What I should be looking for when trying to enable Jumbo Frames in networks that relies on PXE for server booting?
As far as I know I must have:
- Network switch capable of MTU >= 9000
- The ability to enable Jumbo Frames not only on the network interface on the switch but also on the Port Channels and VLANs
- A compatible SO to deal with the higher MTU after the boot process with network bonding and VLANs if needed.
What I don't know exactly is how the network card on a given server would know that the connection is not using the default MTU = 1500 value during the PXE phase. Is it supported? Varies by vendor? It should work out of the box? There's something that should be added to the DHCP server the handles the addresses during boot?