[ale] PPP Perfromance

[James P. Kinney III]

On Thu, 2003-10-30 at 21:52, Ryan wrote:
> I thought MRU and MTU were things that ppp negotiates automatically when
> bringing the link up. Is there any benefit to forcibly setting them? Or
> are they required to give ppp an idea of what to say during that
> negotiation?
> 
I'm 99% certain that mtu and mru are NOT "negotiated" during setup of a
PPP link. That would be a slick feature!! There are some general
guidelines that are based on the transport mechanism involved. I would
guess that the PPP-HowTo would be an OK place to start for tweaking
Linux toys. Google seems good at finding arcane numbers. Here's a good
article that outline some of the tweaks (and frustrations) of tuning a
ppp link for speed.

http://www.internetweekly.org/llarrow/mtumss.html

> > It greatly depends on the system you are connecting through.
> >
> > For Bellsouth DSL (PPPoE) it was something around 1500. But packet sizes
> > need to be smaller for slower transfer mediums like dial-up. If 1024
> > works well, bump it up a bit and re-test. If the through-put rate goes
> > up, bump it up again. If it goes down, back it down.
> >
> > On Thu, 2003-10-30 at 07:38, Christopher Fowler wrote:
> >> I'm twaeking my ppp performance.  What is the proper mtu and mru
> >> settings?
> >> Right now I've got them at 1024 each.
> >> _______________________________________________
> >> Ale mailing list
> >> Ale at ale.org
> >> http://www.ale.org/mailman/listinfo/ale
> > --
> > James P. Kinney III          \Changing the mobile computing world/
> > CEO & Director of Engineering \          one Linux user         /
> > Local Net Solutions,LLC        \           at a time.          /
> > 770-493-8244                    \.___________________________./
> > http://www.localnetsolutions.com
> >
> > GPG ID: 829C6CA7 James P. Kinney III (M.S. Physics)
> > <jkinney at localnetsolutions.com>
> > Fingerprint = 3C9E 6366 54FC A3FE BA4D 0659 6190 ADC3 829C 6CA7
> > _______________________________________________
> > Ale mailing list
> > Ale at ale.org
> > http://www.ale.org/mailman/listinfo/ale
> >
> 
> _______________________________________________
> Ale mailing list
> Ale at ale.org
> http://www.ale.org/mailman/listinfo/ale
-- 
James P. Kinney III          \Changing the mobile computing world/
CEO & Director of Engineering \          one Linux user         /
Local Net Solutions,LLC        \           at a time.          /
770-493-8244                    \.___________________________./
http://www.localnetsolutions.com

GPG ID: 829C6CA7 James P. Kinney III (M.S. Physics)
<jkinney at localnetsolutions.com>
Fingerprint = 3C9E 6366 54FC A3FE BA4D 0659 6190 ADC3 829C 6CA7
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: This is a digitally signed message part