[AusNOG] Telstra YouTube Servers

[Matt Carter]

Hi Phil,

We have TWI & Pipe, full tables, both are path-optimal - I don't see the issues you are seeing.

Are we suggesting that you Youtube have local preffed traffic for certain prefixes to Telstra, by way of Youtube policy, or by way of Telstra sending a community to Youtube to influence their local pref. Sending a community to increase local pref above default seems highly unlikely if supported it usually goes the other way, are we super super sure we aren't seeing something that is consistent with "normal BGP path selection algorithm"? route-views.oregon-ix.net has hooks into AS1221, in lieu of an actual Telstra looking glass, everything looks ok?? (and likewise over in pipe IX land?)

( I must admit, I kind of glossed over the "not to be confused with the normal BGP path selection process" as we go on to talk about "giving preference" ... Given that local preference is a the top of the BGP decision chain, I was a little unclear as to then what you would perceive as the "normal" BGP path selection process. Just subnet/mask & AS prepend? Prefixes as viewed by the net? )

Will flick you a TWI BGP knob-turner contact off-list

Kind regards,

From: ausnog-bounces at lists.ausnog.net [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of Phillip Britt
Sent: Tuesday, 1 June 2010 1:27 PM
To: ausnog at lists.ausnog.net
Subject: [AusNOG] Telstra YouTube Servers

Hi There,

Just a short question to those who may use Telstra Wholesale Internet and Pipe Peering.  We have recently added Telstra as another transit  (in addition to Verizon) and have noticed a large drop in peering traffic coming in through Sydney, we have done some tracking and it would now appear that YouTube is now giving preference  servers based at Telstra, rather than those via Pipe Sydney.  This should not be confused with the normal BGP path selection process.

We suspect that Telstra has advised our ranges to YouTube in a similar manner to how Akamai works, and this is why they are redirecting locally.

Obviously we would prefer this traffic via Peering rather than transit.  Has anyone seen this before or had experience with dealing with Telstra to have preference for those locally based servers removed?

Cheers,
Phil Britt
Aussie Broadband

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