Enabling Jumbo Frame Support


Jumbo frames are frames that are bigger than the standard Ethernet frame size, which is 1518 bytes (including Layer 2 (L2) header and FCS). The definition of frame size is vendor-dependent, as these are not part of the IEEE standard.


When the jumbo frame feature is enabled on a port, the port can switch large or jumbo frames. This feature optimizes server-to-server performance. The default Maximum Transmission Unit (MTU) frame size is 1548 bytes for all Ethernet ports. The MTU size is increased to 9216 bytes when the jumbo frame feature is enabled on a port.


Jumbo frame support is disabled by default.


To enable jumbo frame support, add the jumbo parameter to the port-config-modify command:


CLI (network-admin@Leaf1) > port-config-modify jumbo