Jumbro Frames not working on Proxmox 6?

[Jochen Schüler]

Have a new install with Proxmox 6 on 3 Cluster Members. Ceph works fine until MTU is set to 9000. We have the same config at the same 10GB NetGear switch with Proxmox 5.x working well set MTU to 9000.

 

[spirit]

do you have some specific error logs ?
ceph should works fine with mtu 9000.