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Why RBridge Extensions?
Proof by Assumption:
It is intuitively obvious that protocols need an extension facility…
Proof by Tradition:
All IETF Protocols have extensions…
Proof by Aesthetics:
Extensible protocols are beautiful, nonextensible ones are ugly…
Proof by Intimidation:
Any fool can see that protocols need an extension mechanism…

To support following possible extensions to RBridge:
LIDs (Local IDs) if there isn’t consensus to put them into the fixed shim
Security, such as Rbridge end to end authentication
The most interesting extensions: those we haven’t thought of yet
PPT Version