> I know RD keeps 10.0.0./8 of customer A separate from 10.0.0./8 of customer
> B.

And this is good understanding. Now, for the final bit - that's the
ONLY thing it does!

> But if the final import export is done on the basis of RT, where RD is
> actually being compared ?

Nowhere. The only purpose of RD is to keep prefixes "unique", i.e.
allow overlapping IPv4 address space by prepending them with RD.

--
Marko Milivojevic - CCIE #18427
Senior Technical Instructor - IPexpert

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