[LARTC] Wondershaper and DSCP

[LARTC] Wondershaper and DSCP

[Keith Mitchell]

Did anyone ever answer this one?  THIS is what I am trying to do:

>[LARTC] cbq+sfq and DSCP marking
>Maria Joana Urbano stmaria@dei.uc.pt
>Thu, 13 Feb 2003 19:29:42 +0000
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>Hi,
>
>I am a little confused about traffic control at egress + DSCP marking.
>
>Suppose I have a home router and set three different traffic classes at
the 
>egress interface in a similar way to what wondershaper (cbq version)
does:
>
>tc qdisc add dev $DEV root handle 1: cbq avpkt 1000 bandwidth 10mbit
>tc class add dev $DEV parent 1: classid 1:1 cbq rate ${UPLINK}kbit
allot 
>1500 prio 5 bounded isolated
>tc class add dev $DEV parent 1:1 classid 1:10 cbq rate ${UPLINK}kbit
allot 
>1600 prio 1 avpkt 1000
>tc class add dev $DEV parent 1:1 classid 1:20 cbq rate
$[9*$UPLINK/10]kbit 
>allot 1600 prio 2 avpkt 1000
>tc class add dev $DEV parent 1:1 classid 1:30 cbq rate
$[8*$UPLINK/10]kbit 
>allot 1600 prio 2 avpkt 1000
>tc qdisc add dev $DEV parent 1:10 handle 10: sfq perturb 10
>tc qdisc add dev $DEV parent 1:20 handle 20: sfq perturb 10
>tc qdisc add dev $DEV parent 1:30 handle 30: sfq perturb 10
>
>Then, I would like to DSCP mark the packets that leave the router based
on 
>their class. Ex., packets from class 1:10 would be marked with 0xb8 and

>packets from class 1:30 would have a 0x0 DSCP mark.
>
>
>However, after some reading, the only DS marking examples i found was
like 
>this (i.e., no chance to
>add cbq and sfq filters):
>
>tc qdisc add $DEV handle 1:0 root dsmark indices 64
>tc class change $DEV classid 1:10 dsmark mask 0x3 value 0xb8
>tc class change $DEV classid 1:20 dsmark mask 0x3 value 0x90
>tc class change $DEV classid 1:30 dsmark mask 0x3 value 0x0
>
>I am not sure if I understood the dsmark and DSCP marking model. It is
not 
>posible to add the DSCP marking to the cbq+sfq example above?
>
>
>Any help would be appreciate. Tnx!
>J.
>
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Re: [LARTC] Wondershaper and DSCP

[Andy Furniss]

Keith Mitchell wrote:
> Did anyone ever answer this one?  THIS is what I am trying to do:
> 
> 
>>[LARTC] cbq+sfq and DSCP marking

I haven't used dscp but it looks like you need to add cbq below dsmark 
and then filter with tcindex see

http://lartc.org/howto/lartc.adv-qdisc.dsmark.html

Andy.
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