Telechat Review of draft-ietf-idr-bgp-extended-messages-33

Request Review of draft-ietf-idr-bgp-extended-messages
Requested rev. no specific revision (document currently at 36)
Type Telechat Review
Team Routing Area Directorate (rtgdir)
Deadline 2019-08-08
Requested 2019-07-17
Requested by Alvaro Retana
Authors Randy Bush, Keyur Patel, David Ward
Draft last updated 2019-07-18
Completed reviews Rtgdir Early review of -11 by Brian Weis (diff)
Genart Last Call review of -33 by Paul Kyzivat (diff)
Opsdir Last Call review of -33 by Jouni Korhonen (diff)
Secdir Last Call review of -35 by Rich Salz (diff)
Rtgdir Telechat review of -33 by Himanshu Shah (diff)
Assignment Reviewer Himanshu Shah 
State Completed
Review review-ietf-idr-bgp-extended-messages-33-rtgdir-telechat-shah-2019-07-18
Posted at
Reviewed rev. 33 (document currently at 36)
Review result Has Nits
Review completed: 2019-07-18


I have some suggestions to improve the document by adding more context to the goal of this draft. 
The document is concise, clear and easy to read.
Since this is my first review as Routing directorate, the suggestions I have,
could be out-of-scope. Will leave at the discretion of AD and authors, if suggestions are worth pursuing or not.
While Introduction section briefly mentions newer capabilities as the reason for extended
message size for the BGP, it may help the reader to expand on the advantages of extended message
as compared to current limitation of 4K BGP messages.  For me, subsequent reading of the
document as it underlines the migration, error cases and security risks, the advantages of
extended message size seems to dissipate.
I also suggest that authors address issue of extended delay at the receiver in processing of large size BGP
messages while TCP’s reliable transport is building a complete message under challenging
network conditions and compare that against smaller messages in distressed network.
In my view, making a strong case on why extended message size, would greatly add value.
 Major Issues:
No major issues found.
Minor Issues:
No minor issues found. Please note the suggestion in the comment section above.
See suggestions in comments section