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用cisco路由器通過ISDN訪問首都在線263網(wǎng)實例


本地局部網(wǎng)地址為192.168.0.0/24,屬于保留地址,通過NAT地址翻譯功能,局域網(wǎng)用戶可以通過ISDN上263網(wǎng)訪問Internet 。263的ISDN電話號碼為95963,用戶為263,口令為263,所涉及的命令如下表:
任務(wù)
命令
指定接口通過PPP/IPCP地址協(xié)商獲得IP地址
ip address negotiated
指定內(nèi)部和外部端口
ip nat {insideoutside}
使用ppp/pap作認證
ppp authentication pap callin
指定接口屬于撥號組1
dialer-group 1
定義撥號組1答應所有IP協(xié)議
dialer-list 1 protocol ip permit
設(shè)定撥號,號碼為95963
dialer string 95963
設(shè)定登錄263的用戶名和口令
ppp pap sent-username 263 passWord 263
設(shè)定默認路由
ip route 0.0.0.0 0.0.0.0 bri 0
設(shè)定符合訪問列表2的所有源地址被翻譯為bri 0所擁有的地址
ip nat inside source list 2 interface bri 0 overload
設(shè)定訪問列表2,答應所有協(xié)議
Access-list 2 permit any
具體配置如下:
hostname Cisco1720
!
isdn switch-type basic-net3
!
ip subnet-zero
no ip domain-lookup
ip routing
!
interface Ethernet 0
ip address 192.168.0.1 255.255.255.0
ip nat inside
no shutdown
!
interface bri 0
ip address negotiated
ip nat outside
encapsulation ppp
ppp authentication pap callin
ppp multilink
dialer-group 1
dialer hold-queue 10
dialer string 95963
dialer idle-timeout 120
ppp pap sent-username 263 password 263
no cdp enable
no ip split-horizon
no shutdown
!
ip classless
!
! Static Routes
!
ip route 0.0.0.0 0.0.0.0 bri 0
!
! Access Control List 2
!
access-list 2 permit any
!
dialer-list 1 protocol ip permit
!
! Dynamic NAT
!
ip nat inside source list 2 interface bri 0 overload
snmp-server community public ro
!
line console 0
exec-timeout 0 0
!

line vty 0 4
!
end

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