本文檔提供了ISDN備份的配置示例,並提供了此類配置的基本故障排除資訊。
有關最常見的ISDN備份實現資訊以及它們之間的比較,請參閱以下文檔:評估備份介面、浮動靜態路由和撥號器監視DDR備份。
本文件沒有特定先決條件。
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®軟體版本12.2(3)和12.2(5)的Cisco 2500路由器(幀中繼資料終端裝置[DTE])。
一台用作幀中繼交換機的Cisco 4500路由器。
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。
如需文件慣例的詳細資訊,請參閱思科技術提示慣例。
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(僅限註冊客戶)。
本文檔使用下圖所示的網路設定。
本文檔使用如下所示的配置。
krimson(思科2500路由器) |
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krimson#show running-config Building configuration... ! version 12.2 service timestamps debug datetime msec service timestamps log datetime msec ! hostname krimson ! ! username kevin password 0 <password> ! isdn switch-type basic-net3 ! ! interface Loopback0 ip address 10.7.7.1 255.255.255.0 ip ospf network point-to-point ! interface Ethernet0 ip address 10.200.16.30 255.255.255.0 ! interface Serial1 bandwidth 64 no ip address encapsulation frame-relay no ip route-cache no ip mroute-cache ! interface Serial1.1 point-to-point backup interface Dialer0 ip address 10.5.5.2 255.255.255.0 no ip route-cache frame-relay interface-dlci 20 ! interface BRI0 description Testanschluss ISDN(intern), Nr. 4420038 no ip address encapsulation ppp no ip route-cache no ip mroute-cache load-interval 30 no keepalive dialer pool-member 1 isdn switch-type basic-net3 no fair-queue no cdp enable ppp authentication chap ! interface Dialer0 ip address 10.9.9.1 255.255.255.0 encapsulation ppp no ip route-cache no ip mroute-cache dialer pool 1 dialer remote-name kevin dialer string 6120 dialer-group 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 ! ip default-gateway 10.200.16.1 no ip classless no ip http server ! access-list 105 permit ip any host 10.7.7.1 access-list 105 permit ip any host 10.8.8.1 access-list 105 permit ip any any dialer-list 1 protocol ip permit ! 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 <password> login ! end |
kevin(思科2500路由器) |
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kevin#show running-config Building configuration... 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 ip ospf network point-to-point ! interface Loopback1 ip address 172.19.0.1 255.255.255.255 ! interface Ethernet0 ip address 10.200.16.26 255.255.255.0 ! interface Serial0 no ip address encapsulation frame-relay ! interface Serial0.1 point-to-point ip address 10.5.5.1 255.255.255.0 no cdp enable frame-relay interface-dlci 20 ! interface BRI0 no ip address encapsulation ppp dialer pool-member 1 isdn switch-type basic-net3 no cdp enable ppp authentication chap ! interface Dialer0 ip address 10.9.9.2 255.255.255.0 encapsulation ppp dialer pool 1 dialer remote-name krimson dialer-group 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 network 10.9.9.0 0.0.0.255 area 0 ! ip default-gateway 10.200.16.1 ip classless ! dialer-list 1 protocol ip permit 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 ! ntp clock-period 17180102 ntp server 10.200.20.134 end |
本節提供的資訊可用於確認您的組態是否正常運作。
使用以下命令驗證您的配置:
輸出直譯器工具支援某些show命令,使用此工具可檢視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。
show interface dialer — 顯示有關撥號器介面的資訊。
show ip route — 顯示IP路由表條目。
krimson#show interface serial 1.1 ! --- The initial state before the simulated Frame Relay network failure. ! --- The primary link is up and functional. Serial1.1 is up, line protocol is up Hardware is HD64570 Internet address is 10.5.5.2/24 Backup interface Dialer0, failure delay 0 sec, secondary disable delay 0 sec MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation FRAME-RELAY krimson#show int dialer 0 ! --- Initial state. The backup interface is in standby mode and inactive. Dialer0 is standby mode (spoofing), line protocol is down (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 Last input 1w6d, output never, output hang never Last clearing of "show interface" counters 6w4d 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 596 packets input, 48924 bytes 600 packets output, 49280 bytes 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 O 10.9.9.0 [110/3347] via 10.5.5.1, 00:03:34, Serial1.1 O 10.8.8.0 [110/1563] via 10.5.5.1, 00:03:34, Serial1.1 ! --- The route to the tested destination network points to the ! --- still-active primary link. C 10.5.5.0 is directly connected, Serial1.1 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
在這裡,我們可以看到幀中繼介面正在關閉。
krimson# *Apr 16 23:56:47.840: %LINK-3-UPDOWN: Interface Serial1, changed state to down *Apr 16 23:56:47.848: OSPF: Interface Serial1.1 going Down ! --- Here we have simulated a failure within the Frame Relay network. ! --- We can see what was conducted to the Frame Relay DTE router, ! --- and the subinterface going down. *Apr 16 23:56:47.852: %OSPF-5-ADJCHG: Process 10, Nbr 172.19.0.1 on Serial1.1 from FULL to DOWN, Neighbor Down: Interface down or detached *Apr 16 23:56:48.736: BACKUP(Serial1.1): event = primary went down *Apr 16 23:56:48.740: BACKUP(Serial1.1): changed state to "waiting to backup" *Apr 16 23:56:48.744: BACKUP(Serial1.1): event = timer expired *Apr 16 23:56:48.748: Di0 DDR is shutdown, could not clear interface. *Apr 16 23:56:48.752: BACKUP(Serial1.1): secondary interface (Dialer0) made active ! --- The configured backup interface is active. *Apr 16 23:56:48.752: BACKUP(Serial1.1): changed state to "backup mode" *Apr 16 23:56:48.756: OSPF: Interface Dialer0 going Up *Apr 16 23:56:48.760: BR0 DDR: rotor dialout [priority] *Apr 16 23:56:48.764: BR0 DDR: Dialing cause ip (s=10.9.9.1, d=224.0.0.5) ! --- OSPF packets trigger the call. *Apr 16 23:56:48.768: BR0 DDR: Attempting to dial 6120 *Apr 16 23:56:48.784: ISDN BR0: TX -> SETUP pd = 8 callref = 0x3E *Apr 16 23:56:48.792: Bearer Capability i = 0x8890 *Apr 16 23:56:48.796: Channel ID i = 0x83 *Apr 16 23:56:48.804: Called Party Number i = 0x80, '6120', Plan:Unknown, Type:Unknown *Apr 16 23:56:48.844: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1, changed state to down *Apr 16 23:56:48.884: ISDN BR0: RX <- CALL_PROC pd = 8 callref = 0xBE *Apr 16 23:56:48.892: Channel ID i = 0x89 *Apr 16 23:56:49.144: ISDN BR0: RX <- CONNECT pd = 8 callref = 0xBE *Apr 16 23:56:49.160: %LINK-3-UPDOWN: Interface BRI0:1, changed state to up *Apr 16 23:56:49.168: %DIALER-6-BIND: Interface BR0:1 bound to profile Di0 *Apr 16 23:56:49.176: BR0:1 PPP: Treating connection as a callout *Apr 16 23:56:49.180: BR0:1 PPP: Phase is ESTABLISHING, Active Open [0 sess, 0 load] *Apr 16 23:56:49.184: BR0:1 LCP: O CONFREQ [Closed] id 49 len 15 *Apr 16 23:56:49.188: BR0:1 LCP: AuthProto CHAP (0x0305C22305) *Apr 16 23:56:49.188: BR0:1 LCP: MagicNumber 0xF2143EDB (0x0506F2143EDB) *Apr 16 23:56:49.196: ISDN BR0: TX -> CONNECT_ACK pd = 8 callref = 0x3E *Apr 16 23:56:49.224: BR0:1 LCP: I CONFREQ [REQsent] id 83 len 15 *Apr 16 23:56:49.228: BR0:1 LCP: AuthProto CHAP (0x0305C22305) *Apr 16 23:56:49.232: BR0:1 LCP: MagicNumber 0x9ADACD69 (0x05069ADACD69) *Apr 16 23:56:49.236: BR0:1 LCP: O CONFACK [REQsent] id 83 len 15 *Apr 16 23:56:49.236: BR0:1 LCP: AuthProto CHAP (0x0305C22305) *Apr 16 23:56:49.240: BR0:1 LCP: MagicNumber 0x9ADACD69 (0x05069ADACD69) *Apr 16 23:56:49.244: BR0:1 LCP: I CONFACK [ACKsent] id 49 len 15 *Apr 16 23:56:49.248: BR0:1 LCP: AuthProto CHAP (0x0305C22305) *Apr 16 23:56:49.252: BR0:1 LCP: MagicNumber 0xF2143EDB (0x0506F2143EDB) *Apr 16 23:56:49.252: BR0:1 LCP: State is Open *Apr 16 23:56:49.256: BR0:1 PPP: Phase is AUTHENTICATING, by both [0 sess, 0 load] *Apr 16 23:56:49.260: BR0:1 CHAP: O CHALLENGE id 49 len 28 from "krimson" *Apr 16 23:56:49.276: BR0:1 CHAP: I CHALLENGE id 51 len 26 from "kevin" *Apr 16 23:56:49.284: BR0:1 CHAP: O RESPONSE id 51 len 28 from "krimson" *Apr 16 23:56:49.332: BR0:1 CHAP: I SUCCESS id 51 len 4 *Apr 16 23:56:49.344: BR0:1 CHAP: I RESPONSE id 49 len 26 from "kevin" *Apr 16 23:56:49.352: BR0:1 CHAP: O SUCCESS id 49 len 4 *Apr 16 23:56:49.356: BR0:1 PPP: Phase is UP [0 sess, 0 load] *Apr 16 23:56:49.360: BR0:1 IPCP: O CONFREQ [Not negotiated] id 41 len 10 *Apr 16 23:56:49.364: BR0:1 IPCP: Address 10.9.9.1 (0x03060A090901) *Apr 16 23:56:49.376: BR0:1 IPCP: I CONFREQ [REQsent] id 29 len 10 *Apr 16 23:56:49.380: BR0:1 IPCP: Address 10.9.9.2 (0x03060A090902) *Apr 16 23:56:49.384: BR0:1 IPCP: O CONFACK [REQsent] id 29 len 10 *Apr 16 23:56:49.388: BR0:1 IPCP: Address 10.9.9.2 (0x03060A090902) *Apr 16 23:56:49.396: BR0:1 IPCP: I CONFACK [ACKsent] id 41 len 10 *Apr 16 23:56:49.400: BR0:1 IPCP: Address 10.9.9.1 (0x03060A090901) *Apr 16 23:56:49.400: BR0:1 IPCP: State is Open *Apr 16 23:56:49.408: BR0:1 DDR: dialer protocol up *Apr 16 23:56:49.416: Di0 IPCP: Install route to 10.9.9.2 *Apr 16 23:56:49.960: OSPF: Rcv hello from 172.19.0.1 area 0 from Dialer0 10.9.9.2 *Apr 16 23:56:49.964: OSPF: End of hello processing *Apr 16 23:56:50.356: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1, changed state to up *Apr 16 23:56:50.748: %LINK-3-UPDOWN: Interface Dialer0, changed state to up *Apr 16 23:56:50.752: Di0 LCP: Not allowed on a Dialer Profile *Apr 16 23:56:50.752: BACKUP(Dialer0): event = primary came up *Apr 16 23:56:55.176: %ISDN-6-CONNECT: Interface BRI0:1 is now connected to 6120 kevin *Apr 16 23:56:58.804: OSPF: Rcv DBD from 172.19.0.1 on Dialer0 seq 0x988 opt 0x42 flag 0x7 len 32 mtu 1500 state INIT *Apr 16 23:56:58.808: OSPF: 2 Way Communication to 172.19.0.1 on Dialer0, state 2WAY krimson#show interface serial 1.1 Serial1.1 is down, line protocol is down ! --- The primary link is down. Hardware is HD64570 Internet address is 10.5.5.2/24 Backup interface Dialer0, failure delay 0 sec, secondary disable delay 0 sec 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 Dialer0 is up, line protocol is up (spoofing) ! --- The backup interface is active and bearing traffic. 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 6w4d 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 614 packets input, 50240 bytes 618 packets output, 50584 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 00:01:57 Interface is bound to Di0 (Encapsulation PPP) LCP Open Open: IPCP Last input 00:00:01, output 00:00:02, 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 3910 packets input, 394443 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 3613 packets output, 222417 bytes, 0 underruns 0 output errors, 0 collisions, 27 interface resets 0 output buffer failures, 0 output buffers swapped out 607 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, 00:00:53, Dialer0 ! --- The route entry to the destination network is now pointing to ! --- the backup interface as a next hop. 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#ping 10.8.8.1 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.8.8.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 36/36/40 ms
在這裡,我們可以看到一旦幀中繼網路中的故障被清除,系統就會恢復到初始狀態:
krimson#show interface serial 1.1 Serial1.1 is up, line protocol is up Hardware is HD64570 Internet address is 10.5.5.2/24 Backup interface Dialer0, failure delay 0 sec, secondary disable delay 0 sec 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 Dialer0 is standby mode (spoofing), line protocol is down (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 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 665 packets input, 54008 bytes 671 packets output, 54548 bytes 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 O 10.9.9.0 [110/3347] via 10.5.5.1, 00:08:39, Serial1.1 O 10.8.8.0 [110/1563] via 10.5.5.1, 00:08:39, Serial1.1 C 10.5.5.0 is directly connected, Serial1.1 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 krimson#
注意:被叫端不需要任何特定配置。
在正常操作過程中記錄的相同show輸出包含以下資訊:
kevin#show interface serial 0.1 Serial0.1 is up, line protocol is up ! --- The primary interface is up and running. Hardware is HD64570 Internet address is 10.5.5.1/24 MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation FRAME-RELAY kevin#show interface dialer 0 Dialer0 is up (spoofing), line protocol is up (spoofing) ! --- Note: On the called side, the dialer interface is active ! --- and not in standby mode. Hardware is Unknown Internet address is 10.9.9.2/24 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 Last input 1w6d, output never, output hang never Last clearing of "show interface" counters 4w2d 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 598 packets input, 49252 bytes 596 packets output, 48924 bytes kevin#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 0.0.0.0 172.17.0.0/32 is subnetted, 1 subnets S 172.17.247.195 [1/0] via 10.200.16.1 172.19.0.0/32 is subnetted, 1 subnets C 172.19.0.1 is directly connected, Loopback1 10.0.0.0/24 is subnetted, 5 subnets C 10.5.5.0 is directly connected, Serial0.1 O 10.7.7.0 [110/65] via 10.5.5.2, 00:04:27, Serial0.1 C 10.9.9.0 is directly connected, Dialer0 C 10.8.8.0 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
下面是故障期間記錄的相同資訊:
kevin#show interface serial 0.1 Serial0.1 is down, line protocol is down Hardware is HD64570 Internet address is 10.5.5.1/24 MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation FRAME-RELAY kevin#show interface dialer 0 Dialer0 is up, line protocol is up (spoofing) Hardware is Unknown Internet address is 10.9.9.2/24 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 4w2d 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 618 packets input, 50700 bytes 616 packets output, 50384 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 set (10 sec) DTR is pulsed for 1 seconds on reset Time to interface disconnect: idle 00:01:57 Interface is bound to Di0 (Encapsulation PPP) LCP Open Open: IPCP Last input 00:00:03, output 00:00:02, 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 5 minute input rate 0 bits/sec, 0 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 1280 packets input, 138077 bytes, 0 no buffer Received 0 broadcasts, 0 runts, 0 giants, 0 throttles 9789 input errors, 9789 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 1309 packets output, 138487 bytes, 0 underruns 0 output errors, 0 collisions, 15 interface resets 0 output buffer failures, 0 output buffers swapped out 351 carrier transitions kevin#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 0.0.0.0 172.17.0.0/32 is subnetted, 1 subnets S 172.17.247.195 [1/0] via 10.200.16.1 172.19.0.0/32 is subnetted, 1 subnets C 172.19.0.1 is directly connected, Loopback1 10.0.0.0/8 is variably subnetted, 5 subnets, 2 masks O 10.7.7.0/24 [110/1786] via 10.9.9.1, 00:01:21, Dialer0 C 10.9.9.0/24 is directly connected, Dialer0 C 10.8.8.0/24 is directly connected, Loopback0 C 10.9.9.1/32 is directly connected, Dialer0 C 10.200.16.0/24 is directly connected, Ethernet0 S* 0.0.0.0/0 [1/0] via 10.200.16.1
本節提供的資訊可用於對組態進行疑難排解。
此處使用的具有點對點子介面和開放最短路徑優先(OSPF)路由協定的幀中繼配置特定於此設定。但是,圖中所示的故障排除步驟更為通用,可用於不同的配置,例如幀中繼點對多點或具有高級資料鏈路控制(HDLC)或點對點協定(PPP)封裝的主鏈路,而不管所使用的路由協定如何。
為了檢驗備份功能,Cisco 4500路由器上用作幀中繼交換機的一個介面已置於關閉狀態,以便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。這將啟用備份介面。
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
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並使用動態定址的網路上的幀中繼ARP應答的調試資訊。
修訂 | 發佈日期 | 意見 |
---|---|---|
1.0 |
04-Feb-2010 |
初始版本 |