[e2e] Congestion control as a hot topic in IETF

Bob Braden braden at isi.edu
Wed Mar 6 09:06:11 PST 2013


It appears that we missed this one in the Host Requirements RFC 
(RFC1122).  When we update RF1122
;-)) we can include this in the link/Internet layer interface (section 
2.4). It is also related to the "advice"
suggested for dead gateway detection ( see Discussion in Section


On 3/5/2013 11:20 PM, Jon Crowcroft wrote:
> congestion control does work on some single links if the link layer
> supports a congestion feedback mechanism - switched ethernet (for
> example) has a feedback mechanism and some people have used this in
> data center modifications and used it to push the later 2 feedback
> up (as well as back) to IP/TCP - ie trigger ECN from the layer 2
> this could easily also be done with contention information in
> conventional and wireless ethernet on a single link
> and could be triggerd from a cellular base station too if
> you like
> but it isn't
> but it could be...
> given the impossibility (without precognition) of knowing who else is
> just about to send on a wireless link, and the bursty nature of human
> and software behaviour
> it seems that this would be a more useful direction to fix things in
> than other (more old fashioned and less efficient, c.f. keshav's
> message )approaches -

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