Shorewall users - Jan 2006 - Stupid tcrules question

Okay, I''m dumb, mostly from my mind spinning through days of reading
Linux DiffServ at http://www.opalsoft.net/qos/DS.htm.

On to the question:

What exactly is the "MARK" in the tcrules file?  Is it using DSMARK to
set the DSCP bit of the packet, is it setting the TOS bit (which I know
is in the same *place* in the packet, but not the same *length*), or is
it setting the packet handle for the queue filter?

I ask because I''m using Netgear FMS726S switches internally, which
support DiffServ marking 0-64, with high priority starting at 32 (all
editable).  I''m assuming that I''m going to have to write a
custom
packet-shaping script using dsmark rather than relying on the shorewall
shaping to insure I''m marking the DSCP bits appropriately for my
switches?

Keith Mitchell
CTO
Productivity Associates, Inc.
5625 Ruffin Rd STE 220
San Diego, CA 92123
858-495-3528 (Direct)
858-495-3540 (Fax) 


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On Wednesday 04 January 2006 12:42, Keith Mitchell
wrote:
> Okay, I''m dumb, mostly from my mind spinning through days of
reading
> Linux DiffServ at http://www.opalsoft.net/qos/DS.htm.
>
> On to the question:
>
> What exactly is the "MARK" in the tcrules file?  Is it using
DSMARK to
> set the DSCP bit of the packet, is it setting the TOS bit (which I know
> is in the same *place* in the packet, but not the same *length*), or is
> it setting the packet handle for the queue filter?
It is setting the ''mark'' field in the SKB (socket buffer) that
represents the
packet.
>
> I ask because I''m using Netgear FMS726S switches internally, which
> support DiffServ marking 0-64, with high priority starting at 32 (all
> editable).  I''m assuming that I''m going to have to write
a custom
> packet-shaping script using dsmark rather than relying on the shorewall
> shaping to insure I''m marking the DSCP bits appropriately for my
> switches?
Yes.

-Tom
-- 
Tom Eastep    \ Nothing is foolproof to a sufficiently talented fool
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