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Cell Relay Retreat>MPLS WG Archive>month:2003-Jan> msg00153



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Vpns vs explicit null label

  • From: Eric Rosen <erosen@cisco.com>
  • Date: Wed, 29 Jan 2003 10:51:07 -0500
  • cc: francis.arts@alcatel.be, mpls@UU.NET
  • User-Agent: EMH/1.14.1 SEMI/1.14.3 (Ushinoya) FLIM/1.14.3(Unebigoryōmae) APEL/10.3 Emacs/21.2(sparc-sun-solaris2.8) MULE/5.0 (SAKAKI)


Probably an explicit null which is not at the bottom of the stack should not
be interpreted as indicating the protocol type of the payload. 

> others may have  hard-coded the condition in which  an explicit NULL label
> is not bottom of stack as an error

Yes, but that would be an example  of why "be liberal in what you accept" is
a good principle.