

 

r1#show isdn active    à此命令可以显示当前活跃的连接

--------------------------------------------------------------------------------

                                ISDN ACTIVE CALLS

--------------------------------------------------------------------------------

Call    Calling      Called       Remote  Seconds Seconds Seconds Charges

Type    Number       Number       Name    Used    Left    Idle    Units/Currency

--------------------------------------------------------------------------------

Out   ---N/A---        1101           r1            11     170       9      0

--------------------------------------------------------------------------------

 

 

r1#show interface bri0:1     à查看接口状态

BRI0:1 is down, line protocol is down

 

r1#show interface bri0:2          à占用了一个B信道

BRI0:2 is up, line protocol is up

 

 

步骤七、显示当前配置

 

r1的当前配置：

r1#show running-config

hostname r1

!

username r2 password 0 cisco

no ip domain-lookup

 

isdn switch-type basic-net3

!

interface Loopback0

 ip address 10.1.1.1 255.255.255.0

!

interface BRI0

 ip address 30.1.1.1 255.255.255.0

 encapsulation ppp

 dialer idle-timeout 180

 dialer map ip 30.1.1.2 name r2 2202

 dialer-group 1

 isdn switch-type basic-net3

 no fair-queue

 ppp authentication chap

!

ip route 20.1.1.0 255.255.255.0 30.1.1.2

!

dialer-list 1 protocol ip permit

!

end

 

r2的当前配置：

r2#show running-config

!

hostname r2

!

!

username r1 password 0 cisco

no ip domain-lookup

!

isdn switch-type basic-net3

!

interface Loopback0

 ip address 20.1.1.1 255.255.255.0

!

interface BRI0

 ip address 30.1.1.2 255.255.255.0

 encapsulation ppp

 dialer idle-timeout 180

 dialer map ip 30.1.1.1 name r1 2201

 dialer-group 1

 isdn switch-type basic-net3

 no fair-queue

 ppp authentication chap

!

ip route 10.1.1.0 255.255.255.0 30.1.1.1

!

dialer-list 1 protocol ip permit

!

end