（第二章）广域网协议设置续4.1
4. ISDN访问首都在线263网实例:
本地局部网地址为10.0.0.0/24,属于保留地址，通过NAT地址翻译功能，局域网用户可以通过ISDN上263网访问Internet。263的ISDN电话号码为2633，用户为263，口令为263，所涉及的命令如下表：
|
任务
|
命令
|
|
指定接口通过PPP/IPCP地址协商获得IP地址
|
ip address negotiated
|
|
指定内部和外部端口
|
ip nat {inside | outside}
|
|
使用ppp/pap作认证
|
ppp authentication pap callin
|
|
指定接口属于拨号组1
|
dialer-group 1
|
|
定义拨号组1允许所有IP协议
|
dialer-list 1 protocol ip permit
|
|
设定拨号，号码为2633
|
dialer string 2633
|
|
设定登录263的用户名和口令
|
ppp pap sent-username 263 password 263
|
|
设定默认路由
|
ip route 0.0.0.0 0.0.0.0 bri 0
|
|
设定符合访问列表2的所有源地址被翻译为bri 0所拥有的地址
|
ip nat inside source list 2 interface bri 0 overload
|
|
设定访问列表2，允许所有协议
|
access-list 2 permit any
|
具体配置如下：
hostname Cisco2503
!
isdn switch-type basic-net3
!
ip subnet-zero
no ip domain-lookup
ip routing
!
interface Ethernet 0
ip address 10.0.0.1 255.255.255.0
ip nat inside
no shutdown
!
interface Serial 0
shutdown
no description
no ip address
!
interface Serial 1
shutdown
no description
no ip address
!
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 2633
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
5. Cisco765M通过ISDN拨号上263
由于Cisco765的设置命令与我们常用的Cisco路由器的命令不同，所以以下列举了通过Cisco765上263访问Internet的具体命令行设置步骤。
>set system c765
c765> set multidestination on
c765> set switch net3
c765> set ppp multilink on
c765> cd lan
c765:LAN> set ip routing on
c765:LAN> set ip address 10.0.0.1
c765:LAN> set ip netmask 255.0.0.0
c765:LAN> set briding off
c765:LAN>cd
c765> set user remotenet
New user remotenet being created
c765:remotenet> set ip routing on
c765:remotenet> set bridging off
c765:remotenet> set ip framing none
c765:remotenet> set ppp clientname 263
c765:remotenet> set ppp password client
Enter new Password: 263
Re-Type new Password: 263
c765:remotenet> set ppp authentication out none
c765:remotenet> set ip address 0.0.0.0
c765:remotenet> set ip netmask 0.0.0.0
c765:remotenet> set ppp address negotiation local on
c765:remotenet> set ip pat on
c765:remotenet> set ip route destination 0.0.0.0/0 gateway 0.0.0.0
c765:remotenet> set number 2633
c765:remotenet> set active
命令描述如下：
|
任务
|
命令
|
|
设置路由器系统名称
|
set system c765
|
|
允许路由器呼叫多个目的地
|
set multidestination on
|
|
设置ISDN交换机类型为NET3
|
set switch net3
|
|
允许点到点间多条通道连接实现负载均衡
|
set ppp multilink on
|
|
关掉桥接
|
set briding off
|
|
建立用户预制文件用于设置拨号连接参数- 可以设置多个用户预制文件用于相同的物理端口对应于不同的连接。
|
set user remotenet
|
|
使用PPP/IPCP
|
set ip framing none
|
|
设置上网用户帐号
|
set ppp clientname 263
|
|
设置上网口令
|
set ppp password client
Enter new Password: 263
Re-Type new Password: 263
|
|
不用PPP/CHAP或PAP做认证
|
set ppp authentication out none
|
|
允许地址磋商
|
set ppp address negotiation local on
|
|
设置地址翻译
|
set ip pat on
|
|
设置默认路由
|
set ip route destination 0.0.0.0/0 gateway 0.0.0.0
|
|
设置ISP的电话号码
|
set number 2633
|
|
激活用户预制文件
|
set active
|
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