Cisco 9800 Configuration Mismatch

[NWJ]

Hi,

I have an SSO pair of 9800 controllers on Amsterdam 17.3.
The standby has begun to be unstable reloading due to "confguration mismatch". Happens 10 times over the last 24 hour period

I can only think is some sort of config sync failure/error as the whole point of SSO is the config is shared continiously so shouldn't ever be in a mismatch  state.

Deployed using the redundancy port but looking to change to RMI + RP (have to go through change control). 

Looking for advice on what could be the issue?

Thanks,

NWJ

[marce1000]

 - Note sure if this could be related :

              https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvy35528

   M.

[Arshad Safrulla]

How your RP ports are connected and what's the upstream devices how its connected? Is there any WAN link, dark fiber between the devices? 

[NWJ]

Turned out to be a trustpoint that DNA-C is attempted to install was causing the config mismatch and forcing a continous reboot of the standby.
TAC are currently investigating.