Using jumbo frames
Enabling jumbo frames on the networks used for vMotion or IP Storage can increase performance and throughput. When jumbo frames are configured, iSCSI or NFS packets can be transferred over the network in a single frame; there is no fragmentation. This decreases the amount of CPU overhead required to encapsulate and de-encapsulate IP storage packets.
How to do it…
Determine use cases to enable jumbo frames.
Configure jumbo frames on virtual switches.
Configure jumbo frames on VMkernel ports.
Ensure jumbo frames are configured end to end on the physical network: physical switches and array network interfaces.
Test the network for proper end-to-end jumbo frames configuration.
How it works…
Jumbo frames must be supported and enabled on the network from end to end; this includes the physical network infrastructure as well. In vSphere, jumbo frames are enabled either in the vSwitch configuration or on the vDSwitch uplinks by setting the Maximum Transmission Unit (MTU) value to 9000...
