Re: [LARTC] most out of qos

[Stef Coene <stef.coene@docum.org>]

On Wednesday 05 February 2003 22:28, Tomas Bonnedahl wrote:
> well, if tcp throttles down at the point where packets are dropped is of
> course good, but still, when a download is peaking at the maximum speed
> minus a couple kbits, the delay is terrible, that's what i want to change.
> any idea?
You can give the download 98% of the link so there is always 2% available for 
something else.  It also helps to throttle down _all_ incoming bandwidth to 
99% of your link so _you_ are shaping and not your router.  

Stef

>
> regards,
>
> tomas bonnedahl
>
> On Wed, Feb 05, 2003 at 10:13:27PM +0100, Stef Coene wrote:
> > On Wednesday 05 February 2003 16:44, Tomas Bonnedahl wrote:
> > > to get most out of qos in general, would the best thing be to set up
> > > qos on both ends of a bottleneck with both ingress and egress
> > > filtering? the reason for asking is because we have a 2mbit connection
> > > with egress filtering qos, the problem is that we experience most
> > > downloads compared to uploades and therefor the egress filtering doesnt
> > > provide much help.
> > >
> > > what we could do is to get ingress filtering on our side here, but i
> > > dont know how much that would help really, the data has already passed
> > > the bottleneck in the path. so, my question, would i experience any
> > > different delay if adding ingress filtering?
> >
> > Yes.  A tcp connection will throttle down  if you drop packets.  But this
> > is not the same as egress shaping.
> >
> > > it is a 2mbit fiber stub network which looks pretty much like this:
> > >
> > > lan - router - fw - isp - internet
> > >
> > > the egress qos is at the moment at the router which pretty much says
> > > "prioritize interactive sessions".
> > >
> > >
> > > since the filtering for qos is rather simple, just telnet/ssh to a
> > > certain host, should i contact my isp and ask them to set some egress
> > > qos going to our network on the cisco router that is at their place?
> > > btw, anyone know how good the qos is on cisco 2600?
> >
> > I have no idea how the qos works on cisco router.
> > Just give it a try and se what happens.
> >
> > Stef
> >
> > --
> >
> > stef.coene@docum.org
> >  "Using Linux as bandwidth manager"
> >      http://www.docum.org/
> >      #lartc @ irc.oftc.net
>
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-- 

stef.coene@docum.org
 "Using Linux as bandwidth manager"
     http://www.docum.org/
     #lartc @ irc.oftc.net

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