Controlling youtube traffic path ingoing to multihoming network

Posted by Hamdy Ali on Stack Overflow See other posts from Stack Overflow or by Hamdy Ali
Published on 2012-10-19T03:05:39Z Indexed on 2012/10/19 5:02 UTC
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Scenario:

I've network multihoming (dual ISP) setup.

each ISP bandwidth 500Mbps

Currently ISP-A link bandwidth almost fully utilized then the second ISP-B link

From our investigation, it is because youtube server cache response to link ISP-A.

Some time the utilization of link ISP B increased because at that time youtube server cached is response to ISP B.

My question

  1. how/Why did this happen?
  2. how do I force youtube cache server using ISP link B?

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