Last Call Review of draft-ietf-opsawg-capwap-alt-tunnel-08
review-ietf-opsawg-capwap-alt-tunnel-08-opsdir-lc-liu-2016-11-03-00

Hi all,



(Sorry for being late due to travelling. )

I have reviewed draft-ietf-opsawg-capwap-alt-tunnel-08 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.



“Control and Provisioning of Wireless Access Points (CAPWAP) defines a

  specification to encapsulate a station's data frames between the

   Wireless Transmission Point (WTP) and Access Controller (AC).

   Specifically, the station's IEEE 802.11 data frames can be either

   locally bridged or tunneled to the AC.  When tunneled, a CAPWAP data

   channel is used for tunneling.  In many deployments encapsulating

   data frames to an entity other than the AC (for example to an Access

   Router (AR)) is desirable.  Furthermore, it may also be desirable to

   use different tunnel encapsulation modes between the WTP and the

   Access Router.  This document defines extension to CAPWAP protocol

   for supporting this capability and refers to it as alternate tunnel

   encapsulation.  The alternate tunnel encapsulation allows 1) the WTP

   to tunnel non-management data frames to an endpoint different from

   the AC and 2) the WTP to tunnel using one of many known encapsulation

   types such as IP-IP, IP-GRE, CAPWAP.  The WTP may advertise support

   for alternate tunnel encapsulation during the discovery or join

   process and AC may select one of the supported alternate tunnel

   encapsulation types while configuring the WTP.”



I have also discussed with some of co-authors about some details of this draft.
Some affiliations may need to be updated.

J



My overall view of the document is 'Ready' for publication.





*  Section 3.5, page 15:

PMIPv6 is updated by RFC6543 and RFC7864. Authors may need to double check
whether corresponding updates needed.



Regards,

Will (Shucheng LIU)