Dieses Dokument enthält eine Beispielkonfiguration für ISDN-Backups und grundlegende Informationen zur Fehlerbehebung für diese Konfigurationsart.
Informationen zu den häufigsten Implementierungen von ISDN-Backups und deren Vergleiche finden Sie im folgenden Dokument: Evaluierung von Backup-Schnittstellen, Floating Static Routes und Dialer Watch für DDR-Backup.
Für dieses Dokument bestehen keine besonderen Voraussetzungen.
Die Informationen in diesem Dokument basieren auf den unten stehenden Software- und Hardwareversionen.
Zwei Cisco 2500-Router (Frame Relay Data Terminal Equipment, DTEs) mit Cisco IOS® Software Releases 12.2(3) und 12.2(5).
Ein Cisco 4500-Router fungiert als Frame-Relay-Switch.
Die in diesem Dokument enthaltenen Informationen wurden aus Geräten in einer bestimmten Laborumgebung erstellt. Alle in diesem Dokument verwendeten Geräte haben mit einer leeren (Standard-)Konfiguration begonnen. Wenn Sie in einem Live-Netzwerk arbeiten, stellen Sie sicher, dass Sie die potenziellen Auswirkungen eines Befehls verstehen, bevor Sie es verwenden.
Weitere Informationen zu Dokumentkonventionen finden Sie in den Cisco Technical Tips Conventions.
In diesem Abschnitt erhalten Sie Informationen zum Konfigurieren der in diesem Dokument beschriebenen Funktionen.
Hinweis: Um weitere Informationen zu den in diesem Dokument verwendeten Befehlen zu erhalten, verwenden Sie das Command Lookup Tool (nur registrierte Kunden).
In diesem Dokument wird die im Diagramm unten dargestellte Netzwerkeinrichtung verwendet.
In diesem Dokument werden die unten angegebenen Konfigurationen verwendet.
krimson (Cisco Router der Serie 2500) |
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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 (Cisco Router der Serie 2500) |
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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 |
Dieser Abschnitt enthält Informationen, mit denen Sie überprüfen können, ob Ihre Konfiguration ordnungsgemäß funktioniert.
Überprüfen Sie Ihre Konfiguration mithilfe der folgenden Befehle:
Bestimmte show-Befehle werden vom Output Interpreter-Tool unterstützt, mit dem Sie eine Analyse der Ausgabe des show-Befehls anzeigen können.
show interfaces serial - Zeigt Informationen über die Multicast Data-Link Connection Identifier (DLCI), die für die Schnittstelle verwendeten DLCIs und den DLCI für die Local Management Interface (LMI) an.
show interface dialer - Zeigt Informationen über die Dialer-Schnittstelle an.
show ip route: Zeigt Einträge der IP-Routing-Tabelle an.
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
Hier sehen wir, dass die Frame Relay-Schnittstelle ausfällt.
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
Hier sehen Sie, wie das System nach Behebung des Fehlers im Frame Relay-Netzwerk wieder in seinen ursprünglichen Zustand zurückwechselt:
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#
Hinweis: Auf der angerufenen Seite ist keine spezifische Konfiguration erforderlich.
Die gleiche während des normalen Betriebs aufgezeichnete Anzeigeausgabe enthält folgende Informationen:
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
Im Folgenden werden die gleichen Informationen aufgeführt, die während des Fehlers erfasst wurden:
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
Dieser Abschnitt enthält Informationen zur Fehlerbehebung in Ihrer Konfiguration.
Die Frame-Relay-Konfigurationen mit Point-to-Point-Subschnittstellen und Open Shortest Path First (OSPF) als Routing-Protokoll, das hier verwendet wird, sind für diese Konfiguration spezifisch. Die gezeigten Fehlerbehebungsschritte sind jedoch allgemeiner gehalten und können mit verschiedenen Konfigurationen verwendet werden, z. B. Frame Relay Point-to-Multipoint oder einer primären Verbindung mit High-Level Data Link Control (HDLC) oder Point-to-Point Protocol (PPP)-Kapselung, unabhängig vom verwendeten Routing-Protokoll.
Um die Backup-Funktionalität zu überprüfen, wurde eine der Schnittstellen des Cisco 4500-Routers, der als Frame-Relay-Switch fungiert, in den heruntergefahrenen Zustand versetzt, um ein Problem innerhalb des Frame-Relay-Netzwerks zu simulieren. Dies führt dazu, dass der inaktive PVC-Zustand über das Frame-Relay-Netzwerk zum DTE-Router und ein Ausfall der Frame-Relay-Subschnittstelle ausgeführt wird. Dadurch wird die Backup-Schnittstelle aktiviert.
Hinweis: Bevor Sie Debugbefehle ausgeben, lesen Sie Wichtige Informationen über Debug-Befehle.
debug isdn q931
Debug-Sicherung - Debuggt Sicherungsereignisse.
Debug Dialer: Zeigt Debuginformationen über die Pakete oder Ereignisse auf einer Dialer-Schnittstelle an.
debug ppp negotiation - Führt den Befehl debug ppp dazu, während des PPP-Starts übertragene PPP-Pakete anzuzeigen, über die PPP-Optionen ausgehandelt werden.
debug ppp authentication - Führt dazu, dass der Befehl debug ppp Authentifizierungsprotokollmeldungen anzeigt, einschließlich CHAP-Paketaustausch (Challenge Authentication Protocol) und PAP-Austausch (Password Authentication Protocol).
debug ip ospf events - Zeigt Informationen über OSPF-bezogene Ereignisse an, z. B. Adjacencies, Flooding-Informationen, die Auswahl des designierten Routers und die Berechnung des kürzesten Pfades First (SPF)
debug frame-relais events - Zeigt Debuginformationen über Frame Relay ARP-Antworten in Netzwerken an, die einen Multicast-Channel unterstützen und dynamische Adressierung verwenden.
Überarbeitung | Veröffentlichungsdatum | Kommentare |
---|---|---|
1.0 |
04-Feb-2010 |
Erstveröffentlichung |