注：1.交換機類型如下表,國內交換機一般為basic-net3。 按區域分要害字 交換機類型 Australia basic-ts013 Australian TS013 switches Europe basic-1tr6 German 1TR6 ISDN switches basic-nwnet3 Norway NET3 switches (phase 1) basic-net3 NET3 ISDN switches (UK, Denmark, and other nations); covers the Euro-ISDN E-DSS1 signalling system primary-net5 NET5 switches (UK and Europe) vn2 French VN2 ISDN switches vn3 French VN3 ISDN switches Japan ntt Japanese NTT ISDN switches primary-ntt Japanese ISDN PRI switches North America basic-5ess AT&T basic rate switches basic-dms100 NT DMS-100 basic rate switches basic-ni1 National ISDN-1 switches primary-4ess AT&T 4ESS switch type for the U.S. (ISDN PRI only) primary-5ess AT&T 5ESS switch type for the U.S. (ISDN PRI only) primary-dms100 NT DMS-100 switch type for the U.S. (ISDN PRI only) New Zealand basic-nznet3 New Zealand Net3 switches
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3. ISDN實現DDR（dial-on-demand routing）實例:
設置如下： Router1: hostname router1 user router2 passWord cisco ! isdn switch-type basic-net3 ! interface bri 0 ip address 192.200.10.1 255.255.255.0 encapsulation ppp dialer map ip 192.200.10.2 name router2 572 dialer load-threshold 80 ppp multilink dialer-group 1 ppp authentication chap ！ dialer-list 1 protocol ip permit ! Router2: hostname router2 user router1 password cisco ! isdn switch-type basic-net3 ! interface bri 0 ip address 192.200.10.2 255.255.255.0 encapsulation ppp dialer map ip 192.200.10.1 name router1 571 dialer load-threshold 80 ppp multilink dialer-group 1 ppp authentication chap ！ dialer-list 1 protocol ip permit ! Cisco路由器同時支持回撥功能，我們將路由器Router1作為Callback Server,Router2作為Callback Client。 與回撥相關命令: 任務 命令 映射協議地址和電話號碼，并在接口上使用在全局模式下定義的PPP回撥的映射類別。 dialer map protocol address name hostname class classname dial-string 設置接口支持PPP回撥 ppp callback accept 在全局模式下為PPP回撥設置映射類別 map-class dialer classname 通過查找注冊在dialer map里的主機名來決定回撥. dialer callback-server [username] 設置接口要求PPP回撥 ppp callback request
設置如下： Router1: hostname router1 user router2 password cisco ! isdn switch-type basic-net3 ! interface bri 0 ip address 192.200.10.1 255.255.255.0 encapsulation ppp dialer map ip 192.200.10.2 name router2 class s3 572 dialer load-threshold 80 ppp callback accept ppp multilink dialer-group 1 ppp authentication chap ！ map-class dialer s3 dialer callback-server username dialer-list 1 protocol ip permit ! Router2: hostname router2 user router1 password cisco ! isdn switch-type basic-net3 ! interface bri 0 ip address 192.200.10.2 255.255.255.0 encapsulation ppp dialer map ip 192.200.10.1 name router1 571 dialer load-threshold 80 ppp callback request ppp multilink dialer-group 1 ppp authentication chap ！ dialer-list 1 protocol ip permit ! 相關調試命令： debug dialer debug isdn event debug isdn q921 debug isdn q931 debug ppp authentication debug ppp error debug ppp negotiation debug ppp packet show dialer show isdn status 舉例:執行debug dialer命令觀察router2呼叫router1,router1回撥router2的過程. router1#debug dialer router2#ping 192.200.10.1 router1# 00:03:50: %LINK-3-UPDOWN: Interface BRI0:1, changed state to up 00:03:50: BRI0:1:PPP callback Callback server starting to router2 572 00:03:50: BRI0:1: disconnecting call 00:03:50: %LINK-3-UPDOWN: Interface BRI0:1, changed state to down 00:03:50: BRI0:1: disconnecting call 00:03:50: BRI0:1: disconnecting call 00:03:51: %LINK-3-UPDOWN: Interface BRI0:2, changed state to up 00:03:52: callback to router2 already started 00:03:52: BRI0:2: disconnecting call 00:03:52: %LINK-3-UPDOWN: Interface BRI0:2, changed state to down 00:03:52: BRI0:2: disconnecting call 00:03:52: BRI0:2: disconnecting call 00:04:05: : Callback timer eXPired 00:04:05: BRI0:beginning callback to router2 572 00:04:05: BRI0: Attempting to dial 572 00:04:05: Freeing callback to router2 572 00:04:05: %LINK-3-UPDOWN: Interface BRI0:1, changed state to up 00:04:05: BRI0:1: No callback negotiated 00:04:05: %LINK-3-UPDOWN: Interface Virtual-access1, changed state to up 00:04:05: dialer Protocol up for Vi1 00:04:06: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1, changed state to up 00:04:06: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Access1, chang ed state to up 00:04:11: %ISDN-6-CONNECT: Interface BRI0:1 is now connected to 572 #router1
4. ISDN訪問首都在線263網實例:
本地局部網地址為10.0.0.0/24,屬于保留地址，通過NAT地址翻譯功能，局域網用戶可以通過ISDN上263網訪問Internet。263的ISDN電話號碼為2633，用戶為263，口令為263，所涉及的命令如下表： 任務 命令 指定接口通過PPP/IPCP地址協商獲得IP地址 ip address negotiated 指定內部和外部端口 ip nat {inside outside} 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協議 dialer-list 1 protocol ip permit 設定撥號，號碼為2633 dialer string 2633 設定登錄263的用戶名和口令 ppp pap sent-username 263 password 263 設定默認路由 ip route 0.0.0.0 0.0.0.0 bri 0 設定符合訪問列表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 設定訪問列表2，答應所有協議 access-list 2 permit any
具體配置如下： 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
