From: Eric Dumazet <eric.dumazet@gmail.com>
To: Rick Jones <rick.jones2@hp.com>
Cc: "Edgar E. Iglesias" <edgar.iglesias@gmail.com>,
Andi Kleen <andi@firstfloor.org>, Glen Turner <gdt@gdt.id.au>,
netdev@vger.kernel.org
Subject: Re: UDP path MTU discovery
Date: Mon, 29 Mar 2010 23:29:12 +0200 [thread overview]
Message-ID: <1269898152.1958.86.camel@edumazet-laptop> (raw)
In-Reply-To: <4BB11510.9000302@hp.com>
Le lundi 29 mars 2010 à 14:01 -0700, Rick Jones a écrit :
> I would get the alphabet soup completely garbled, but the DNS folks are talking
> about EDNS (?) message sizes upwards of 4096 bytes - encryption/authentication
> and other angels being asked to dance on the head of the DNS pin are asking for
> more and more space in the messages.
>
> So, someone will have to blink somewhere - either DNS will have to go TCP and
> *possibly* take RTT hits there depending on various patch streams, or the IEEE
> will have to sanction jumbo frames and people deploy them widely, or it will
> have to become feasible to actually do the occasional IPv6 datagram
> fragmentation and get a timely retransmission out of a UDP application on a PMTU
> hit.
>
1) 4096 bytes UDP messages... well...
2) Using regular TCP for DNS servers... well...
I believe some guys were pushing TCPCT (Cookie Transactions) for this
case ( http://tools.ietf.org/html/draft-simpson-tcpct-00.html )
(That is, using an enhanced TCP for long DNS queries... but not only for
DNS...)
next prev parent reply other threads:[~2010-03-29 21:29 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-26 0:02 UDP path MTU discovery Glen Turner
2010-03-26 0:53 ` Rick Jones
2010-03-26 3:26 ` David Miller
2010-03-26 17:48 ` Rick Jones
2010-03-31 23:42 ` Glen Turner
2010-03-31 23:51 ` Hagen Paul Pfeifer
2010-04-01 0:06 ` Rick Jones
2010-03-26 3:24 ` David Miller
2010-03-28 8:41 ` Andi Kleen
2010-03-31 23:57 ` Glen Turner
2010-04-01 0:57 ` Andi Kleen
2010-03-28 8:50 ` Andi Kleen
2010-03-29 17:01 ` Rick Jones
2010-03-29 20:14 ` Andi Kleen
2010-03-29 20:25 ` Rick Jones
2010-03-29 20:50 ` Edgar E. Iglesias
2010-03-29 21:01 ` Rick Jones
2010-03-29 21:29 ` Eric Dumazet [this message]
2010-03-29 23:38 ` Templin, Fred L
2010-03-30 5:20 ` Andi Kleen
2010-03-30 6:06 ` Eric Dumazet
2010-03-30 6:16 ` Andi Kleen
2010-03-30 6:17 ` UDP path MTU discovery II Andi Kleen
2010-03-30 6:16 ` UDP path MTU discovery Edgar E. Iglesias
2010-03-30 6:19 ` Andi Kleen
2010-03-30 8:20 ` Edgar E. Iglesias
2010-03-30 14:12 ` Andi Kleen
2010-03-30 22:04 ` Edgar E. Iglesias
2010-03-30 15:58 ` Templin, Fred L
2010-03-30 16:06 ` Andi Kleen
2010-03-31 23:43 ` Glen Turner
2010-04-01 0:55 ` Andi Kleen
2010-04-02 5:41 ` Glen Turner
2010-04-04 10:25 ` Andi Kleen
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