From owner-freebsd-questions@FreeBSD.ORG  Wed Feb 14 08:07:16 2007
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From: Josh Paetzel <josh@tcbug.org>
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Date: Wed, 14 Feb 2007 02:07:14 -0600
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Cc: sai <sonicsai@gmail.com>
Subject: Re: kernel: vr0: discard oversize frame
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On Tuesday 13 February 2007 23:47, sai wrote:
> (apologies if this is an inappropriate list for this, I am
> relatively new to FreeBSD )
>
> I get this error quite frequently  on my pf firewall running 6.2
> and it leads to loss of internet access.
> kernel: vr0: discard oversize frame (ether type 710a flags 3 len
> 1532
>
> > max 1514)
>
> vr0 is connected to my ISPs cable modem, ip address is provided by
> DHCP. Whenever I get this oversized (or maybe malformed) packet I
> need to reboot my machine to get back online, though sometimes just
> resetting (down,  then up) the ethernet port works also.
>
> The machine also has rl ethernet cards and they also suffer from
> the same problem. It is not possible to change the ethernet cards
> as the machine is an appliance.
>
> Any pointers/suggestions/help?
>
> sai

I don't have any vr or rl cards, but see if you can increase the MTU 
on them.  See the ifconfig manpage for details on how to do so.  
Obviously you'd want to set it to at least 1532. :)

-- 
Thanks,

Josh Paetzel