Re: [tcmtf] Improvements in TCM-TF according to the received comments: Problem 2: Path MTU

"Jose Saldana" <jsaldana@unizar.es> Tue, 18 February 2014 08:39 UTC

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From: "Jose Saldana" <jsaldana@unizar.es>
To: "'Luigi Iannone'" <ggx@gigix.net>
References: <007b01cf226a$a41cc3a0$ec564ae0$@unizar.es> <D959304F-0E24-4AAC-9178-D7981BDF6B73@gigix.net>
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Date: Tue, 18 Feb 2014 09:38:53 +0100
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Subject: Re: [tcmtf] Improvements in TCM-TF according to the received comments: Problem 2: Path MTU
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Luigi,
 
In some research papers we have somewhat considered the problem of the MTU.
I mean, let' suppose you have a high number of flows to be optimized
together. Then, you define a period to multiplex them. But it may happen
that, before ending the period, you have enough small packets so as to fill
an MTU-sized multiplexed one. At that point, you should end that period,
send the packet and start a new period. If you include a size threshold in
addition to the period, the method is better.
 
However, perhaps this is just an implementation issue. Do you think we
should recommend this in the documents:
- know the maximum MTU
- use it in addition to the Period in order to trigger the sending of the
multiplexed packet.
 
Thanks!
 
Jose
 
De: Luigi Iannone [mailto:ggx@gigix.net] 
Enviado el: lunes, 10 de febrero de 2014 16:40
Para: Jose Saldana
CC: tcmtf@ietf.org; tsv-area@ietf.org
Asunto: Re: [tcmtf] Improvements in TCM-TF according to the received
comments: Problem 2: Path MTU
 
Hi,
 
On 5 Feb. 2014, at 13:06 , Jose Saldana < <mailto:jsaldana@unizar.es>
jsaldana@unizar.es>; wrote:



Problem:
 
Gorry: Perhaps we should also look at PMTU issues?
 
In TCMTF?  I would avoid that. MTU is a common problem for any tunnelling
mechanism I would more support a "tunnel-spefici-independent" solution
(probably to be discussed elsewhere).
 
ciao
 
L.
 
 



Al: Yes. The operations considerations should be thought about.
 
Solution: (see this thread:
<http://www.ietf.org/mail-archive/web/tcmtf/current/msg00422.html>
http://www.ietf.org/mail-archive/web/tcmtf/current/msg00422.html)
The current charter talks about MTU in number 7.
 
 
Jose 
 
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