Yasser,

-HQ = 1MBit/s to Internet
-HQ has four links to branches, each branch link = 1Mbit/s
-Each branch will go through the HQ to reach the HQ, as well
 as other branches
-Each branch will access the Internet through the HQ

I hope I've got it right so far!? =]

One easy way to do this would be to decide on a traffic-shaping,
or policing policy for each site.  Let's say I've decided
to give each site 256Kbit/s access to the Internet (slightly
oversubscribe my network 4*256=1024).  Therefore, I need
to tell the router that traffic destined for the Internet
must be either shaped or policed to that rate.

If the company has been using a good addressing scheme it should be rather
easy to distinguish between traffic destined for the company
network, versus the internet.  To do this, simply right an access-list
matching the networks of the company.  Let's say they're using rfc1918
10.0.0.0/8 space.  Simply write up an access-list denying the 10 space (you
might want to include addressing necessary for a dynamic routing protocol
you might have in use).  Then put a permit any at the end.
This will deny policing or shaping the company space, and will shape/police
the Internet traffic.

Then, just apply your shaping/policing with the modular QoS, a traffic-shape
on the interface, or a rate-limit.

If you would like configuration examples, let me know.

Take care,
-Mark


-----Original Message-----
From: YASSER ALY [mailto:[EMAIL PROTECTED]]
Sent: Monday, August 12, 2002 2:00 PM
To: [EMAIL PROTECTED]
Subject: Using QoS to Control Utilization [7:51254]


Hi Group   I need your suggestions regarding the following Scenario.A
company's main Branch is having 1M Internet and inturn it is providing
Internet/Connectivity between 4 branches using a hub-&-spoke topology
over another 1M.The client requirments are as follows1) Frame Relay is
used to acheive connectivity between branches and the main office2) Main
Branch is feeding the 4 branches with a total bandwidth of 1M3) Each
Branch will have 1M connecting it to the main branch. (Over-Booking )4)
Any branch can burst traffic up to the 1M if working alone.5) Traffic of
any branch should fall to a pre-defined value incase more than one branch
trying to access the main branch at the same time to either have Internet
or to reach another branch through the hub.  I thought about QoS and I
guess this target can be acheived using it. Haven't digged enough yet to
figure out how this could be done and thought about hearing from you
about it. Thanks for your feedback. Regards,Yasser

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