Reviewing this discussion there are three components.
1) The update of RFC5586 to allow PW to use the GAL.
2) The PW OAM application that is to use the GAL.
3) The label stack structure when teh GAL is used with a PW
This draft is only concerned with point 1 above. Points
2 and 3 need to be resolved in any PWE3 draft that describes
the use of the GAL.
To that end the text in draft-ietf-pwe3-mpls-tp-gal-in-pw-01
========
-Section 4.2
<http://tools.ietf.org/html/draft-ietf-pwe3-mpls-tp-gal-in-pw-01#section-4.2>. (GAL
Applicability and Usage) in [RFC5586 <http://tools.ietf.org/html/rfc5586>], the
original text:
In MPLS-TP, the GAL MUST be used with packets on a G-ACh on
LSPs, Concatenated Segments of LSPs, and with Sections, and
MUST NOT be used with PWs. It MUST always be at the bottom of
the label stack (i.e., S bit set to 1). However, in other MPLS
environments, this document places no restrictions on where
the GAL may appear within the label stack or its use with PWs.
is replaced by:
In MPLS-TP, the GAL MUST be used with packets on a G-ACh on
LSPs, Concatenated Segments of LSPs, and with Sections, and
MAY be used with PWs. It MUST always be at the bottom of the
label stack (i.e., S bit set to 1). However, in other MPLS
environments, this document places no restrictions on where
the GAL may appear within the label stack.
=====
should be replaced by
=====
-Section 4.2
<http://tools.ietf.org/html/draft-ietf-pwe3-mpls-tp-gal-in-pw-01#section-4.2>. (GAL
Applicability and Usage) in [RFC5586 <http://tools.ietf.org/html/rfc5586>], the
original text:
In MPLS-TP, the GAL MUST be used with packets on a G-ACh on
LSPs, Concatenated Segments of LSPs, and with Sections, and
MUST NOT be used with PWs. It MUST always be at the bottom of
the label stack (i.e., S bit set to 1). However, in other MPLS
environments, this document places no restrictions on where
the GAL may appear within the label stack or its use with PWs.
is replaced by:
In MPLS-TP, the GAL MUST be used with packets on a G-ACh on
LSPs, Concatenated Segments of LSPs, and with Sections, and
MAY be used with PWs. The presence of a GAL indicates that
an ACH immediately follows the MPLS label stack.
======
- Stewart
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