Subject: Re: [tsvwg] I-D Action: draft-ietf-tsvwg-circuit-breaker-00.txt

From: Colin Perkins <[email-masked]>
Date: Thu, 26 Mar 2015 17:27:17 -0500

On 27 Sep 2014, at 06:04, [email-masked] wrote:
> A New Internet-Draft is available from the on-line Internet-Drafts directories.
> This draft is a work item of the Transport Area Working Group Working Group of the IETF.
> 
>        Title           : Network Transport Circuit Breakers
>        Author          : Godred Fairhurst
> 	Filename        : draft-ietf-tsvwg-circuit-breaker-00.txt
> 	Pages           : 13
> 	Date            : 2014-09-27
> 
> Abstract:
>   This note explains what is meant by the term "network transport
>   circuit breaker" (CB).  It describes the need for circuit breakers
>   when using network tunnels, and other non-congestion controlled
>   applications.  It also defines requirements for building a circuit
>   breaker and the expected outcomes of using a circuit breaker within
>   the Internet.
> 
> 
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-tsvwg-circuit-breaker/

To follow-up from my comments at the mic in Dallas, I think this draft is important, and support its publication. 

Looking at the content, it may be worth highlighting in the Introduction that requirements for circuit breakers are given in the draft. It might also be worth renaming Section 3 to something like "Requirements for a Network Transport Circuit Breaker" to more clearly highlight that this is the location of the normative content. It seems a little hidden currently.

Security considerations are missing. We mention a couple of attacks on the RTP circuit breaker in draft-ietf-avtcore-rtp-circuit-breakers that are possible if the circuit breaker operates on non-authenticated feedback. These could also affect other types of circuit breaker, and so should perhaps be highlighted here. 

Cheers,
Colin

-- 
Colin Perkins
https://csperkins.org/