netdev - Re: send/receive data via eth0/1 external loop ?

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Date:	Sat, 12 Nov 2011 19:50:33 +0100 (CET)
From:	"Roland Kletzing" <devzero@....de>
To:	"Julian Anastasov" <ja@....bg>
Cc:	netdev@...r.kernel.org
Subject: Re: send/receive data via eth0/1 external loop ?

great, thanks!


-----Ursprüngliche Nachricht-----
Von: "Julian Anastasov" <ja@....bg>
Gesendet: 12.11.2011 19:31:13
An: "Roland Kletzing" <devzero@....de>
Betreff: Re: send/receive data via eth0/1 external loop ?

>
> Hello,
>
>On Sat, 12 Nov 2011, Roland Kletzing wrote:
>
>> Hello,
>> i`m searching for a while now, but i did not find a solution, so forgive when
>> i`m (as a user) asking for expert help here.
>>
>> I want to do some network stress/burn-in and quality/reliability testing,
>> i.e. i want to send/receive large amounts of data trough the systems network
>> interfaces without the need of hogging the net or other systems.
>>
>> so, that test should run "loopback", i.e. connecting eth0+1 via crossover cable
>> or via locally attached switch. I don`t want to use a second system for that.
>>
>> testing at ip/tcp level would be favourable , but raw eth level would be also fine.
>>
>> But how ?
>> What appears simple on a first view, seems to be difficult.... :(
>>
>> All i came across is this report:
>> http://www.zyztematik.com/?p=10
>> and this description of a patch:
>> http://www.ssi.bg/~ja/send-to-self.txt
>>
>> Does somebody know a proper way of achieving this without patching the
>> kernel ?
>
> You can use accept_local flag and rule with pref 0:
>
>http://marc.info/?l=linux-netdev&m=125983955627148&w=2
>
>Regards
>
>--
>Julian Anastasov <ja@....bg>


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