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Correction of Explicit Null specification in RFC 3032

  • From: Eric Rosen <erosen@cisco.com>
  • Date: Tue, 06 Jan 2004 15:01:48 -0500
  • cc: mpls@UU.NET
  • User-Agent: EMH/1.14.1 SEMI/1.14.3 (Ushinoya) FLIM/1.14.3(Unebigoryōmae) APEL/10.3 Emacs/21.3(sparc-sun-solaris2.8) MULE/5.0 (SAKAKI)


Shahram> But how  is the  inner LSP established?  Presumably a node  (say D)
Shahram> downstream of C has distributed a label for say FEC G to C. And FEC
Shahram> G must be a subset of FEC F. 

No.  For example, FEC  F may correspond to the /32 address  of node C, or it
may correspond to a TE tunnel.  FEC  G, on the other hand, may correspond to
the address  prefix which is the  best match for the  destination address of
the packet's  IP payload.  (2547bis), or it  may correspond to  a particular
pseudowire (pwe3).  There is no "subset" relationship.