> 1) the "HW MTU" used by the NIC and the guts of the driver > 2) the legacy networking (eg IP etc) MTU passed up through the legacy path > 3) the fcoe MTU passed up through the fcoe path > > where 1 is the max of 2,3 Whatever is decided to do is going to be targeted at ixgbe first. The scenario you outlined here is exactly how ixgbe hardware works: - Set HLREG0 to enable jumbo frames. This allows larger frames to be accepted, but doesn't limit them to any minimum size. - Set MHADD (for 82598) or MAXFRS (for 82599 - same register, new name) to indicate what the absolute maximum frame size you will receive. Again, doesn't limit the minimum size. - The networking software can send any size up to MAXFRS (maximum frame size) and the hardware will happily receive it and pass it up the stack. Cheers, -PJ Waskiewicz -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
