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Approach Talking Points "80% easier to understand, 90% less time", VERY SIMPLE upper layer models … Applies if you have thousands/ten thousands of NEs and small … Not a monolithic model ... No device class/service xsds etc. without meta models … Leave 100% to all-inclusive models … Process is crucial ... .net example ... Fostering exposure of methods in NEs … One draft rules them all does not work here … Many folks not used to meta modeling … Overspecify ... Good expressiveness necessary ... Good but not perfect coverage, completeness, correctness … Iterate … Not going to solve the world … but 80% of it ;) Human readable schemata and models a key criterion Models will do some things like IP very well … Use of 2-3 sample stacks: e.g. ATM stack or Site-to-Site IPSec Tunnels/POS/MPLS/SONET-SDH … Sensible abstraction, decomposition where necessary … integration-produce something that fits together … importance of meta models/frameworks ... |