Early Review of draft-ietf-lsvr-applicability-09
review-ietf-lsvr-applicability-09-rtgdir-early-venaas-2023-04-14-00

Request Review of draft-ietf-lsvr-applicability
Requested revision No specific revision (document currently at 11)
Type Early Review
Team Routing Area Directorate (rtgdir)
Deadline 2023-04-13
Requested 2023-03-27
Requested by Gunter Van de Velde
Authors Keyur Patel , Acee Lindem , Shawn Zandi , Gaurav Dawra
I-D last updated 2023-04-14
Completed reviews Opsdir Early review of -09 by Ron Bonica (diff)
Rtgdir Early review of -09 by Stig Venaas (diff)
Comments 
Document is being prepared for WGLC. Early review requested to prep the WGLC request
Assignment Reviewer Stig Venaas
State Completed
Request Early review on draft-ietf-lsvr-applicability by Routing Area Directorate Assigned
Posted at https://mailarchive.ietf.org/arch/msg/rtg-dir/h6jRijyOK52HyC3rJgdKYQD54TU
Reviewed revision 09 (document currently at 11)
Result Ready
Completed 2023-04-14
review-ietf-lsvr-applicability-09-rtgdir-early-venaas-2023-04-14-00
The draft is in good shape. It is easy to read. There is one technical point I
want to raise, but not sure if anything needs to change. There are a couple of
minor grammatical issues.

In section 4 it says

   Within a Data Center, servers are commonly interconnected the CLOS
   topology [CLOS].  The CLOS topology is fully non-blocking and the
   topology is realized using Equal Cost Multi-Path (ECMP).  In a CLOS
   topology, the minimum number of parallel paths between two servers is
   determined by the width of a tier-1 stage as shown in the figure 1.

Regarding number of parallel paths, isn't the the width of tier-2 a factor as
well?

I found two grammar issues. One is in this first sentence. A word or two need
to be added to make it a complete sentence.

In section 5 it says:

   In order to simplify layer-3 routing and operations [RFC7938], many
   data centers use BGP as a routing protocol to create both an underlay
   and overlay network for their CLOS Topologies.

"an" should be added in the last sentence so that it says "both an underlay and
an overlay".