I have reviewed this document as part of the Operational directorate's ongoing effort to review all IETF documents being processed by the IESG.  These comments were written with the intent of improving the operational aspects of the IETF drafts. Comments that are not addressed in last call may be included in AD reviews during the IESG review.  Document editors and WG chairs should treat these comments just like any other last call comments.

This document describes a new EVPN VPWS service type specifically for multiplexing multiple attachment circuits across different Ethernet Segments and physical interfaces into a single EVPN VPWS service tunnel. This document is on the right track and ready for publication, I have a few comments and suggestions to this draft as follows:
1.As stated in [RFC8214], 12-bit and 24-bit VPWS
service instance identifiers representing normalized VIDs MUST be
right-aligned.

RFC8214 only requires 24-bit value right aligned, but doesn't provide
requirements on 12 bit value, therefore the text described here is not consistent with what it said in RFC8214

2. Section 2 said:
"
In absence of
   updating the BGP path list, the traffic for that VPWS service tunnel
   will be black-holed.
"
3. Section 5.2 said:
"
      Default FXC (Figure 1): in the default mode, a VLAN or AC failure
      is not signaled.  Consequently, in case of an AC failure such as
      VID1 on CE2, there is nothing to prevent PE3 from directing
      traffic from CE4 to PE1, leading to a potential black hole.
"
I am wondering whether this black hole issue is security issue and need to document as security consideration.

4.Section 3 said:
"
This translation of VIDs
   into unique VIDs (either single or double) is referred to as "VID
   normalization".
"
I see VID normalization as a new term, it will be nice to introduce the term defintion in section 1.1.

5.Section 3 said:
"
   When a single normalized VID is used, the lower 12 bits of the
   Ethernet tag field in EVPN routes MUST be set to that VID.  When a
   double normalized VID is used, the lower 12 bits of the Ethernet tag
   field MUST be set to the inner VID, while the higher 12 bits are set
   to the outer VID.
"
I am wondering how does disposition PE know when single normalized VID is used and when 
a double normalized VID is used, e.g., if single normalized VID is used, the higher 12 bits 
will be set to all zeros? No?

6.Section 3 said:
“
   Since the VID lookup (single or double) needs to be performed at the
   disposition PE, VID normalization MUST be completed prior to MPLS
   encapsulation on the ingress PE. 
”
One suggestion to this paragraph is to make clear who does VID normalization.
I believe it is imposition PE, the question is whether imposition PE and ingress PE are the same box?
I suggest to add two definition in the terminology section to clarify the relation between imposition PE and ingress PE,
the relation between disposition PE and egress PE.

7. Section 3.3.1 said:
"
This method of
   prioritizing locally switched traffic aligns with the baseline EVPN
   principles described in [RFC7432]
"
Can you be more specific which section in RFC7432 to introduce baseline EVPN principles?