I want to configure my RouterOS for jumbro frames (MTU size 9000).
What I did so far was adjusting the L2MTU and the MTU size to the maximum the device supports (9204) for all interfaces and for my bridge.
My problem: I don't get the difference between L2MTU, Actual MTU and MTU.
My interface and bridge configuration (First interface goes to my router, which only supports MTU of 1500):
Please tell me if this configuration is ok. Maybe adjusting the size to all interfaces / the whole bridge could lead to problems.
Most of my traffic is still based on a default MTU size of 1500. MTU of 9000 is only happening inside my LAN, between a few selected devices.
My goal is to use the jumbo frame MTU only when two supported devices communicate via jumbo frames (Windows network setting set to jumbro frames).
What happens with normal frames that use a MTU of 1500? Will they be forwarded without being adjusted by the switch?
Would be nice to get some answers.
Best regards and thanks