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Date:      Fri, 14 Mar 2008 13:14:40 +0100
From:      Giulio Ferro <auryn@zirakzigil.org>
To:        pyunyh@gmail.com
Cc:        freebsd-net@freebsd.org, Andrew Thompson <thompsa@freebsd.org>
Subject:   Re: VLAN trunking and fragmentation
Message-ID:  <47DA6C30.400@zirakzigil.org>
In-Reply-To: <47DA682E.9010504@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>

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


Thanks again.



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