Example 4-19 Determining Whether an Authentication Mismatch Exists
RouterX#ddeebbuugg iipp oossppff aaddjj
*Feb 17 18:51:31.242: OSPF: Rcv pkt from 192.168.1.102, Serial0/0/1 :
Mismatch Authentication type. Input packet specified type 0, we use type 1
RouterY#ddeebbuugg iipp oossppff aaddjj
*Feb 17 18:50:43.046: OSPF: Rcv pkt from 192.168.1.101, Serial0/0/1 :
Mismatch Authentication type. Input packet specified type 1, we use type 0
NOTE The different types of authentication have these codes:
?– Null is type 0
?– Simple password is type 1
?– MD5 is type 2
Example 4-20 debug ip ospf adj Command Output Con?¬?rms an Authentication Mismatch
RouterX#ddeebbuugg iipp oosspp aaddjj
*Feb 17 18:54:01.238: OSPF: Rcv pkt from 192.168.1.102, Serial0/0/1 :
Mismatch Authentication Key - Clear Text
RouterY#ddeebbuugg iipp oossppff aaddjj
*Feb 17 18:53:13.050: OSPF: Rcv pkt from 192.168.1.101, Serial0/0/1 :
Mismatch Authentication Key - Clear Text
Review Questions 167
Summary of Troubleshooting OSPF
Troubleshooting OSPF is an important skill. Most OSPF problems are related to con?¬?guration and
will most likely show themselves when the routers attempt to form OSPF adjacencies.
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