Hello!

I using 190 device and peering with ospf network. I have one router having problem the ospf .
The error log message:

Discarding packet: wrong chekcsum
19:36:24 route,ospf,info source=155.50.50.1
OSPF neighbor 14.0.0.43: state change from Loading to 2-Way
19:37:05 route,ospf,info Ignoring Link State Acknowledgment packet: wrong peer state


I change the router rb133 to rb333,using 3.10 os version upgrade 3.20 version, the problem have again. Use routing package not routing test.

Thank you the information.

The error created ,bad ethernet interface, change other card and the ospf working fine.
Big mistake ,only read this problem cisco description.