netdev - Re: UDP path MTU discovery

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Message-ID: <20100330141237.GP20695@one.firstfloor.org>
Date:	Tue, 30 Mar 2010 16:12:37 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	"Edgar E. Iglesias" <edgar.iglesias@...il.com>
Cc:	Andi Kleen <andi@...stfloor.org>,
	"Templin, Fred L" <Fred.L.Templin@...ing.com>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Rick Jones <rick.jones2@...com>, Glen Turner <gdt@....id.au>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: UDP path MTU discovery

> Where does the application controllable per socket MTU come into the
> picture?

To set the minimum path MTU so that there is a guarantee that IPv6 routers
(which are unable to fragment themselves) will never drop it.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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