[c-nsp] Order of Operations for processing a packet (ingress and egress)

[Justin Shore]

Does anyone have any good links to an order of operations for what 
happens in what order on the assorted types of Cisco interfaces in both 
the ingress and egress directions?

I found one that touchs on the QoS order of operations:

http://www.cisco.com/en/US/tech/tk543/tk757/technologies_tech_note09186a0080160fc1.shtml

I'm interested in fairly detailed things like at what point does a 
vanilla IP packet go through the MPLS label imposition process (on 
ingress as it's received or egress onto an MPLS-enabled interface).  Or 
at what point is a packet encapsulated on a GRE interface.  I'm looking 
for a reference that talks about router ports, WAN & LAN ports on a Cat 
routing chassis like the 7600, basic LAN switchports on Cat switches, 
etc.  I've never seen a doc that put it all together and I seldom come 
across docs that even talk about small portions of the order of 
operations.  Any references would be much appreciated.

Thanks
  Justin