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Re: question about sendmail and bandwidth



Hi Ariel,

>   First of all, there is traffic shaping in the Linux kernel. But, before
> that, I don't really understand something. For example, assume you started
> downloading the linux kernel from somewhere, and while downloading those
> 21MBytes, when you ping the other end of your link, the RTT doesn't grow ?

Well, it does. but here - if I ping netvision before sending email I get 
30ms. pinging to netvision while sending email - gives me 2-3 seconds time.

>
>   I have a 128k frame relay link at home, and a Cisco 2514 router. I think
> you can define traffic classes on both 2500 and 1000 series routers. But,
> as long as there is no kind of classification and QoS, every packet will
> be sent with the same priority, so you wont get better response for
> interactive traffic.

Umm, I see..

ok, thanks,
Hetz


>
>
> --Ariel
>
> > Hi,
> >
> > I'm reconfiguring my system here at my new work, and I have this weird
> > problem, so I want to ask people here about this..
> >
> > The network here has 128K Sifranet line, and everything works ok, until
> > it comes to sending emails (using sendmail)
> >
> > When someone send here email - specially big emails, then our line is
> > going down to its knees.. what I mean is that ping to our ISP (Barak)
> > gives me something like 2-3 seconds!
> >
> > While not sending emails - everything works ok...
> >
> > One solution thatI thought of was reducing the MTU to the mail server.
> > However, I would like to hear other people who had their problems with
> > what solutions they came with...
> >
> > Bandwidth shaping is a problematic issue with our router (Cisco 1000)...
> >
> > Suggestions? comments?
> >
> > Thanks
> > --
> > Hetz Ben Hamo
> > System Administrator
> > Magnifire Websystems Inc.
> >
> > =================================================================
> > To unsubscribe, send mail to linux-il-request@linux.org.il with
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>
> --
> Ariel Biener
> e-mail: ariel@post.tau.ac.il
> PGP(6.5.8) public key http://www.tau.ac.il/~ariel/pgp.html

-- 
Hetz Ben Hamo
System Administrator
Magnifire Websystems Inc.

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