9300 running 16.9.3 speaking to 6807-XL running 12.2

[holden.hemming@us.af.mil]

Is there any known issue regarding latency or not working at all with a Cisco 9300 running 16.9.3 and Cisco 6807-XLs running 12.2?

[balaji.bandi]

I have seen some issue in the past core running on 3750 was 12.X  with 9300 - after o moved the different code switfch the working as expected.

If you having same issue, not necessary same one, but look at the logs and provide more information of config to confirm.

[holden.hemming@us.af.mil]

The 6807 is running as a core but the 9300 is acting as a router. I'm not sure if that changes what is going on between IOS's but i feel that is important info i left out.

[Leo Laohoo]

I'd upgrade the firmware of the 9300 to 16.9.4.

[balaji.bandi]

as suggested by @Leo Laohoo  - upgrade and let us know.