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Message-ID: <20121113133353.227ec987@nehalam.linuxnetplumber.net> Date: Tue, 13 Nov 2012 13:33:53 -0800 From: Stephen Hemminger <shemminger@...tta.com> To: David Miller <davem@...emloft.net> Cc: alexander.h.duyck@...el.com, netdev@...r.kernel.org Subject: Re: [PATCH] vxlan: Fix error that was resulting in VXLAN MTU size being 10 bytes too large On Tue, 13 Nov 2012 14:37:19 -0500 (EST) David Miller <davem@...emloft.net> wrote: > From: Alexander Duyck <alexander.h.duyck@...el.com> > Date: Fri, 09 Nov 2012 15:35:24 -0800 > > > This change fixes an issue I found where VXLAN frames were fragmented when > > they were up to the VXLAN MTU size. I root caused the issue to the fact that > > the headroom was 4 + 20 + 8 + 8. This math doesn't appear to be correct > > because we are not inserting a VLAN header, but instead a 2nd Ethernet header. > > As such the math for the overhead should be 20 + 8 + 8 + 14 to account for the > > extra headers that are inserted for VXLAN. > > > > Signed-off-by: Alexander Duyck <alexander.h.duyck@...el.com> > > Applied, thanks for the detailed commit message. Probably need smarter code there to look at header length requirement of underlying device as well, maybe someone will be perverse and runn vxlan over a tunnel or IPoIB. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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