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@xxxxxxxxxxxx] Sent: Wednesday, June 18, 2003 7:39 PM To: Andrew.Burnside@xxxxxxxxxxxxxxx Cc: lartc@xxxxxxxxxxxxxxx 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@xxxxxxxxxxxxxxx> >To: "'lartc@xxxxxxxxxxxxxxx'" <lartc@xxxxxxxxxxxxxxx> >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
