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

[Philippe M. <ph...@oz...>]

I checked the ethernet interface is set to 1500 and the ppp0 interface
to 1492 by pppd.
This is the same on both versions.

I checked the routing, the firewall script, the sysctl.conf file...

I'm at a loss

Philippe

On Tue, Apr 05, 2011 at 10:13:05AM -0400, Fred Frigerio wrote:
> 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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> 	  Heiko Zuerker
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