RE: Qos/TrafficShaping(on Shorewall) Howto available for Web-viewing

[Ow Mun Heng]

>  -----Original Message-----
>  From: fedora-list-bounces(a)redhat.com
>  [mailto:[e-mail]]On Behalf Of Homer
>  Sent: Friday, April 30, 2004 3:35 AM
>  To: For users of Fedora Core releases
>  Subject: RE: Qos/TrafficShaping(on Shorewall) Howto available for
>  Web-viewing
>  
>  
>  On Wed, 2004-04-28 at 21:08, Ow Mun Heng wrote:
>  
>  > Actually, I updated the docs yesterday. I did mention that 
>  we can perform 
>  > QoS on incoming connection but that would really mean, 
>  either dropping 
>  > packets as they come in or severely limitting your 
>  downstream bandwidth.
>  > 
>  > I don't really think you can somehow Shape what your ISP sends you 
>  > unless you have access to the ISP's routers etc.
>  > 
>  > If I am mistake, please educate me. 
>  
>  	Since I am the ISP ;) None the less, you will drop some 
>  packets in the
>  download, but... As best as I know, when you don't ACK the packets to
>  the sending machine, it'll slow down the transport until the ACKs keep
>  up... 
Hey.. Since you're the ISP.. May I ask you a question?

Say I'm with ISP X, and I'm subscribed to their 384/128k package.
They say it's best effort. I want to know, how do they Cap the connection
to the said 384k.

What sort of trafficshaping etc do they do? TCP Window shaping?
Packet dropping?? ACKs??

Qos/TrafficShaping(on Shorewall) Howto available for Web-viewing

[Homer]

On Thu, 2004-04-29 at 21:19, Ow Mun Heng wrote:


>  Hey.. Since you're the ISP.. May I ask you a question?
>  
>  Say I'm with ISP X, and I'm subscribed to their 384/128k package.
>  They say it's best effort. I want to know, how do they Cap the connection
>  to the said 384k.
>  
>  What sort of trafficshaping etc do they do? TCP Window shaping?
>  Packet dropping?? ACKs?? 
	I've got an old RH 6.x box using cbq to do the shaping ;) There are
commercial packages, but since I'm a little fish in a big sea, I opted
to roll my own... It seems to work rather well, though it's time to
replace that box, it's been running 4 years now... I like some of the
QOS I can do with the newer kernels..

-- 
Homer <hparker(a)homershut.net&gt;

Qos/TrafficShaping(on Shorewall) Howto available for Web-viewing

[Tim Sheets]

Ow Mun Heng wrote:


>  
>  Hey.. Since you're the ISP.. May I ask you a question?
>  
>  Say I'm with ISP X, and I'm subscribed to their 384/128k package.
>  They say it's best effort. I want to know, how do they Cap the connection
>  to the said 384k.
>  
>  What sort of trafficshaping etc do they do? TCP Window shaping?
>  Packet dropping?? ACKs?? 
I'm not the one you asked, but what the heck....

The group I work for isn't your typical ISP (state funded educational 
network), but most of our clients connect with T1 or similar.  We use 
Cisco gear, and limit bandwidth with class based policies in most cases, 
and "old fasioned" rate limits in others.

Basically, define the limit and, where applicable, define special 
traffic to get priority (H.323) and stamp/pass that, drop what exceeds 
the limit (very simplified explanation).  Since we don't do much in the 
way of DSL, I am not sure how that equipment is configured to limit traffic.

Tim

Qos/TrafficShaping(on Shorewall) Howto available for Web-viewing

[Lamar Owen]

On Thursday 29 April 2004 22:19, Ow Mun Heng wrote:
>  Hey.. Since you're the ISP.. May I ask you a question? 
>  Say I'm with ISP X, and I'm subscribed to their 384/128k
> package.
>  They say it's best effort. I want to know, how do they Cap the connection
>  to the said 384k. 
>  What sort of trafficshaping etc do they do? TCP Window shaping?
>  Packet dropping?? ACKs?? 
My ISP does the traffic shaping on the ATM side of the DSL.  So it's at the 
cell level below IP.  ATM is considerably more flexible in this regard.
-- 
Lamar Owen
Director of Information Technology
Pisgah Astronomical Research Institute
1 PARI Drive
Rosman, NC  28772
[phone]
www.pari.edu