From: Rick Jones <rick.jones2@hp.com>
To: David Miller <davem@davemloft.net>
Cc: rgetz@blackfin.uclinux.org, netdev@vger.kernel.org
Subject: Re: Jumbo frame question...
Date: Fri, 24 Jul 2009 09:39:43 -0700 [thread overview]
Message-ID: <4A69E3CF.1040805@hp.com> (raw)
In-Reply-To: <20090724.093243.201296391.davem@davemloft.net>
David Miller wrote:
> From: Robin Getz <rgetz@blackfin.uclinux.org>
> Date: Fri, 24 Jul 2009 11:41:55 -0400
>
>>Should a gigabit card, configured as 100, be sending jumbo UDP frames?
>>
>>My understanding, is no - this is a spec violation..
In so far as there is no de jure spec for Jumbo Frames, it is rather difficult
to have a spec violation :).
> There is nothing wrong with supporting jumbo frames
> when the speed is lower than 1GB.
>
> If you configure the MTU to be jumbo size, it should
> be no surprise to you that this is what gets used.
Not a case of too much rope? Given that (IIRC) Jumbo Frame was not introduced
in Ethernet NICs until Gigabit came along (eg Alteon), the chances a (legacy)
100 Mbit/s network would have JF-capable NICs is epsilon.
rick jones
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next prev parent reply other threads:[~2009-07-24 16:39 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-24 15:41 Jumbo frame question Robin Getz
2009-07-24 16:32 ` David Miller
2009-07-24 16:39 ` Rick Jones [this message]
2009-07-24 18:21 ` Robin Getz
2009-07-24 18:44 ` Rick Jones
2009-07-24 19:13 ` Eric Dumazet
2009-07-25 12:34 ` Robin Getz
2009-07-25 14:25 ` Eric Dumazet
2009-07-24 18:45 ` Lennart Sorensen
2009-07-25 3:28 ` Herbert Xu
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