Hello,



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 primarily for the benefit of the operational area directors.


Document editors and WG chairs should treat these comments just like 


any other



last call comments.



Reviewed Draft:  draft-ietf-softwire-map-t-06 for its operational 


impact. Intended status: Experimental




Review Status: Ready with text nits



Summary: This is a document which outlines the MAP-T (Mapping of 


Address and Port) stateless IPv6-IPv4 NAT64 based solution.




Text Input:

Section 7.1

Paragraph 2:
old text “.. a CE requires an the IPv6 prefix to be assigned to the CE”
new text “.. a CE requires an IPv6 prefix to be assigned to the CE.”

Section 7.2

Paragraph 3:


old text “.. no specific routes need to be  advertised externally for 


MAP to operate, neither in IPv6 nor IPv4 BGP.”


new text “.. no specific IPv6 or IPv4 routes need to be advertised 


externally outside the service provider’s network for MAP to operate.”






I added this version of the sentence since it makes more sense to me.  


Also, you technically don’t need BGP on the ISP side (although I can’t 


a modern network which does not use it).





Ops Related Comments and review



This document is well thought out and has addressed the major items I 


would be looking at from an operational standpoint.  Areas of focus 


for these types of technologies include ICMP handling (addressed in 


section 9), DoS and Spoofing attacks (addressed in section 14) and 


overall deployment guidance (provided throughout the document).






The only item I did not see mentioned specifically was QoS.  This is 


not a major issue given the Experimental status of the draft, and is 


likely easily addressed (perhaps there was discussion on this that I 


missed).  Given the prevalence of video services in operator networks 


today, video propagation leveraging QoS may to be supported for end 


sites (in this case the MAP-T CE side).






Regards,

Victor K