OSPF Adjacency stuck in EXCHANGE/EX-START - CISCO 6880

[denniska1996]

hello,

I am facing with a big problem in my cisco switch

I have cisco 6880 switch with an OSPF link to cisco switches

It has been working fine for years and all of a suden the process went down, and is stuck in EXCHANGE/EXSTART states

I have another OSPF link (for redundancy purpose) between these two devices that is still working fine

i check all my switches and all the configuration it's right,

i run the command debug ip ospf on the switch and i have an ERROR about the auth key, but no one touch the configuration, and I try to configure it again but i still have the problem with the adj.

I did the clear ospf process on the switches too and I still have the problem,

Any suggestion ?

[MHM Cisco World]

If So

Are you use key chain 

Do you use lifetime of key 

If that correct check NTP 

MHM

[balaji.bandi]

i run the command debug ip ospf on the switch and i have an ERROR about the auth key, but no one touch the configuration, and I try to configure it again but i still have the problem with the adj.

do you have any recent any IOS/IOSXE upgraded ?

suggest to use simple password or try no password see if that fixes.

can you post both the side :

show ip ospf traffic

that give you some information for you to identify the clear issue :

OSPF header errors
    Length 0, Checksum 0, Version 0, Bad Source 0, 
    No Virtual Link 0, Area Mismatch 0, No Sham Link 0, 
    Self Originated 0, Duplicate ID 0, LLS 0, 
    Authentication 0,