On Thu, Mar 16, 2006 at 08:42:09AM -0800, Jack Vogel wrote: > On 3/16/06, Yuriy N. Shkandybin <[EMAIL PROTECTED]> wrote: > > Hello > > > > I have 2 freebsd servers connected by dedicated wire via em interfaces. > > systems = 6.1-PRERELEASE #0: Tue Mar 14 11:58:23 MSK 2006 > > > > 1st) > > man em says > > MTU size for Jumbo Frames is 16114 and i'm sure i've setup this on > > freebsd-5 and probably ealier 6.0 > > But now > > ifconfig em1 mtu 16114 > > ifconfig: ioctl (set mtu): Invalid argument > > 16110 - max possible > > With newer hardware the FIFO has been getting smaller, so jumbos > even this large wont be allowed, I'm away from the code right now > but on the 82571 adapter its max is in the 9K range. > > And the man page is more than likely out of date. > > Whether you can do jumbos at all, and if so, what size you are allowed > to make them is adpater specific. > > Jack
The maximum MTU size for 82571 and 82572 based adapters is 10,482. 82573 has no Jumbo support and the rest can have up to 16k. _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "[EMAIL PROTECTED]"
