On Sun Feb 24, 2008 at 04:32:45PM -0500, Martin Hannigan wrote:
Let's avoid speculation as to the why and reserve this thread for global restoration activity.
So, from the tit-bits I've picked up from IRC and first-hand knowledge, it would appear that 17557 leaked an announcement of 208.65.153.0/24 to 3491 (PCCW/BTN). After several calls to PCCW NOC, including from Youtube themselves, PCCW claimed to be shutting down the links to 17557. Initially I saw the announcement change from "3491 17557" to "3491 17557 17557", so I speculate that they shut down the primary link (or filtered the announcement on that link), and the prefix was still coming in over a secondary link (hence the prepend). After more prodding, that route vanished too. Various mitigations were talked about and tried, including Youtube announcing the /24 as 2*/25, but these announcements did not seem to make it out to the world at large. Currently Youtube are announcing the /24 themselves - I assume this will drop at some time once it's safe. It was noticed that all the youtube.com DNS servers were in the affected /24. Youtube have subsequently added a DNS server in another prefix. Simon -- Simon Lockhart | * Sun Server Colocation * ADSL * Domain Registration * Director | * Domain & Web Hosting * Internet Consultancy * Bogons Ltd | * http://www.bogons.net/ * Email: info@bogons.net *