IP Routing TroubleShooting— OSPF、BGP
Contents
1. 7609 7609 EE o 7609 feload reload 2010 7 2 Case 1 5 5 7609 static route GSR freload 2010 7 2 i PEEK ch HR DUR IZ Case 2 1 2 A B MPLS TE MPLS TE C site f RERA MPLS TE 2010 7 2 Case 2 2 2 Cisco TAC I0S Label 0 implicit null 10S XR MPLS Lable 0Aexplicit null Label 3 implicit null om mi 2010 7 2 27 sow commands debug outpu log messages traceroute and ping Troubleshooting Exercises TWNOG 2010 7 2 Troubleshooting Exercise 1 4 mis operation copy modified and paste Add a new route 2010 7 2 Troubleshooting Exercis2. ACL show ip bgp neighbors x x x x advertised routes routes router ACL show ip bgp neighbors x x x x received routes routes router ACL show ip route x x X X Toute 2010 7 2 Troubleshooting tools show commands debug output log messages traceroute and ping Troubleshooting Exercises 2010 7 2 Case 1 1 5 tOXGKUS b 3H P RRS XE REL OE Hsu ROC 0 HER SCELERE Bj Bc ik aS ET o traceroute GER GR i t ote Ta Te tn ee f 7 2010 7 2 Case 1 2 5 HAR HALA f o 2010 7 2 Case 1 3 5 gt TAHR h A P As d xl default route Cisco 7609 gt RZA f ERE SE o 2010 7 2 default route
3. TWNOG Workshop TWNOG Taiwan Network Operators Group ands debug output log messages traceroute and ping OE LIE BR DUARTE Troubleshooting Exercises Ge TWNOG 2010 7 2 2 Troubleshooting tools show commands debug output log messages traceroute and ping Troubleshooting Exercises 2010 7 2 show Commands 1 3 2010 7 2 show Commands 2 3 2010 7 2 show Commands 3 3 2010 7 2 debug Command 1 3 router debug ip ospf adj OSPF adjacency events database timer OSPF database timer events OSPF events flood OSPF flooding hello OSPF hello events Isa generation OSPF Isa generation mpls OSPF MPLS nsf OSPF non stop forwarding events packet OSPF packets retransmission OSPF retransmission events spf OSPF spf tree OSPF database tree 2010 7 2 debug Command 2 3 router debug ip bgp A B C D BGP neighbor address dampening BGP dampening events BGP events keepalives BGP keepalives updates BGP updates lt cr gt 2010 7 2 debug Command 3 3 router debug ip bgp updates 1 199 Access list 1300 2699 Access list expanded range lt cr gt router debug ip bgp x x x x updates lt 1 199 gt Access list lt 1300 2699 gt Access list expanded range lt cr gt Use an access list to limit the output 2010 7 2 log Messages OSPF log
4. adjacency changes Process 100 Nbr x x x x on GigabitEthernetx x from FULL to DOWN Neighbor Down Interface down or detached BGP bgp log neighbor changes BGP 5 ADJCHANGE neighbor x x x x Up BGP 5 ADJCHANGE neighbor x x x x Down Remote AS changed 2010 7 2 Repeat count Datagram size Source address or interface round trip min avg max 2010 7 2 traceroute http www traceroute org http traceroute hinet net HiNet Traceroute IP Bk Hostname voomw ahi 82 496 Visitors Since August 27 2008 Traceroute Result Translating www yahoo com tw domain server 168 95 192 1 0K Type escape sequence to abort Tracing the route to twl v2 rd tw gl b yahoo com 119 160 246 23 1 tp s2 c rl router hinet net 210 65 161 22 0 msec 4 msec 0 msec 2 tp crsi2 router hinet net 220 128 2 146 4 nsec 0 msec 0 nsec 3 tp s2 nx01 router hinet net 220 128 2 153 4 msec 4 msec 0 msec 4 211 22 41 45 4 msec 0 msec 4 msec 5 te 8 1 bas2 1 prd twl yahoo com 119 160 240 3 0 msec te 8 1 bas1 1 prd twl yahoo com 119 160 240 1 0 nsec te 8 1 bas2 1 prd twl yahoo com 119 160 240 3 0 nsec 2010 7 2 Troubleshooting tools show commands debug output log messages traceroute and ping RK I AR DUREE Troubleshooting Exercises 2010 7 2 1 5 OSPF Neighbor state stuck Ini
5. e 2 4 mis operation copy modified and paste Delete an old route m 0 7 2 Troubleshooting Exercise 3 4 mis operation Reload a router boot system flash diskO newios router ospf 100 max metric router Isa end write reload 2010 7 2 Troubleshooting Exercise 4 4 co CD n z He N 2010 7 2 References Troubleshooting BGP in Large IP Networks Session 2210 Cisco Systems HiNet 2010 7 2
6. t state Link problem Input Access list deny ip 224 0 0 5 OSPF hello packets destination Two Way state Priority of all interfaces set to 0 Normal if have full adjacency with DR and BDR Exstart Exchange state MTU mismatch Authentication key mismatch 2010 7 2 2 5 BGP Neighbor state stuck Routers establish TCP session on port 179 Permit in ACLs P connectivity Route from IGPs ncorrect configuration Local AS gt remote as Update source interface mismatch eBGP peer multihop count Password mismatch 2010 7 2 2 5 show ip bgp neighbors x x x x include Last reset show ip bgp neighbors x x x x flap statistics show ip bgp neighbors x x x x dampened routes show ip bgp neighbors x x x x policy show ip bgp summary BGP session flapping 2010 7 2 3 5 Router BRAS NE N HPER _DSLAM Route reflector show ip route XX XX XX XX Aggregate router Sshow ip route XX XX XX XX 2010 7 2 4 5 On 4 traceroute output gt F BF X amp iA show ip route IP 2010 7 2 5 5 routes
Download Pdf Manuals
Related Search