FYI - I tested with the https://forum.proxmox.com/threads/opt-in-linux-6-11-kernel-for-proxmox-ve-8-available-on-test-no-subscription.156818/ new 6.11 Opt-In Kernel on two hosts, both on a 10GB Switch. It seems to work (no long term test, but one host was running for more than 5 days)...