The MPLS WG Archive

[Anouk Rocher <anouk@ureach.com>]

Eric, Arun, Ross

RFC 3031 in section 3.14 says (in the penultimate paragraph)

  "In MPLS, there is no notion of
   having a different label space for different levels of the hierarchy;
   when interpreting a label, the level of the label is irrelevant."

Does this mean that while doing label stacking, it is neccessary to
allocate labels from a single label space? Isn't this a bit too
restrictive for the cases where the inner label represents
customer traffic transiting a provider and the outer label represents
a path through the provider? 

In other ways, I think it is appropriate in some situations for labels
at different levels of the label-stack to be from different label spaces.

Comments?

Anouk

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