ECN big picture please

Hello,

Can somone explain how ECN works. Assume following scenario:

Host1------f0/0)R1(f0/1)------(f0/1)R2(f0/0)------(f0/0)R3(f0/1)-----Host2

Host1 sends data to Host2. This data is cought by a following policy on R2:

policy-map PA
 class CA
  bandwidth percent 10
  random-detect
  random-detect ecn

int f0/1
service-policy out PA

I believe that interesting traffic is maked with ECN bits 11. But what
happens next, how host1 is notified to slow down ? And how hosts 1 will know
that it has to slow down if it is a refular http server ?

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Received on Sun Jan 02 2011 - 10:48:39 ART