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VPLS/IPLS Full Mesh Failures
Assumption that full mesh of PWs is present.
If assumption fails, black holes can occur.
Failure modes:
Data plane failures that misdirect or drop packets
Loss of proper PW state at edges
Auto-discovery/configuration failures
But remember: PWs not real wires
Implemented via any-any network
Increase in error coverage is small:
Failures not caused by backhoes, router outages, but by bugs and errors.

PPT Version