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Re: QoS for ADSL customers

  • From: Kim Onnel
  • Date: Thu Dec 01 08:13:44 2005
  • Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=beta;; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:references; b=NorH3TTsg+sgBFq4Oa0zBOEJdCTMMYFR7m2a0cP3GXFiJxFfIv+wXhuZnVeDmqfIRZSSvBH74W7zhn78xyG5g58VXrnmRX46TAHEy4p/VpoWgqHLNQRtNI30Wv7VeNjaYa0Ng5Q2tBUrRsDgwFwzE9VognQ4ZmbWL0VL5SHVEM0=

Our ADSL customers traffic is 3 OC3 worth of traffic, I dont think our management would buy the idea.


On 12/1/05, Ejay Hire <> wrote:

Going back to your original question, how to keep from
saturating the network with residential users using
bittorrent/edonkey et al, while suffocating business
customers.  Here goes.

Netfilter/IpTables (and a slew of commercial products I'm
sure) has a Layer 7 traffic classifier, meaning it can
identify specific file transfer applications and set a
DiffServ bit.  This means it can tell between a real http
request and a edonkey transfer, even if they are both using
http.  It also has rate-limiting capability.  So... If you
pass all of the traffic destined for your DSL customers
through an iptables box (single point of failure) then you
can classify and rate-limit the downstream rate on a
per-application basis.

Fwiw, if you are using diffserv bits, you could push the
rate-limits down to the router with a qos policy in it
instead of doing it all in the iptables box.

References on this..  The netfilter website (for
classification info) and the Linux advanced router tools
(LART) (qos info/rate limiting)


> -----Original Message-----
> From: []
> Behalf Of Kim Onnel
> Sent: Thursday, December 01, 2005 3:26 AM
> Subject: Re: QoS for ADSL customers
> Can any one please suggest to me any commercial or none
> solution to cap the download stream traffic, our upstream
> will not recieve marked traffic from us, so what can be
done ?
> On 11/29/05, Kim Onnel <> wrote:
>       Hello everyone,
>       We have Juniper ERX as BRAS for ADSL, its GigE
> interface is on an old Cisco 3508 switch with an old IOS,
> gateway to the internet is a 7609, our transit internet
> terminate on GigaE, Flexwan on the 7600
>       The links are now almost always fully utilized, we
> to do some QoS to cap our ADSL downstream, to give room
> the Corp. customers traffic to flow without pain.
>       I'm here to collect ideas, comments, advises and
> experiences for such situations.
>       Our humble approach was to collect some p2p ports
> police traffic to these ports, but the traffic wasnt much,

> one other thing is rate-limiting per ADSL customers IPs,
> that wasnt supported by management, so we thought of
> ADSL www traffic and doing exceed action is transmit, and
> police other IP traffic.
>       Doing so on the ERX wasnt a nice experience, so
> trying to do it on the cisco.
>       Thanks

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