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popcorrin
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OSPF Issues

Sat Oct 15, 2011 5:50 am

I have copied the log messages below.

OSPFv2 neighbor 10.10.3.1: state change from Exchange to 2-Way
Database Description packet has init bit set in middle of an exchange

I get those 2 lines over and over and I lose all my routes.

The logs also shows the following line a few times.

OSPFv2 neighbor 10.10.3.1: state change from ExStart to 2-Way



Can somebody tell me what is going on.

My routers are running ROS 5.4 and 5.5

Please let me know if you need more info.

Thanks
 
fewi
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Re: OSPF Issues

Sat Oct 15, 2011 5:55 am

Upgrade. Both sides. That's a bug.

If it ain't fixed in 5.7 (current), email support@mikrotik.com.
Specific answers require specific questions. When in doubt, post the output of "/ip address print detail", "/ip route print detail", "/interface print detail", "/ip firewall export", and an accurate network diagram.
 
popcorrin
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Re: OSPF Issues

Sat Oct 15, 2011 10:48 am

Thanks, I'll do that tonight.

I'm not sure how this post ended up in the hardware forum.
 
tyronzn
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Re: OSPF Issues

Mon Jan 09, 2012 9:29 am

I increased my MTU from default 1500 to 1512 between the two interfaces and those problems seem to have gone away,no more losing routes and no more errors in log file.Give it a bash and see if it works for you.
 
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kameelperdza
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Re: OSPF Issues

Mon Feb 25, 2013 2:19 pm

Had the same problem after upgrading routers from 4.10 to 5.24.

Thank you tyronzn for the temporary fix.
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