Troubleshooting im konvergenten Netz. Dirk Zimmermann HS - Wismar
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1 Troubleshooting im konvergenten Netz Dirk Zimmermann HS - Wismar
2 Beispielnetzwerk
3 Vor der Backup Konfiguration Rostock#ping Protocol [ip]: Target IP address: berlin-net Repeat count [5]: Datagram size [100]: 1500 Timeout in seconds [2]: Extended commands [n]: y Source address or interface: Sending 5, 1500-byte ICMP Echos to , timeout is 2 seconds: Packet sent with a source address of !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 384/386/396 ms
4 traceroute von Rostock nach Berlin Rostock#traceroute Protocol [ip]: Target IP address: berlin-net Source address: Numeric display [n]: y Timeout in seconds [3]: Probe count [3]: Minimum Time to Live [1]: Maximum Time to Live [30]: 3 Port Number [33434]: Loose, Strict, Record, Timestamp, Verbose[none]: Type escape sequence to abort. Tracing the route to msec 12 msec 12 msec msec * 16 msec
5 Beispielnetzwerk Backup Links
6 show und debug show und debug commands on cisco devices are our friends sh ip protocol sh ip route sh ip interface brief sh interface show running-config ist ein beliebtes aber nicht zuverlässiges Kommando um einen Fehler zu finden. Wenn, dann show run begin router eigrp 100
7 debug ip packet debug ip packet detail 10 debug ip routing
8 Beispielnetzwerk Backup Links
9 Extendet Ping von Rostock nach Berlin Rostock#ping Protocol [ip]: Target IP address: berlin-net Repeat count [5]: Datagram size [100]: 1500 Timeout in seconds [2]: Extended commands [n]: y Source address or interface: : Sending 5, 1500-byte ICMP Echos to , timeout is 2 seconds: Packet sent with a source address of !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 664/668/680 ms
10 traceroute Rostock - Berlin Rostock#traceroute Protocol [ip]: Target IP address: berlin-net Source address: Numeric display [n]: Timeout in seconds [3]: *Mar 1 02:08:37.279: is_up: 0 state: 0 sub state: 1 line: 0 has_route: False Probe count [3]: Minimum Time to Live [1]: Maximum Time to Live [30]: Port Number [33434]: Loose, Strict, Record, Timestamp, Verbose[none]: Type escape sequence to abort. Tracing the route to berlin-net ( ) msec 12 msec 12 msec msec 24 msec 24 msec msec 24 msec 28 msec msec * 40 msec
11 Beispielnetzwerk Backup Links
12 Muenchen#sh ip route Codes: C - connected, S - static, 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 i - IS-IS, su - IS-IS summary, 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 not set /30 is subnetted, 1 subnets C is directly connected, Serial0/ /30 is subnetted, 1 subnets D [90/ ] via , 01:42:09, Serial0/ /30 is subnetted, 3 subnets D [90/ ] via , 01:42:09, Serial0/2 C is directly connected, Serial0/0 C is directly connected, Serial0/1 C /24 is directly connected, FastEthernet0/0 O /24 [110/65] via , 01:41:57, Serial0/1 D /24 [90/ ] via , 01:42:09, Serial0/2
13 Traceroute rostock berlin nach der Inbetriebnahme des Backup Links Backup Links EIGRP Backup AS
14 Rostock#traceroute Protocol [ip]: Target IP address: berlin-net Source address: Numeric display [n]: Timeout in seconds [3]: *Mar 1 02:08:37.279: is_up: 0 state: 0 sub state: 1 line: 0 has_route: False Probe count [3]: Minimum Time to Live [1]: Maximum Time to Live [30]: Port Number [33434]: Loose, Strict, Record, Timestamp, Verbose[none]: Type escape sequence to abort. Tracing the route to berlin-net ( ) msec 12 msec 12 msec msec 24 msec 24 msec msec 24 msec 28 msec msec * 40 msec
15 Loesungsweg Ansatz Muenchen#debug ip routing Muenchen# Muenchen#clear ip route * Muenchen# *Mar 1 02:11:23.751: is_up: 1 state: 4 sub state: 1 line: 1 has_route: True *Mar 1 02:11:23.751: RT: add /24 via , connected metric [0/0] *Mar 1 02:11:23.751: RT: NET-RED /24 ::: *Mar 1 02:11:23.767: RT: add /30 via , eigrp metric [90/ ] *Mar 1 02:11:23.767: RT: NET-RED /30 *Mar 1 02:11:23.767: RT: add /30 via , eigrp metric [90/ ] *Mar 1 02:11:23.771: RT: NET-RED /30 *Mar 1 02:11:23.771: RT: add /24 via , eigrp metric [90/ ] *Mar 1 02:11:23.771: RT: NET-RED /24 *Mar 1 02:11:23.779: RT: add /24 via , ospf metric [110/65] *Mar 1 02:11:23.779: RT: NET-RED /24
16 Ändern der Administrativen Distance Muenchen(config)#router eigrp 100 Muenchen(config-router)#distance Muenchen(config-router)#
17 Muenchen#sh ip route D [90/ ] via , 00:04:26, Serial0/2 C is directly connected, Serial0/0 C is directly connected, Serial0/1 C /24 is directly connected, FastEthernet0/0 O /24 [110/65] via , 00:04:27, Serial0/1 O /24 [110/65] via , 00:00:00, Serial0/0 *Mar 1 02:15:50.543: RT: delete route to via , eigrp metric [90/ ] *Mar 1 02:15:50.543: RT: no routes to *Mar 1 02:15:50.543: RT: NET-RED /24 *Mar 1 02:15:50.543: RT: delete network route to *Mar 1 02:15:50.547: RT: NET-RED /24 *Mar 1 02:15:50.551: RT: add /24 via , ospf metric [110/65] *Mar 1 02:15:50.551: RT: NET-RED /24
18 Im Backup Fall Rostock#sh ip route O /24 [110/782] via , 00:00:24, Serial0/0 C /24 is directly connected, FastEthernet0/0 O E /24 [110/220] via , 00:00:24, Serial0/0
19 Rostock nach richtiger Konfiguration Rostock#sh ip route Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area O /24 [110/782] via , 00:08:35, Serial0/0 C /24 is directly connected, FastEthernet0/0 O /24 [110/846] via , 00:08:35, Serial0/0
20 Danke für die Aufmerksamkeit
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