On Mar 13, 2006, at 2:57 PM, Sean Murphy wrote:
How do I set Jumbo Frames on a Gigabit NIC in FreeBSD?

   ifconfig _device_ mtu 8192

...where you would use em0, bge0, or whatever the actual interface device is.
See the manpages for the various devices, for example "man em":

Support for Jumbo Frames is provided via the interface MTU setting. Selecting an MTU larger than 1500 bytes with the ifconfig(8) utility con- figures the adapter to receive and transmit Jumbo Frames. The maximum
     MTU size for Jumbo Frames is 16114.

...which usually will discuss the MTU sizes the specific devices can handle.

--
-Chuck

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