Yep! Both timers have been changed on R2, so we’ve got to either change the hello and dead timers on R3 to match those on R2, or reset the timers on R2 back to the default. We're on R2 already, so we'll use no ip ospf hello 15 to change the interface settings back to the default.

R2(config)#int e0 R2(config-if)#no ip ospf hello 15

The adjacency comes up seconds later, as verified by show ip ospf neighbor.

R2#show ip ospf neighbor Neighbor ID Pri State Dead Time Address Interface 172.23.23.3 1 FULL/DR 00:00:36 172.23.23.3 Ethernet0

Don’t count on being able to spot problems just by looking at router configs – make sure to run debugs during your CCNA and CCNP preparation to see how things work, and that will help you to spot the problem when things aren’t working!

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