Last Call Review of draft-ietf-pim-drlb-13

Request Review of draft-ietf-pim-drlb
Requested rev. no specific revision (document currently at 15)
Type Last Call Review
Team Ops Directorate (opsdir)
Deadline 2019-11-07
Requested 2019-10-24
Authors Yiqun Cai, Heidi Ou, Sri Vallepalli, Mankamana Mishra, Stig Venaas, Andy Green
Draft last updated 2019-10-30
Completed reviews Rtgdir Last Call review of -13 by Ben Niven-Jenkins (diff)
Genart Last Call review of -13 by Pete Resnick (diff)
Secdir Last Call review of -13 by Carl Wallace (diff)
Tsvart Last Call review of -13 by Michael Scharf (diff)
Opsdir Last Call review of -13 by Joe Clarke (diff)
Assignment Reviewer Joe Clarke 
State Completed
Review review-ietf-pim-drlb-13-opsdir-lc-clarke-2019-10-30
Posted at
Reviewed rev. 13 (document currently at 15)
Review result Ready
Review completed: 2019-10-30


I was asked to review this document on behalf of the ops directorate.  This document describes a new protocol to do PIM DR load balancing.  In general, I think this document is ready.  I appreciate both the backwards compat and operator considerations sections.  In fact, as I read through this, I kept thinking, "I hope they talk about legacy vs. new routers on the same shared LAN".  One thing that might be good to add is a callout to vendors/implementors that they are explicit in which GDR for which group/source.  Thinking with a troubleshooting mind, this changes the paradigm in forwarding and knowing how that behaves will be critical.

I also found three really small nits:

Section 5.2.1:

s/ordinal number of router X/ordinal number of Router X/


Section 5.4:



Section 5.8:

s/take part in an load-balancing/take part in load-balancing/