Date: Mon, 16 Jul 2007 12:56:13 -0400 From: Stephen Clark <Stephen.Clark@seclark.us> To: Wes Peters <barnaclewes@gmail.com> Cc: freebsd-net@freebsd.org, Sten Daniel Soersdal <netslists@gmail.com> Subject: Re: 6.2 mtu now limits size of incomming packet Message-ID: <469BA32D.8040706@seclark.us> In-Reply-To: <f83770800707160948q2ee20317u64917e02c045eb3d@mail.gmail.com> References: <46967C5C.5040505@seclark.us> <469772DA.1000700@gmail.com> <46977741.8090301@seclark.us> <4698D290.5080004@gmail.com> <46992021.8090603@seclark.us> <469B9516.2090904@gmail.com> <f83770800707160948q2ee20317u64917e02c045eb3d@mail.gmail.com>
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Wes Peters wrote: >On 7/16/07, Sten Daniel Soersdal <netslists@gmail.com> wrote: > > >>I guess it wouldn't hurt for the operating system to accept larger >>frames, as long as only the correctly sized frames are transmitted. >> >>There are alot of people, including myself, that assume a host can't >>receive a frame that is larger than MTU. Perhaps it should be noted in >>the man pages about this behavior in addition? >> >> > >I've bumped into this issue several times before. A look at the >ifconfig man page will show a way to set the interface mtu, but not >the mru. FreeBSD has always used the mtu as the mru for the > > This is not the case in FreeBSD 4.9 - It would gladly accept packets on an interface that were larger than the MTU for that interface. >interface, which is arguably wrong. In every case I've encountered >this problem, the user had truly mis-configured some part of the >network and correct configuration solved the problem, so I've never >been fully convinced it needed to be fixed. > > > > -- "They that give up essential liberty to obtain temporary safety, deserve neither liberty nor safety." (Ben Franklin) "The course of history shows that as a government grows, liberty decreases." (Thomas Jefferson)
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