ISDN 協(xié)議配置

1、ISDN協(xié)議配置刷鉆代碼 1.綜合數(shù)字業(yè)務(wù)網(wǎng)(ISDN綜合數(shù)字業(yè)務(wù)網(wǎng)(ISDN由數(shù)字電話和數(shù)據(jù)傳輸服務(wù)兩部分組成,一般由電話局提供這種服務(wù)。ISDN的基本速率接口(BRI服務(wù)提供2個(gè)B信道和1個(gè)D信道(2B+D。BRI的B信道速率為64Kbps,用于傳輸用戶數(shù)據(jù)。D信道的速率為16Kbps,主要傳輸控制信號(hào)。在北美和日本,ISDN 的主速率接口(PRI提供23個(gè)B信道和1個(gè)D信道,總速率可達(dá)1.544Mbps,其中D信道速率為64Kbps。而在歐洲、澳大利亞等國家,ISDN的PRI提供30個(gè)B信道和1個(gè)64Kbps D信道,總速率可達(dá)2.048Mbps。我國電話局所提供ISDN PRI為30B

2、+D。2.基本命令注:1.交換機(jī)類型如下表,國內(nèi)交換機(jī)一般為basic-net3。3. ISDN實(shí)現(xiàn)DDR(dial-on-demand routing實(shí)例:設(shè)置如下:Router1:hostname router1user router2 password cisco!isdn switch-type basic-net3!interface bri 0ip address 192.200.10.1 255.255.255.0encapsulation pppdialer map ip 192.200.10.2 name router2 572 dialer load-threshold 8

3、0ppp multilinkdialer-group 1ppp authentication chap!dialer-list 1 protocol ip permit!Router2:hostname router2user router1 password cisco!isdn switch-type basic-net3!interface bri 0ip address 192.200.10.2 255.255.255.0encapsulation pppdialer map ip 192.200.10.1 name router1 571 dialer load-threshold

4、80ppp multilinkdialer-group 1ppp authentication chap!dialer-list 1 protocol ip permit!Cisco路由器同時(shí)支持回?fù)芄δ?我們將路由器Router1作為Callback Server,Router2作為Callback Client。與回?fù)芟嚓P(guān)命令:設(shè)置如下:Router1:hostname router1user router2 password cisco!isdn switch-type basic-net3!interface bri 0ip address 192.200.10.1255.255.25

5、5.0encapsulation pppdialer map ip 192.200.10.2 name router2 class s3 572dialer load-threshold 80ppp callback acceptppp multilinkdialer-group 1ppp authentication chap!map-class dialer s3dialer callback-server usernamedialer-list 1 protocol ip permit!Router2:hostname router2user router1 password cisco

6、!isdn switch-type basic-net3!interface bri 0ip address 192.200.10.2 255.255.255.0 encapsulation pppdialer map ip 192.200.10.1 name router1 571 dialer load-threshold 80ppp callback requestppp multilinkdialer-group 1ppp authentication chap!dialer-list 1 protocol ip permit!相關(guān)調(diào)試命令:debug dialerdebug isdn

7、 eventdebug isdn q921debug isdn q931debug ppp authenticationdebug ppp errordebug ppp negotiationdebug ppp packetshow dialershow isdn status舉例:執(zhí)行debug dialer命令觀察router2呼叫router1,router1回?fù)躵outer2的過程.router1#debug dialerrouter2#ping 192.200.10.1router1#00:03:50: %LINK-3-UPDOWN: Interface BRI0:1, change

8、d state to up00:03:50: BRI0:1:PPP callback Callback server starting to router2 57200:03:50: BRI0:1: disconnecting call00:03:50: %LINK-3-UPDOWN: Interface BRI0:1, changed state to down00:03:50: BRI0:1: disconnecting call00:03:50: BRI0:1: disconnecting call00:03:51: %LINK-3-UPDOWN: Interface BRI0:2,ch

9、anged state to up00:03:52: callback to router2 already started00:03:52: BRI0:2: disconnecting call00:03:52: %LINK-3-UPDOWN: Interface BRI0:2, changed state to down00:03:52: BRI0:2: disconnecting call00:03:52: BRI0:2: disconnecting call00:04:05: : Callback timer expired00:04:05: BRI0:beginning callba

10、ck to router2 57200:04:05: BRI0: Attempting to dial 57200:04:05: Freeing callback to router2 57200:04:05: %LINK-3-UPDOWN: Interface BRI0:1, changed state to up00:04:05: BRI0:1: No callback negotiated00:04:05: %LINK-3-UPDOWN: Interface Virtual-Access1, changed state to up00:04:05: dialer Protocol up

11、for Vi100:04:06: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1, changed stateto up00:04:06: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Access1, changed state to up00:04:11: %ISDN-6-CONNECT: Interface BRI0:1 is now connected to 572#router14. ISDN訪問首都在線263網(wǎng)實(shí)例:本地局部網(wǎng)地址為10.0.0.0/24,

12、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(hào)碼為2633,用戶為263,口令為263,所涉及的命令如下表:具體配置如下:hostname Cisco2503!isdn switch-type basic-net3!ip subnet-zerono ip domain-lookupip routing!interface Ethernet 0ip address 10.0.0.1 255.255.255.0 ip nat insideno shutdown!interface Serial 0shutdownno des

13、criptionno ip address!interface Serial 1shutdownno 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 !