Date: Wed, 21 Mar 2018 09:32:41 -0400 From: "Joseph H. Buehler" <jhpb@cox.net> Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> Subject: Re: netmap ixgbevf max frame size Message-ID: <5AB25EF9.4080100@cox.net> In-Reply-To: <5AB25533.3020003@cox.net> References: <5AAC49BE.3030508@cox.net> <5AAC4A96.1040107@cox.net> <5AB01439.3090003@cox.net> <Q8MS1x00g3ftU9t018MSnu> <5AB25533.3020003@cox.net>
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This turned out to be a limitation of the box we are using, there is apparently hardware between the ixgbevf chip and the fiber. Joe Buehler > 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. > > Joe Buehler > >
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