Inter-AS option naming confusion

I'm a little confused about the naming (or numbering) conventions used to
describe the various inter-AS options. I've seen them numbered, like
Option1, Option 2 and Option 3. I've seen them called Option A, B and C.
Just today I saw some that were called Option 10A, 10B, etc. And then I saw
a new one today called option AB that I had never seen before.

Can someone clarify the nomenclature here?

Also, what does Cisco call Option A (back to back VRF)? I can't find the
configuration guide in the 12.2SR configuration guide library. They only
seem to list Option B, Option C, two CSC configurations and then Option AB,
but apparently no Option A. I can only assume that they have titled it in a
way that I don't recognize.

Thanks,
John

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Received on Sun Jan 20 2013 - 18:38:28 ART