— Exhibit —
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 85
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 85
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 85
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
— Exhibit —
Click the Exhibit button.
Referring to the exhibit, what is preventing the OSPF adjacency on interface ge-0/0/4 from
forming?
A.
area mismatch
B.
subnet mismatch
C.
MTU mismatch
D.
authentication mismatch
this is clearly MTU mismatch..answer is C
A
I believe it should be A as well as Ge-0/0/4 is the interface you are asked about.