[LARTC] Linux policing

[LARTC] Linux policing

[Leonardo Balliache]

At 09:14 a.m. 20/06/03 +0100, you wrote:

Hi Andrew,

I'm not sure if I understand what your answer is. Policing is done at 
ingress. If you are talking about the process of setting the DSCP it is 
done at egress using DSMARK. I don´t know (talk with Patrick or Stef) if by 
using IMQ (as I understand it is some kind of virtual interface, not sure, 
either) you could install a DSMARK on this interface to mark packets when 
entering the router. Really don´t know. Again I´m not sure if I am 
understanding the sense of your answer.

If you are not hurry do not hesitate to contact me again, but I'm always 
late with my e-mail replies.

Best regards,

Leonardo Balliache


>cheers.
>Having had another look at the kernel, and at the lartc howto it seems that
>tc filter when policing may be able to reclassify out of profile traffic to
>BE, but no more than this, without first putting traffic into a queue.
>
>Andrew
>
>-----Original Message-----
>From: Leonardo Balliache [mailto:leoball@opalsoft.net]
>Sent: Wednesday, June 18, 2003 7:39 PM
>To: Andrew.Burnside@thalesgroup.com
>Cc: lartc@mailman.ds9a.nl
>Subject: Re: LARTC digest, Vol 1 #1233 - 16 msgs
>
>
>Andrew:
>
>Differentiated Service on Linux HOWTO (work in progress) could be of some
>help for you.
>
>Have a look at http://opalsoft.net/qos
>
>Best regards,
>
>Leonardo Balliache
>
> >Message: 6
> >From: "Burnside, Andrew" <Andrew.Burnside@thalesgroup.com>
> >To: "'lartc@mailman.ds9a.nl'" <lartc@mailman.ds9a.nl>
> >Date: Wed, 18 Jun 2003 13:24:44 +0100
> >Subject: [LARTC] DiffServ Marking
> >
> >I am trying to compare the behaviour of the Linux DiffServ implementation
> >with that of Cisco, in DSCP remarking for traffic policing.
> >As I understand it, the DSCP is marked at the egress interface (parent
> >queue), based on the class that packets are in.
> >
> >I am looking at what happens at an inter-AS boundary.
> >DSCP marked traffic coming into the Edge Router need to be policed and
> >remarked:
> >e.g. EF traffic up to 2Mbps marked as EF
> >EF traffic beyond 2Mbps should be policed and remarked as BE.
> >Is there a way to do this remarking before the traffic is segregated into
> >egress queues?
> >
> >Cheers
> >
> >Andrew



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