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JN0-643 · Question #196
JN0-643 Question #196: Real Exam Question with Answer & Explanation
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Question
Referring to the exhibit, what is preventing the OSPF adjacency on interface ge-0/0/4 from forming? user@router> show log ospf Sep 19 00:22:13.420315 OSPF packet ignoreD. MTU mismatch from 11.0.0.2 on intf ge-0/0/2.0 area 0.0.0.0 Sep 19 00:22:14.475671 OSPF periodic xmit from 14.0.0.1 to 224.0.0.5 (IFL 75 area 0.0.0.0) Sep 19 00:22:14.855490 OSPF periodic xmit from 12.0.0.1 to 224.0.0.5 (IFL 84 area 0.0.0.0) Sep 19 00:22:14.857304 OSPF packet ignoreD. no matching interface from 12.0.0.1, IFL Sep 19 00:22:17.386726 OSPF packet ignoreD. MTU mismatch from 11.0.0.2 on intf ge- 0/0/2.0 area 0.0.0.0 Sep 19 00:22:20.855690 OSPF packet ignoreD. subnet mismatch from 10.0.0.2 on intf ge- 0/0/1.0 area 0.0.0.0 Sep 19 00:22:20.856108 OSPF rcvd Hello 10.0.0.2 -> 224.0.0.5 (ge- 0/0/1.0 IFL 75 area 0.0.0.0) Sep 19 00:22:20.856177 Version 2, length 44, ID 10.0.0.2, area 0.0.0.0 Sep 19 00:22:20.856229 checksum 0x0, authtype 0 Sep 19 00:22:20.856299 mask 255.255.255.252, hello_ivl 10, opts 0x12, prio 128 Sep 19 00:22:20.856352 dead_ivl 40, DR 0.0.0.0, BDR 0.0.0.0 Sep 19 00:22:21.752438 OSPF packet ignoreD. MTU mismatch from 11.0.0.2 on intf ge- 0/0/2.0 area 0.0.0.0 Sep 19 00:22:22.013285 OSPF packet ignoreD. area mismatch (0.0.0.1) from 12.0.0.2 on intf ge-0/0/4.0 area 0.0.0.0 Sep 19 00:22:22.013749 OSPF rcvd Hello 12.0.0.2 -> 224.0.0.5 (ge- 0/0/4.0 IFL 84 area 0.0.0.0) Sep 19 00:22:22.013804 Version 2, length 44, ID 10.0.0.2, area 0.0.0.1 Sep 19 00:22:22.013890 checksum 0xd51e, authtype 0 Sep 19 00:22:22.013944 mask 255.255.255.252, hello_ivl 10, opts 0x12, prio 128 Sep 19 00:22:22.014012 dead_ivl 40, DR 12.0.0.2, BDR 0.0.0.0 Sep 19 00:22:22.016909 OSPF packet ignoreD. no matching interface from 12.0.0.2, IFL Sep 19 00:22:22.434956 OSPF hello from 11.0.0.2 (IFL 83, area 0.0.0.0) absorbed Sep 19 00:22:23.045916 OSPF periodic xmit from 12.0.0.1 to 224.0.0.5 (IFL 84 area 0.0.0.0) Sep 19 00:22:23.047959 OSPF packet ignoreD. no matching interface from 12.0.0.1, IFL Sep 19 00:22:23.309957 OSPF periodic xmit from 11.0.0.1 to 224.0.0.5 (IFL 83 area 0.0.0.0) Sep 19 00:22:23.528614 OSPF periodic xmit from 14.0.0.1 to 224.0.0.5 (IFL 75 area 0.0.0.0) Sep 19 00:22:25.772835 OSPF packet ignoreD. MTU mismatch from 11.0.0.2 on intf ge- 0/0/2.0 area 0.0.0.0 Sep 19 00:22:29.950015 OSPF hello from 11.0.0.2 (IFL 83, area 0.0.0.0) absorbed Sep 19 00:22:30.622112 OSPF packet ignoreD. MTU mismatch from 11.0.0.2 on intf ge- 0/0/2.0 area 0.0.0.0 Sep 19 00:22:30.713279 OSPF packet ignoreD. subnet mismatch from 10.0.0.2 on intf ge- 0/0/1.0 area 0.0.0.0 Sep 19 00:22:30.713432 OSPF rcvd Hello 10.0.0.2 -> 224.0.0.5 (ge- 0/0/1.0 IFL 75 area 0.0.0.0) Sep 19 00:22:30.713503 Version 2, length 44, ID 10.0.0.2, area 0.0.0.0 Sep 19 00:22:30.713553 checksum 0x0, authtype 0 Sep 19 00:22:30.713622 mask 255.255.255.252, hello_ivl 10, opts 0x12, prio 128 Sep 19 00:22:30.713677 dead_ivl 40, DR 0.0.0.0, BDR 0.0.0.0
Options
- Aarea mismatch
- Bsubnet mismatch
- CMTU mismatch
- Dauthentication mismatch
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