[c-nsp] ASR 9000 Series MPLS Label Limits

[James Bensley]

Hi Lukas,

A double hit of "Friday" mental suppression, I blame it on three
maintenance windows in a row on the preceding nights :s

Obviously the label count can only go to 2^20-($reserved_labels) so should
have guessed it wasn't sharing TCAM space with prefix space, secondly I
have that slide deck already!

Double face palm.

Cheers,
James.