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Date:      Fri, 14 Mar 2008 21:28:14 +0900
From:      Pyun YongHyeon <pyunyh@gmail.com>
To:        Giulio Ferro <auryn@zirakzigil.org>
Cc:        freebsd-net@freebsd.org, Andrew Thompson <thompsa@freebsd.org>
Subject:   Re: VLAN trunking and fragmentation
Message-ID:  <20080314122814.GH22788@cdnetworks.co.kr>
In-Reply-To: <47DA6C30.400@zirakzigil.org>
References:  <47D7C34E.8060805@zirakzigil.org> <47D817D2.9010306@errno.com> <47D8499A.5070605@zirakzigil.org> <20080313033029.GF16972@cdnetworks.co.kr> <47D92F9D.4070701@zirakzigil.org> <20080314001704.GA22788@cdnetworks.co.kr> <47DA4DCD.6050304@zirakzigil.org> <20080314101555.GF22788@cdnetworks.co.kr> <47DA682E.9010504@zirakzigil.org> <47DA6C30.400@zirakzigil.org>

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On Fri, Mar 14, 2008 at 01:14:40PM +0100, Giulio Ferro wrote:
 > Giulio Ferro wrote:
 > >That's it!
 > >Now seems to work properly, the problem then is with hardware tagging.
 > >
 > >My question now is: can I use vlans without htag in a complex system with
 > >heavy traffic without a significant performance loss? If not, how much 
 > >will it
 > >take to fix the issue with the driver?
 > >
 > 
 > 
 > There's seems to be another problem now.
 > 
 > If I send flood pings to the other host with big packets (say 2000 
 > bytes) it works, but one
 > packet out of 4 or 5 takes a huge time to round-trip (about 1000ms), 
 > whereas the rest
 > of the packets have a reasonable 0.2 ms average...
 > 
 > 
 > I fear this may lead to unacceptable performance for real-time protocols 
 > (ie voip) in a
 > production environment.
 > 
 > Do you think the problem is localized in the "re" driver? If so I could 

Yes.

 > just change the
 > network interface and be done with that. (In production I can use bge 
 > cards).
 > 
 > 
 > Thanks again.

-- 
Regards,
Pyun YongHyeon



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