【導(dǎo)讀】1．Console口接終端或運(yùn)行終端仿真軟件的微機(jī)；2．AUX口接MODEM，通過電話線與遠(yuǎn)方的終端或運(yùn)行終端仿真軟件的微機(jī)相連；3．通過Ether上的TFTP服務(wù)器；4．通過Ether上的TELNET程序；5．通過Ether上的SNMP網(wǎng)管工作站。有的用戶命令，還可以看到和更改路由器的設(shè)置內(nèi)容。在router#提示符下鍵入configureterminal,出現(xiàn)提示符router#，此時(shí)路由器。處于全局設(shè)置狀態(tài)，這時(shí)可以設(shè)置路由器的全局參數(shù)。完成正常的功能，只能進(jìn)行軟件升級和手工引導(dǎo)。態(tài)，這時(shí)可通過對話方式對路由器進(jìn)行設(shè)置。得到系統(tǒng)的幫助，按ctrl-c可。以退出設(shè)置過程，缺省設(shè)置將顯示在‘[]’中。

　　

【正文】 otocol address name hostname class classname dialstring 設(shè)置接口支持 PPP 回?fù)? ppp callback accept 在全局模式下為 PPP 回?fù)茉O(shè)置映射類別 mapclass dialer classname 通過查找注冊在 dialer map dialer callbackserver [username] Cisco 路由器配置手冊 24/61 里的主機(jī)名來決定回?fù)?. 設(shè)置接口要求 PPP 回?fù)? ppp callback request 設(shè)置如下： Router1: hostname router1 user router2 password cisco ! isdn switchtype basic3 ! interface bri 0 ip address encapsulation ppp dialer map ip name router2 class s3 572 dialer loadthreshold 80 ppp callback accept ppp multilink dialergroup 1 ppp authentication chap ！ mapclass dialer s3 dialer callbackserver username dialerlist 1 protocol ip permit ! Router2: hostname router2 user router1 password cisco ! isdn switchtype basic3 ! interface bri 0 ip address encapsulation ppp dialer map ip name router1 571 dialer loadthreshold 80 ppp callback request ppp multilink dialergroup 1 ppp authentication chap ！ dialerlist 1 protocol ip permit ! 相關(guān)調(diào)試命令： debug dialer Cisco 路由器配置手冊 25/61 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(zhí)行 debug dialer 命令觀察 router2 呼叫 router1,router1 回?fù)?router2的過程 . router1debug dialer router2ping router1 00:03:50: %LINK3UPDOWN: 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: %LINK3UPDOWN: Interface BRI0:1, changed state to down 00:03:50: BRI0:1: disconnecting call 00:03:50: BRI0:1: disconnecting call 00:03:51: %LINK3UPDOWN: 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: %LINK3UPDOWN: 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: %LINK3UPDOWN: Interface BRI0:1, changed state to up 00:04:05: BRI0:1: No callback negotiated 00:04:05: %LINK3UPDOWN: Interface VirtualAccess1, changed state to up 00:04:05: dialer Protocol up for Vi1 00:04:06: %LINEPROTO5UPDOWN: Line protocol on Interface BRI0:1, changed state to up 00:04:06: %LINEPROTO5UPDOWN: Line protocol on Interface VirtualAccess1, chang ed state to up 00:04:11: %ISDN6CONNECT: Interface BRI0:1 is now connected to 572 router1 4. ISDN 訪問首都在線 263 網(wǎng)實(shí)例 : Cisco 路由器配置手冊 26/61 本地局部網(wǎng)地址為 ,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 Inter。 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(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 {inside | outside} 使用 ppp/pap 作認(rèn)證 ppp authentication pap callin 指定接口屬于撥號組 1 dialergroup 1 定義撥號組 1允許所有 IP協(xié)議 dialerlist 1 protocol ip permit 設(shè)定撥號，號碼為 2633 dialer string 2633 設(shè)定登錄 263 的用戶名和口令 ppp pap sentusername 263 password 263 設(shè)定默認(rèn)路由 ip route 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，允許所有協(xié)議 accesslist 2 permit any 具體配置如下： hostname Cisco2503 ! isdn switchtype basic3 ! ip subzero no ip domainlookup ip routing ! interface Ether 0 ip address ip nat inside Cisco 路由器配置手冊 27/61 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 dialergroup 1 dialer holdqueue 10 dialer string 2633 dialer idletimeout 120 ppp pap sentusername 263 password 263 no cdp enable no ip splithorizon no shutdown ! ip classless ! ! Static Routes ! ip route bri 0 ! ! Access Control List 2 ! accesslist 2 permit any ! dialerlist 1 protocol ip permit ! ! Dynamic NAT ! ip nat inside source list 2 interface bri 0 overload snmpserver munity public ro ! Cisco 路由器配置手冊 28/61 line console 0 exectimeout 0 0 ! line vty 0 4 ! end 5. Cisco765M 通過 ISDN 撥號上 263 由于 Cisco765 的設(shè)置命令與我們常用的 Cisco 路由器的命令不同，所以以下列舉了通過Cisco765 上 263 訪問 Inter 的具體命令行設(shè)置步驟。 set system c765 c765 set multidestination on c765 set switch 3 c765 set ppp multilink on c765 cd lan c765:LAN set ip routing on c765:LAN set ip address c765:LAN set ip mask c765:LAN set briding off c765:LANcd c765 set user remote New user remote being created c765:remote set ip routing on c765:remote set bridging off c765:remote set ip framing none c765:remote set ppp clientname 263 c765:remote set ppp password client Enter new Password: 263 ReType new Password: 263 c765:remote set ppp authentication out none c765:remote set ip address c765:remote set ip mask c765:remote set ppp address negotiation local on c765:remote set ip pat on c765:remote set ip route destination c765:remote set number 2633 c765:remote set active 命令描述如下： 任務(wù) 命令 設(shè)置路由器系統(tǒng)名稱 set system c765 允許路由器呼叫多個目的地 set multidestination on 設(shè)置 ISDN 交 換機(jī)類 型為NET3 set switch 3 允許點(diǎn)到點(diǎn)間多條通道連接 set ppp multilink on Cisco 路由器配置手冊 29/61 實(shí)現(xiàn)負(fù)載均衡 關(guān)掉橋接 set briding off 建立用戶預(yù)制文件用于設(shè)置撥號連接參數(shù) 可以設(shè)置多個用戶預(yù)制文件用于相同的物理端口對應(yīng)于不同的連接。 set user remote 使用 PPP/IPCP set ip framing none 設(shè)置上網(wǎng)用戶帳號 set ppp clientname 263 設(shè)置上網(wǎng)口令 set ppp password client Enter new Password: 263 ReType new Password: 263 不用 PPP/CHAP或 PAP做認(rèn)證 set ppp authe