First is: Can I prioritise my "drops" on incoming traffic when the link is overloaded. ie instead of just tail dropping, can I "prefer" to drop certain classes of traffic? If so, do I do this by setting up, say, a HTB tree like on the incoming, but the only action at the leaf is to drop?You can't set up a HTB or any classful qdiscs on incoming traffic, you can only create ingress policer filters. You can setup different filters with different priorities, to try and drop one particular type of traffic moreso than others.
If you're using a linux gateway onto your lan, then you can use a HTB qdiscs on the outgoing (lan) interface which would do a better job.
regards
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