[c-nsp] Remote LFA on IOS XR -does it require Explicit Null MPLS Labels?

[Oliver Boehmer (oboehmer)]

>Hi Folks,
>
>Is anybody running Remote LFA on IOS XR please?
>Does it require explicit null labels to be enabled network wide please?

generally yes, reason is that some platforms/versions (don't have the
details ready just now) can't rLFA-protect a primary path which has no
label (due to imp-null).

	oli