Qos pre-classify

From: Győri Gábor (Gyori.Gabor@kfkizrt.hu)
Date: Fri Jun 13 2008 - 08:10:33 ART


Dear group member!

I tried to find the exact description of qos-preclassify command on CCO, but I
could not.
Here is an explanation I could extract:

If I have a main interface that:
 - has service-policy output based on L4 pclassification,
 - it is a GRE/IPSec tunnel endpoint, no native traffic is passing through,
then the serice-policy has no effect, as the outgoing packets are allready
encapsulated into tunnels, so L4 filter does not match..

Applying qos pre-classify on main interface case that the service-policy is
applied on output packets before encapsulation.

My questions:
 - Do I think right?
 - Is it possible to implement queuing on main interface this way, or only
marking will work?
 - Is DSCP copied to GRE/IPSEC tunnel header automatically with or without
using qos pre-classify?

Thanks,
Gabor



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