Re: [Devil-Linux-discuss] Very poor performance of ppp 2.4.5

[Fred F. <ffr...@lo...>]

Well since you are stuffing an IP packet inside another, in order to avoid
splitting packets you want to set the MTU to 1492 so that the 'space' used
by the encapsulating package is taken into account. That's the way I
understand it. But that is for the packets that get encapsulated, you don't
want to reduce the MTU on the encapsulating ones. I guess what I am saying
is make sure you are reducing the MTU on the correct interface.

-----Original Message-----
From: Bruce Smith [mailto:bw...@re...] 
Sent: Tuesday, April 05, 2011 8:40 AM
To: dev...@li...
Subject: Re: [Devil-Linux-discuss] Very poor performance of ppp 2.4.5

I thought you were supposed to set pppd's MTU to 1492 (or some slightly less
value) to allow for something in the header.  Or something like that ...
it's been a long time since I dealt with pppd -- back in my dialup days.

 - BS



On Tue, Apr 5, 2011 at 08:22, Heiko Zuerker <he...@zu...> wrote:


	Hey,
	
	1.4.2 also has the 2.6 kernel, which changes things quite a bit.
	I try things like forcing the MTU size to like 1500, see if that
	changes anything.
	
	Heiko
	

	Quoting Philippe Marzouk <ph...@oz...>:
	> Hi,
	>
	> I have very poor performance for my ADSL connection with ppp 2.4.5
on
	> DL 1.4.2.
	>
	> I tried on an official 1.4.2 i686 and after recompiling with ipv6
	> support.
	>
	> For example, the ping time to my ISP webserver is stable around 25
ms
	> with the old ppp 2.4.3 version in the a DL 1.3.4 from 2007 while
with DL
	> 1.4.2 I get erratic times and often more than 1 second.
	>
	> Has anyone experienced this ?
	>
	> Philippe
	>
	>
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	Regards
	  Heiko Zuerker
	  http://www.devil-linux.org
	
	
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