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Re: [PATCH] Configurable tap interface MTU

Previous thread: build #286 failed for 2.6.23-rc6-g0d4cbb5 in linux/arch/i386/mach-voyager/setup.c by Toralf on Tuesday, September 11, 2007 - 10:21 am. (3 messages)

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[view original message]
From: Ed Swierk <eswierk@...>
To: <netdev@...>, <maxk@...>
Cc: <linux-kernel@...>
Subject: [PATCH] Configurable tap interface MTU
Date: Tuesday, September 11, 2007 - 10:42 am

This patch makes it possible to change the MTU on a tap interface.

Increasing the MTU beyond the 1500-byte default is useful for

applications that interoperate with Ethernet devices supporting jumbo

frames.


The patch caps the MTU somewhat arbitrarily at 16000 bytes. This is

slightly lower than the value used by the e1000 driver, so it seems

like a safe upper limit.


Signed-off-by: Ed Swierk <eswierk@arastra.com>


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[view original message]
From: Herbert Xu <herbert@...>
To: Ed Swierk <eswierk@...>
Cc: <netdev@...>, <maxk@...>, <linux-kernel@...>
Subject: Re: [PATCH] Configurable tap interface MTU
Date: Tuesday, September 11, 2007 - 11:29 pm

Please make it 65535 without an Ethernet header and 65521

with an Ethernet header.


Cheers,

--

Visit Openswan at http://www.openswan.org/

Email: Herbert Xu ~{PmV>HI~} <herbert@gondor.apana.org.au>

Home Page: http://gondor.apana.org.au/~herbert/

PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt

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[view original message]
From: Ed Swierk <eswierk@...>
To: Herbert Xu <herbert@...>, <netdev@...>, <maxk@...>, <linux-kernel@...>
Subject: Re: [PATCH] Configurable tap interface MTU
Date: Wednesday, September 12, 2007 - 12:54 pm

Here is a revised patch that allows MTUs up to 65535 for tap

interfaces and up to 65521 for tun interfaces.


(If I set the MTU to 65521 on a tun interface, ping complains "message

too long" when I send a 65521-byte packet; 65520 works okay, though.)


--Ed
[view original message]
From: David Miller <davem@...>
To: <eswierk@...>
Cc: <herbert@...>, <netdev@...>, <maxk@...>, <linux-kernel@...>
Subject: Re: [PATCH] Configurable tap interface MTU
Date: Sunday, September 16, 2007 - 3:22 pm

From: "Ed Swierk" <eswierk@arastra.com>


Applied to net-2.6.24


Please provide a proper Signed-off-by: line and a full

changelog with every patch submission and revision in

the future.


Thanks.


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[view original message]
From: Rick Jones <rick.jones2@...>
To: Ed Swierk <eswierk@...>
Cc: <netdev@...>, <maxk@...>, <linux-kernel@...>
Subject: Re: [PATCH] Configurable tap interface MTU
Date: Tuesday, September 11, 2007 - 1:20 pm

FWIW the OFED 1.2 bits take the MTU of IPoIB up to 65520 bytes :)


rick jones

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Previous thread: build #286 failed for 2.6.23-rc6-g0d4cbb5 in linux/arch/i386/mach-voyager/setup.c by Toralf on Tuesday, September 11, 2007 - 10:21 am. (3 messages)

Next thread: [ PATCH 0/3 ] UML - Three trivial patches for 2.6.24 by Jeff Dike on Tuesday, September 11, 2007 - 10:52 am. (1 message)