We have two CCR2004s in production, both on V6 and connected with 25g Sfp28s. These ones specifically https://www.fs.com/products/85125.html? ... &id=359194
This setup works great, however, when we try and move one of the routers to V7 we can not get the 25g link to come back up. 10gig links work fine on other ports, but the one 25g link is no go no matter what we do. The dbm settings are within their normal range. Also tried forcing link negotiation, but no luck there either.
We rolled the router back to V6 and everything works great again. Any ideas?