The MPLS-OPS Archive

[sthaug@nethelp.no]

> The above conflict with the (current) definition of explicit null ie:
> "This label value is only legal at the bottom of the label stack" .
> 
> but in accordance with the (new/draft) definition which will remove the 
> restriction of
> being at the bottom of the stack . their is a draft addressing this point 
> but can not recall
> it's name .

draft-rosen-mpls-explicit-null-01.txt:

   RFC 3032 defines a reserved label value known as "IPv4 Explicit NULL"
   and a reserved label value known as "IPv6 Explicit NULL".  It states
   that these label values are only legal at the bottom of the MPLS
   label stack.  This restriction is now removed, so that those label
   values are legal anywhere in the stack.

Steinar Haug, Nethelp consulting, sthaug@nethelp.no

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