Joseph H. Buehler wrote this message on Wed, Mar 21, 2018 at 09:32 -0400: > This turned out to be a limitation of the box we are using, there is > apparently hardware between the ixgbevf chip and the fiber.
I've written a program that will probe the sizes that work successfully, set the route's MTU properly. This is designed for FreeBSD, but should be adaptable to Linux, assuming it has similar features: https://github.com/jmgurney/automtud > > I am unable to send frames larger than 9216 bytes (destination MAC through > > trailing CRC inclusive) using ixgbevf hardware with latest netmap code > > (LINUX). > > > > What is the source of this limitation? From the chip datasheet it appears > > that much larger frames are supported. > > > > There is mention of 9216 in some of the driver source files but as an MTU, > > the max frame size is larger. -- John-Mark Gurney Voice: +1 415 225 5579 "All that I will do, has been done, All that I have, has not." _______________________________________________ freebsd-net@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
