Date: Tue, 27 Jul 2010 10:15:19 -0700 From: Pyun YongHyeon <pyunyh@gmail.com> To: Lev Serebryakov <lev@freebsd.org> Cc: freebsd-net@freebsd.org Subject: Re: does if_vr export true packet error statistics? Message-ID: <20100727171519.GA6209@michelle.cdnetworks.com> In-Reply-To: <5610530046.20100727091422@serebryakov.spb.ru> References: <5610530046.20100727091422@serebryakov.spb.ru>
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On Tue, Jul 27, 2010 at 09:14:22AM +0400, Lev Serebryakov wrote:
> Hello, Freebsd-net.
>
> I have huge losses ("netstat -s -p tcp" shows 4% of packets, but
> 35% of bytes are retransmitted) on my intenret connection, which is PPPoE over
> 100Mbit ehternet link. Provider claims, that it is physical level
> problem, and I should fix my cables in my network. But `netstat -i' shows
> 0 input errors / 0 output errors / 0 collistion on physical
> interface, which is if_vr.
>
> Could I belive in these stats? Does if_vr export proper error
> statistics?
>
I think so. You can also check more detailed statistics of vr(4)
with sysctl(8).
#sysctl dev.vr.0.stats=1
But I guess you wouldn't see errors there. To me, your issue looks
like wrongly advertised MSS which could be triggered by incorrect
MTU/MRU configuration of PPPoE. Check your PPPoE configuration.
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