使用撥號器監視配置BRI ISDN備份

下載選項

  • PDF     (354.7 KB)
    在多種裝置上使用 Adobe Reader 檢視
  • ePub     (92.8 KB)
    在 iPhone、iPad、Android、Sony Reader 或 Windows Phone 上的各種應用程式中檢視
  • Mobi (Kindle)     (116.7 KB)
    在 Kindle 裝置或多部裝置的 Kindle 應用程式上檢視
已更新: 2005 年 9 月 9 日
文件 ID:11048

無偏見用語

本產品的文件集力求使用無偏見用語。針對本文件集的目的，無偏見係定義為未根據年齡、身心障礙、性別、種族身分、民族身分、性別傾向、社會經濟地位及交織性表示歧視的用語。由於本產品軟體使用者介面中硬式編碼的語言、根據 RFP 文件使用的語言，或引用第三方產品的語言，因此本文件中可能會出現例外狀況。深入瞭解思科如何使用包容性用語。

關於此翻譯

思科已使用電腦和人工技術翻譯本文件，讓全世界的使用者能夠以自己的語言理解支援內容。請注意，即使是最佳機器翻譯，也不如專業譯者翻譯的內容準確。Cisco Systems, Inc. 對這些翻譯的準確度概不負責，並建議一律查看原始英文文件（提供連結）。

簡介

本檔案將說明使用ISDN基本速率介面(BRI)線路使用撥號器監控功能備份租用線路、WAN或序列連線。有關撥號器監視的功能和操作的詳細資訊，請參閱評估備份介面、浮動靜態路由和適用於DDR備份的撥號器監視。

開始之前

慣例

如需文件慣例的詳細資訊，請參閱思科技術提示慣例。

必要條件

配置DDR備份包括兩個不同的步驟：

  1. 使用傳統DDR或撥號程式配置檔案配置DDR。在實施備份配置之前，請驗證DDR連線是否正常工作。這允許您在配置備份之前驗證使用的撥號方法、點對點協定(PPP)協商和身份驗證是否成功。

  2. 配置路由器，在主鏈路出現故障時啟動備份DDR連線。此配置使用撥號器監視功能來觸發撥出。

有關配置備份所需步驟的詳細資訊，請參閱配置和故障排除DDR備份文檔。

採用元件

本檔案中的資訊是根據以下軟體和硬體版本。

  • 兩台運行Cisco IOS??的Cisco 2500路由器（幀中繼DTE）軟體版本12.2(3)和12.2(5)。

  • 一台Cisco 4500路由器，用作幀中繼交換機（未顯示配置）。

本文中的資訊是根據特定實驗室環境內的裝置所建立。文中使用到的所有裝置皆從已清除（預設）的組態來啟動。如果您在即時網路中工作，請確保在使用任何命令之前瞭解其潛在影響。

背景理論

此示例使用撥號器配置檔案作為備份BRI鏈路。您還可以使用傳統按需撥號路由(DDR)，它使用dialer map命令進行備份BRI連線。有關使用撥號器對映配置撥號器監視的詳細資訊，請參閱使用BRI和撥號器監視配置DDR備份。

設定

本節提供用於設定本文件中所述功能的資訊。

注意：要查詢有關本文檔中使用的命令的其他資訊，請使用命令查詢工具

網路圖表

本文檔使用下圖所示的網路設定。

bri_isdn_11048.gif

組態

本文檔使用如下所示的配置。

krimson（思科2500路由器） 
krimson#show running-config
 Building configuration...

 Current configuration : 5055 bytes
 !
 version 12.2
 service timestamps debug datetime msec
 service timestamps log datetime msec
 no service password-encryption
 !
 hostname krimson
 !
 logging buffered 500000 debugging
 no logging console
 enable password <deleted>
 !
 username kevin password 0 <deleted>
 ip subnet-zero
 no ip domain-lookup
 !
 isdn switch-type basic-net3
 !
 interface Ethernet0
  ip address 10.200.16.30 255.255.255.0
  no ip route-cache
  no ip mroute-cache
  no cdp enable
          
 ! <<- Unused interface configuration omitted
 !
 interface Serial1
 
!--- Primary Link (Frame Relay)

  bandwidth 64
  no ip address
  encapsulation frame-relay
  no ip route-cache
  no ip mroute-cache
 !
 interface Serial1.1 point-to-point
 
!--- Point-to-point Frame Relay subinterface

  ip address 10.5.5.2 255.255.255.0
  no ip route-cache
  frame-relay interface-dlci 20 
 !
 interface BRI0
 
!--- Backup physical interface

   description Backup ISDN, Nr. 4420038
   no ip address
   encapsulation ppp
   no ip route-cache
   no ip mroute-cache
   load-interval 30
   no keepalive
   dialer pool-member 1
 
!--- BRI 0 is a member of dialer pool 1

   isdn switch-type basic-net3
   no fair-queue
   no cdp enable
   ppp authentication chap
 !
 interface Dialer0
 
!--- Logical interface for the backup

   ip address 10.9.9.1 255.255.255.0
 
!--- The dialer is in the same network as the remote dialer interface

   encapsulation ppp
   no ip route-cache
   no ip mroute-cache
   dialer pool 1
 
!--- Dialer pool 1. BRI 0 is a member of this pool

   dialer remote-name kevin
 
!--- Authenticated remote name of the peer. !--- Verify that this name exactly matches the authenticated name !--- of the remote dialer

   dialer string 6120
 
!--- Number for outbound call. For inbound calls this is not needed

   dialer watch-group 1
 
!--- Enable dialer watch on this backup interface. !--- Watch the route specified with dialer watch-list 1 

   dialer-group 1
 
!--- Apply interesting traffic defined in dialer-list 1 

   no cdp enable
   ppp authentication chap
 !
 !
 router ospf 10
   log-adjacency-changes
   network 10.5.5.0 0.0.0.255 area 0
   network 10.7.7.0 0.0.0.255 area 0
   network 10.9.9.0 0.0.0.255 area 0
 !
 no ip classless
 ip route 0.0.0.0 0.0.0.0 10.200.16.1
 
!--- Default route through ethernet 0

 no ip http server
 !
 access-list 101 deny ospf any any
 
!--- Mark OSPF as uninteresting. !--- This will prevent OSPF hellos from keeping the link up

 access-list 101 permit ip any any
 
!--- All other IP traffic is interesting


 dialer watch-list 1 ip 10.8.8.0 255.255.255.0
 
!--- This defines the route(s) to be watched. !--- This exact route(including subnet mask) must exist in the routing table. !--- Use the dialer watch-group 1 command to apply this list to the backup !--- interface (interface dialer 0)

 dialer-list 1 protocol ip list 101
 
!--- Interesting traffic is defined by access-list 101. !--- This is applied to BRI0 using dialer-group 1 

 !
 line con 0
   exec-timeout 0 0
   privilege level 15
 line aux 0
   transport input all
 line vty 0 4
   exec-timeout 0 0
   password <deleted>
   login
  !
 end

kevin(2500) 
kevin#show running-config
 version 12.2
 service timestamps debug datetime msec
 service timestamps log datetime msec
 !
 hostname kevin
 !
 username krimson password 0 <password>
 !
 isdn switch-type basic-net3
 !
 !
 interface Loopback0
  ip address 10.8.8.1 255.255.255.0
 
!--- This is the network the remote side is watching

  ip ospf network point-to-point
 !
 interface Loopback1
  ip address 172.19.0.1 255.255.255.255
 !
 interface Ethernet0
  ip address 10.200.17.26 255.255.255.0
 !
 interface Serial0
  no ip address
  encapsulation frame-relay
 !
 interface Serial0.1 point-to-point
 
!--- Primary link (Frame Relay sub-interface)

  ip address 10.5.5.1 255.255.255.0
  frame-relay interface-dlci 20 
 !
 interface BRI0
 
!--- Physical interface

  no ip address
  encapsulation ppp
  dialer pool-member 1
 
!--- Member of dialer pool 1

  isdn switch-type basic-net3
  no cdp enable
  ppp authentication chap
 !
 interface Dialer0
 
!--- Logical interface for incoming call

 ip address 10.9.9.2 255.255.255.0
 
!--- The dialer is in the same network as the remote dialer interface

 encapsulation ppp
 dialer pool 1
 
!--- Dialer pool 1. BRI 0 is a member of this pool

 dialer remote-name krimson
 
!--- Authenticated remote name of the peer. !--- Verify that this name exactly matches the authenticated name !--- of the remote dialer.

 dialer-group 1
 
!--- Apply interesting traffic defined in dialer-list 1

 no cdp enable
 ppp authentication chap
 !
 router ospf 10
  log-adjacency-changes
  network 10.5.5.0 0.0.0.255 area 0
  network 10.8.8.0 0.0.0.255 area 0
 
!--- Advertise the network the remote router is watching

  network 10.9.9.0 0.0.0.255 area 0
 !
 ip classless
 ip route 0.0.0.0 0.0.0.0 10.200.17.1
 no ip http server
 !
 dialer-list 1 protocol ip permit
 
!--- Interesting traffic definition. All IP traffic is interesting. !--- This is applied to BRI0 using dialer-group 1. !--- Since the remote router activates and deactivates the backup, this router !--- does not need to restrict interesting traffic

 no cdp run
 !
 line con 0
  exec-timeout 0 0
 line aux 0
  modem InOut
 line vty 0 4
  exec-timeout 0 0
  password <password>
  login
 !
 end

附註：  maui-nas-05的配置不包含任何與備份相關的命令。對於maui-nas-05，備份鏈路只是另一個撥入客戶端。當許多裝置建立到同一個中心站點的備份鏈路時，這可以簡化中心站點的配置。在備份方案中，理想的做法是隻讓一端發起撥號，而另一端只接受呼叫。

撥號器監視命令

以下是可用於撥號器監視的命令清單。其中一些命令已包括在上述配置中，而其他命令則提供以供參考。

  • dialer watch-list group-number ip ip-address address-mask :定義要監視的IP地址或網路。配置的地址或網路（使用正確的掩碼）必須存在於路由表中。您也可以使用dialer watch-list指令觀察多個路由。範例如下： 

    dialer watch-list 1 ip 10.1.1.0 255.255.255.0
dialer watch-list 1 ip 10.1.2.0 255.255.255.0
dialer watch-list 1 ip 10.1.3.0 255.255.255.0

  • dialer watch-group group-number :在備份介面上啟用撥號器監視。此處使用的group number與定義要監視的路由的dialer watch-list命令的group number匹配。只能在一個介面上配置帶有特定組號的dialer watch-group命令。這表示路由器不能使用多個介面為特定路由提供備份。但是，一個介面可以包含多個dialer watch-group命令，並且帶有不同的group-number。因此，一個介面可用於為多個路由提供備份。

  • dialer watch-disable seconds :為介面套用停用延遲時間。主介面恢復後，此延遲可防止在指定時間段內斷開備份介面。當空閒計時器過期時，此延遲計時器啟動，並且檢查主路由的狀態並發現其為up。此延遲可確保穩定性，尤其是對於擺動介面或經常發生路由更改的介面。

  • dialer watch-list group-number delay route-check initial seconds :此命令使路由器能夠檢查在路由器初始啟動完成且計時器（以秒為單位）過期後，主路由是否已啟動。如果沒有此命令，則僅當從路由表中刪除主路由時，才會觸發撥號器監視。如果主鏈路在路由器初始啟動時無法啟動，則路由絕不會新增到路由表中，因此無法進行監控。因此，使用此命令， dialer watch會在路由器初始啟動期間出現主鏈路故障時撥打備用鏈路。

驗證

本節提供的資訊可用於確認您的組態是否正常運作。

輸出直譯器工具支援某些show命令，該工具允許您檢視show命令輸出的分析。

  • show interfaces serial — 顯示有關組播資料鏈路連線識別符號(DLCI)、介面上使用的DLCI以及本地管理介面(LMI)使用的DLCI的資訊。 使用此命令驗證主介面是處於開啟還是關閉狀態。

  • show interface dialer — 顯示撥號器介面的狀態。

  • show ip route — 顯示IP路由表條目。檢驗路由表中是否存在受監控的網路（當主鏈路處於開啟狀態時）。 當主鏈路斷開並撥打備用號碼時，路由表應重新收斂，受監控的網路應重新出現（下一跳作為撥號器介面）。

疑難排解

本節提供的資訊可用於對組態進行疑難排解。

此處使用的幀中繼配置(使用點對點子介面並使用開放最短路徑優先(OSPF)作為路由協定)特定於此設定。但是，無論使用哪種路由協定，下面給出的故障排除步驟都比較籠統，可用於不同的配置，如採用高級資料鏈路控制(HDLC)和點對點協定(PPP)封裝的幀中繼點對多點或主鏈路。

為了檢驗備份功能，我們將充當幀中繼交換機的Cisco 4500路由器上的一個介面置於關閉狀態，以模擬幀中繼網路中的問題。因此，這會導致PVC非活動狀態通過幀中繼網路傳給DTE路由器，並引發幀中繼子介面關閉事件。受監控的路由隨後消失，備用鏈路被啟用。

有關Dialer Watch故障排除的資訊，請參閱DDR備份配置和故障排除文檔。

疑難排解指令

輸出直譯器工具支援某些show命令，該工具允許您檢視show命令輸出的分析。

注意：發出debug指令之前，請先參閱有關Debug指令的重要資訊。

  • debug isdn q931 — 顯示有關本地路由器（使用者端）與網路之間的ISDN網路連線（第3層）的呼叫建立和拆除的資訊。

  • debug backup -調試備份事件。

  • debug dialer — 顯示有關撥號器介面上的資料包或事件的調試資訊。

  • debug ppp negotiation — 使debug ppp命令顯示PPP啟動期間傳輸的PPP資料包，其中會協商PPP選項。

  • debug ppp authentication — 使debug ppp命令顯示身份驗證協定消息，包括質詢身份驗證協定(CHAP)資料包交換和口令身份驗證協定(PAP)交換。

  • debug ip ospf events — 顯示有關OSPF相關事件的資訊，例如鄰接關係、泛洪資訊、指定路由器選擇和最短路徑優先(SPF)計算。

  • debug frame-relay events — 顯示有關支援組播通道和使用動態定址的網路上的幀中繼地址解析協定(ARP)應答的調試資訊。

故障排除輸出示例

在下面的輸出中，幀中繼介面為up。 

krimson#show ip route
   Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
       * - candidate default, U - per-user static route, o - ODR
       P - periodic downloaded static route

   Gateway of last resort is 10.200.16.1 to network 0.0.0.0

   10.0.0.0/24 is subnetted, 6 subnets
   C 10.5.5.0 is directly connected, Serial1.1
   O 10.8.8.0 [110/1563] via 10.5.5.1, 00:01:31, Serial1.1 
   
!--- Initial state through the primary Frame Relay interface, !--- before line failure occurred

   C 10.9.9.0 is directly connected, Dialer0
   C 10.7.7.0 is directly connected, Loopback0
   C 10.200.16.0 is directly connected, Ethernet0
   S* 0.0.0.0/0 [1/0] via 10.200.16.1

   krimson#
   *Apr 17 01:00:50.591: OSPF: Rcv hello from 172.19.0.1 area 0 
   from Serial1.1 10.5.5.1
   *Apr 17 01:00:50.595: OSPF: End of hello processing
   *Apr 17 01:00:51.127: %SYS-5-CONFIG_I: Configured from console by console
   *Apr 17 01:01:00.591: OSPF: Rcv hello from 172.19.0.1 area 0 from Serial1.1    
   10.5.5.1
   *Apr 17 01:01:00.595: OSPF: End of hello processing
   *Apr 17 01:01:05.243: %LINK-3-UPDOWN: Interface Serial1, changed state to down    
   
!--- Frame Relay failure simulated by shutting down the interface on !--- the Cisco 4500 router(acting as switch)

   *Apr 17 01:01:05.251: OSPF: Interface Serial1.1 going Down
   *Apr 17 01:01:05.255: %OSPF-5-ADJCHG: Process 10, Nbr 172.19.0.1 on Serial1.1    
   from FULL to DOWN, Neighbor Down: Interface down or detached
   *Apr 17 01:01:05.399: DDR: Dialer Watch: watch-group = 1
   *Apr 17 01:01:05.403: DDR: network 10.8.8.0/255.255.255.0 DOWN,
   
!--- Watched network is down

   *Apr 17 01:01:05.407: DDR: primary DOWN
   *Apr 17 01:01:05.407: DDR: Dialer Watch: Dial Reason: Primary of group 1 DOWN
   *Apr 17 01:01:05.411: DDR: Dialer Watch: watch-group = 1, 
   *Apr 17 01:01:05.411: BR0 DDR: rotor dialout [priority]
   *Apr 17 01:01:05.411: DDR: dialing secondary by dialer string 6120 on Di0
   
!--- router dials 6120 on interface Dialer 1

   *Apr 17 01:01:05.415: BR0 DDR: Attempting to dial 6120
   *Apr 17 01:01:05.523: ISDN BR0: TX -> SETUP pd = 8 callref = 0x43
   *Apr 17 01:01:05.531: Bearer Capability i = 0x8890
   *Apr 17 01:01:05.535: Channel ID i = 0x83
   *Apr 17 01:01:05.543: Called Party Number i = 0x80, '6120', Plan:Unknown, 
   Type:Unknown
   *Apr 17 01:01:05.599: ISDN BR0: RX <- CALL_PROC pd = 8 callref = 0xC3
   *Apr 17 01:01:05.603: Channel ID i = 0x89
   *Apr 17 01:01:05.855: ISDN BR0: RX <- CONNECT pd = 8 callref = 0xC3
   *Apr 17 01:01:05.875: %LINK-3-UPDOWN: Interface BRI0:1, changed state to up
   *Apr 17 01:01:05.875: BR0:1 DDR: Dialer Watch: resetting call in progress
   *Apr 17 01:01:05.883: %DIALER-6-BIND: Interface BR0:1 bound to profile Di0
   *Apr 17 01:01:05.891: BR0:1 PPP: Treating connection as a callout
   *Apr 17 01:01:05.895: BR0:1 PPP: Phase is ESTABLISHING, Active Open 
   [0 sess, 0 load]
   *Apr 17 01:01:05.899: BR0:1 LCP: O CONFREQ [Closed] id 54 len 15
   *Apr 17 01:01:05.903: BR0:1 LCP: AuthProto CHAP (0x0305C22305)
   *Apr 17 01:01:05.903: BR0:1 LCP: MagicNumber 0xF24F182E (0x0506F24F182E)
   *Apr 17 01:01:05.911: ISDN BR0: TX -> CONNECT_ACK pd = 8 callref = 0x43
   *Apr 17 01:01:05.939: BR0:1 LCP: I CONFREQ [REQsent] id 88 len 15
   *Apr 17 01:01:05.943: BR0:1 LCP: AuthProto CHAP (0x0305C22305)
   *Apr 17 01:01:05.943: BR0:1 LCP: MagicNumber 0x9B15A6B0 (0x05069B15A6B0)
   *Apr 17 01:01:05.947: BR0:1 LCP: O CONFACK [REQsent] id 88 len 15
   *Apr 17 01:01:05.951: BR0:1 LCP: AuthProto CHAP (0x0305C22305)
   *Apr 17 01:01:05.955: BR0:1 LCP: MagicNumber 0x9B15A6B0 (0x05069B15A6B0)
   *Apr 17 01:01:05.959: BR0:1 LCP: I CONFACK [ACKsent] id 54 len 15
   *Apr 17 01:01:05.963: BR0:1 LCP: AuthProto CHAP (0x0305C22305)
   *Apr 17 01:01:05.963: BR0:1 LCP: MagicNumber 0xF24F182E (0x0506F24F182E)
   *Apr 17 01:01:05.967: BR0:1 LCP: State is Open
   *Apr 17 01:01:05.967: BR0:1 PPP: Phase is AUTHENTICATING, by both 
   [0 sess, 0 load]
   *Apr 17 01:01:05.971: BR0:1 CHAP: O CHALLENGE id 54 len 28 from "krimson"
   *Apr 17 01:01:06.051: BR0:1 CHAP: I CHALLENGE id 56 len 26 from "kevin"
   *Apr 17 01:01:06.055: BR0:1 CHAP: O RESPONSE id 56 len 28 from "krimson"
   *Apr 17 01:01:06.151: BR0:1 CHAP: I SUCCESS id 56 len 4
   *Apr 17 01:01:06.167: BR0:1 CHAP: I RESPONSE id 54 len 26 from "kevin"
   *Apr 17 01:01:06.175: BR0:1 CHAP: O SUCCESS id 54 len 4
   *Apr 17 01:01:06.179: BR0:1 PPP: Phase is UP [0 sess, 0 load]
   *Apr 17 01:01:06.183: BR0:1 IPCP: O CONFREQ [Not negotiated] id 46 len 10
   *Apr 17 01:01:06.187: BR0:1 IPCP: Address 10.9.9.1 (0x03060A090901)
   *Apr 17 01:01:06.279: BR0:1 IPCP: I CONFREQ [REQsent] id 34 len 10
   *Apr 17 01:01:06.283: BR0:1 IPCP: Address 10.9.9.2 (0x03060A090902)
   *Apr 17 01:01:06.287: BR0:1 IPCP: O CONFACK [REQsent] id 34 len 10
   *Apr 17 01:01:06.291: BR0:1 IPCP: Address 10.9.9.2 (0x03060A090902)
   *Apr 17 01:01:06.295: BR0:1 IPCP: I CONFACK [ACKsent] id 46 len 10
   *Apr 17 01:01:06.299: BR0:1 IPCP: Address 10.9.9.1 (0x03060A090901)
   *Apr 17 01:01:06.303: BR0:1 IPCP: State is Open
   *Apr 17 01:01:06.315: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1,    
   changed state to down
   *Apr 17 01:01:06.319: BR0:1 DDR: dialer protocol up
   *Apr 17 01:01:06.327: Di0 IPCP: Install route to 10.9.9.2
   *Apr 17 01:01:07.175: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1,    
   changed state to up
   
!--- Call connects

   *Apr 17 01:01:10.775: OSPF: Rcv hello from 172.19.0.1 area 0 from Dialer0 10.9.9.2
   
!--- OSPF hello from the peer

   *Apr 17 01:01:10.779: OSPF: End of hello processing
   *Apr 17 01:01:11.891: %ISDN-6-CONNECT: Interface BRI0:1 is now connected to 6120 
   
   kevin#show interface serial 1.1
   Serial1.1 is down, line protocol is down 
   
!--- Primary link is still down

   Hardware is HD64570
   Internet address is 10.5.5.2/24
   MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec, 
   reliability 255/255, txload 1/255, rxload 1/255
   Encapsulation FRAME-RELAY
   
   krimson#show interface dialer 0 
   
!--- Backup interface is up and active

   Dialer0 is up, line protocol is up (spoofing)
   Hardware is Unknown
   Internet address is 10.9.9.1/24
   MTU 1500 bytes, BW 56 Kbit, DLY 20000 usec, 
   reliability 255/255, txload 1/255, rxload 1/255
   Encapsulation PPP, loopback not set
   DTR is pulsed for 1 seconds on reset
   Interface is bound to BR0:1
   Last input 1w6d, output never, output hang never
   Last clearing of "show interface" counters 6w5d
   Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
   Queueing strategy: weighted fair
   Output queue: 0/1000/64/0 (size/max total/threshold/drops) 
   Conversations 0/1/16 (active/max active/max total)
   Reserved Conversations 0/0 (allocated/max allocated)
   Available Bandwidth 42 kilobits/sec
   5 minute input rate 0 bits/sec, 0 packets/sec
   5 minute output rate 0 bits/sec, 0 packets/sec
   882 packets input, 69656 bytes
   892 packets output, 70436 bytes
   Bound to:
   BRI0:1 is up, line protocol is up 
   Hardware is BRI
   MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec, 
   
   reliability 255/255, txload 1/255, rxload 1/255
   Encapsulation PPP, loopback not set
   Keepalive not set
   DTR is pulsed for 1 seconds on reset
   Time to interface disconnect: idle 00:01:38
   Interface is bound to Di0 (Encapsulation PPP)
   LCP Open
   Open: IPCP
   Last input 00:00:03, output 00:00:01, output hang never
   Last clearing of "show interface" counters never
   Queueing strategy: fifo
   Output queue 0/40, 0 drops; input queue 0/75, 0 drops
   30 second input rate 0 bits/sec, 0 packets/sec
   30 second output rate 0 bits/sec, 0 packets/sec
   4213 packets input, 414529 bytes, 0 no buffer
   Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
   29 input errors, 18 CRC, 0 frame, 0 overrun, 0 ignored, 11 abort
   3922 packets output, 242959 bytes, 0 underruns
   0 output errors, 0 collisions, 27 interface resets
   0 output buffer failures, 0 output buffers swapped out
   622 carrier transitions
   
   krimson#show ip route
   Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
   D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
   N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
   E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
   i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
   * - candidate default, U - per-user static route, o - ODR
   P - periodic downloaded static route

   Gateway of last resort is 10.200.16.1 to network 0.0.0.0

   192.168.64.0/30 is subnetted, 1 subnets
   C 192.168.64.0 is directly connected, Dialer4
   10.0.0.0/8 is variably subnetted, 6 subnets, 2 masks
   C 10.9.9.2/32 is directly connected, Dialer0
   O 10.8.8.0/24 [110/1786] via 10.9.9.2, 00:00:25, Dialer0 
   
!--- New route to the same destination (through dialer 0). !--- Network now points to backup interface

   C 10.9.9.0/24 is directly connected, Dialer0
   C 10.7.7.0/24 is directly connected, Loopback0
   C 10.9.8.0/24 is directly connected, Dialer1
   C 10.200.16.0/24 is directly connected, Ethernet0
   S* 0.0.0.0/0 [1/0] via 10.200.16.1

在下面的輸出中，幀中繼介面正在啟動。

*Apr 17 01:02:50.631: %LINEPROTO-5-UPDOWN: Line protocol 
   on Interface Serial1,
    changed state to up 
   
!--- Primary is UP again

   *Apr 17 01:02:50.975: OSPF: Rcv hello from 172.19.0.1 area 0 
   from Dialer0 10.9.9.2
   *Apr 17 01:02:50.979: OSPF: End of hello processing

   *Apr 17 01:03:00.975: OSPF: Rcv hello from 172.19.0.1 area 0 
   from Dialer0 10.9.9.2
   *Apr 17 01:03:00.979: OSPF: End of hello processing
   *Apr 17 01:03:05.887: BR0:1 DDR: idle timeout
   *Apr 17 01:03:05.887: DDR: Dialer Watch: watch-group = 1
   *Apr 17 01:03:05.887: DDR: network 10.8.8.0/255.255.255.0 UP, 
   
!--- Watched route is UP

   *Apr 17 01:03:05.891: DDR: primary DOWN
   *Apr 17 01:03:10.551: OSPF: Rcv hello from 172.19.0.1 area 0 
   from Serial1.1
    10.5.5.1
   *Apr 17 01:03:10.555: OSPF: End of hello processing
   *Apr 17 01:03:10.975: OSPF: Rcv hello from 172.19.0.1 area 0 
   from Dialer0 10.9.9.2
   *Apr 17 01:03:10.979: OSPF: End of hello processing
   
   krimson#show ip route
   Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
   D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
   N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
   E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
   i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
   * - candidate default, U - per-user static route, o - ODR
   P - periodic downloaded static route

   Gateway of last resort is 10.200.16.1 to network 0.0.0.0

   10.0.0.0/8 is variably subnetted, 7 subnets, 2 masks
   C 10.9.9.2/32 is directly connected, Dialer0
   C 10.5.5.0/24 is directly connected, Serial1.1
   O 10.8.8.0/24 [110/1563] via 10.5.5.1, 00:00:01, Serial1.1 
   
! -- Route entry to destination network via primary has been installed again.

   C 10.9.9.0/24 is directly connected, Dialer0
   C 10.7.7.0/24 is directly connected, Loopback0
   C 10.9.8.0/24 is directly connected, Dialer1
   C 10.200.16.0/24 is directly connected, Ethernet0
   S* 0.0.0.0/0 [1/0] via 10.200.16.1

   krimson#show isdn active
   --------------------------------------------------------------------------------
   ISDN ACTIVE CALLS
   --------------------------------------------------------------------------------
   Call  Calling Called Remote Seconds Seconds Seconds Charges
   Type  Number  Number Name   Used    Left    Idle    Units/Currency
   --------------------------------------------------------------------------------
   Out   6120           kevin  149     90      29      0 
   --------------------------------------------------------------------------------

Seconds idle欄位指出沒有更多流量通過備份介面，並且空閒時間正在增加。

krimson# show isdn active
   --------------------------------------------------------------------------------
   ISDN ACTIVE CALLS
   --------------------------------------------------------------------------------
   Call Calling Called Remote Seconds Seconds Seconds Charges
   Type Number  Number Name   Used    Left    Idle    Units/Currency
   --------------------------------------------------------------------------------
   Out          6120   kevin  165      74      45      0 
   --------------------------------------------------------------------------------
   
   krimson# show isdn active
   --------------------------------------------------------------------------------
   ISDN ACTIVE CALLS
   --------------------------------------------------------------------------------
   Call Calling Called Remote Seconds Seconds Seconds  Charges
   Type Number  Number Name   Used    Left    Idle     Units/Currency
   --------------------------------------------------------------------------------
   Out          6120   kevin   224    15      104       0 
   --------------------------------------------------------------------------------

   krimson#show isdn active
   --------------------------------------------------------------------------------
   ISDN ACTIVE CALLS
   --------------------------------------------------------------------------------
   Call Calling Called Remote Seconds Seconds Seconds Charges
   Type Number Number Name Used Left Idle Units/Currency
   --------------------------------------------------------------------------------
   --------------------------------------------------------------------------------

   krimson#show ip route
   Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
   D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
   N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
   E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
   i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
   * - candidate default, U - per-user static route, o - ODR
   P - periodic downloaded static route

   Gateway of last resort is 10.200.16.1 to network 0.0.0.0

   192.168.64.0/30 is subnetted, 1 subnets
   C 192.168.64.0 is directly connected, Dialer4
   10.0.0.0/24 is subnetted, 6 subnets
   C 10.5.5.0 is directly connected, Serial1.1
   O 10.8.8.0 [110/1563] via 10.5.5.1, 00:01:52, Serial1.1
   C 10.9.9.0 is directly connected, Dialer0
   C 10.7.7.0 is directly connected, Loopback0
   C 10.9.8.0 is directly connected, Dialer1
   C 10.200.16.0 is directly connected, Ethernet0
   S* 0.0.0.0/0 [1/0] via 10.200.16.1

相關資訊

修訂記錄

修訂 發佈日期 意見
1.0
09-Sep-2005
初始版本

貢獻者

  • npanicke
    裸眼蝶屬

這份文件是否有所幫助？

Feedback意見

讓思科協助您

本文件適用於這些產品