From: Rick Jones <rick.jones2@hp.com>
To: Loic Prylli <loic@myri.com>
Cc: Bryan Lawver <lawver1@llnl.gov>,
Linux Network Development list <netdev@vger.kernel.org>,
Bill Fink <billfink@mindspring.com>,
mst@dev.mellanox.co.il, general@lists.openfabrics.org
Subject: Re: [ofa-general] Re: IPoIB forwarding
Date: Tue, 01 May 2007 15:12:08 -0700 [thread overview]
Message-ID: <4637BB38.9020809@hp.com> (raw)
In-Reply-To: <4637B9A4.2050103@myri.com>
Loic Prylli wrote:
> On 4/30/2007 2:12 PM, Rick Jones wrote:
>
>>
>> Speaking of defaults, it would seem that the external 1.2.0 driver
>> comes with 9000 bytes as the default MTU? At least I think that is
>> what I am seeing now that I've started looking more closely.
>>
>> rick jones
>
>
>
> That's the same for the in-kernel-tree code (9K MTU by default).
> Assuming this is not wanted, I will submit a patch for that.
While I like what that does for perrformance, and at the risk of putting
words into the mouths of netdev, I suspect that 1500 bytes is indeed the
desired default. It matches the IEEE specs, I've yet to see a switch
which enabled "Jumbo Frames" by default, not everything out there even
believes that Jubmo Frames means 9000 byte MTU etc etc etc. I think
that 1500 bytes for an "Ethernet" device remains in line with the
principle of least surprise.
rick jones
next prev parent reply other threads:[~2007-05-01 22:12 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <6.1.2.0.2.20070423160212.12db6400@mail.llnl.gov>
[not found] ` <20070425124652.GG1624@mellanox.co.il>
[not found] ` <6.1.2.0.2.20070426083410.1389d9e0@mail.llnl.gov>
[not found] ` <20070426161409.GF15540@mellanox.co.il>
[not found] ` <6.1.2.0.2.20070426095112.138e9a68@mail.llnl.gov>
[not found] ` <20070426180618.GJ15540@mellanox.co.il>
[not found] ` <6.1.2.0.2.20070427115435.13ea5ec0@mail.llnl.gov>
2007-04-27 20:32 ` [ofa-general] Re: IPoIB forwarding Rick Jones
2007-04-27 22:26 ` Bryan Lawver
2007-04-27 22:32 ` Rick Jones
2007-04-27 22:43 ` Bryan Lawver
2007-04-27 23:37 ` Rick Jones
2007-04-27 23:39 ` David Miller
2007-04-27 23:48 ` Rick Jones
2007-04-27 23:52 ` David Miller
2007-04-30 17:16 ` Rick Jones
2007-05-01 22:43 ` [PATCH] make myri10ge use default MTU of 1500 bytes Loic Prylli
2007-04-28 6:51 ` [ofa-general] Re: IPoIB forwarding Bill Fink
2007-04-29 19:40 ` Loic Prylli
2007-04-30 21:12 ` Rick Jones
2007-05-01 22:05 ` Loic Prylli
2007-05-01 22:12 ` Rick Jones [this message]
2007-05-03 23:37 ` Bryan Lawver
2007-04-30 17:07 ` Rick Jones
2007-05-01 5:57 ` Bill Fink
2007-05-01 16:26 ` Loic Prylli
2007-04-28 2:35 ` parks
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