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Will this drop packets or queue them?
It will queue them, but if queue fills, then it will drop.
what does the fair-queue do?
Splits flows, within that class, into different sub-queues. Ideally each flow will have its own sub-queue, but its possible multiple flows will map to the same sub-queue. For whatever bandwidth the class gets, each class sub-queue will receive an equal share (NB: CBWFQ pre-HQF actually used WFQ and was only supported in class-default.)
If I had another access-list defined, say 101, would i just add it toclass-map DR-Replication
match access-group 106
match access-group 101
and the same policy would take affect?
It depends on the contents for the ACLs and whether the class-map uses a match-any (logical or) or a match-all (logical and) for its match entries.
