How I spent last summer: Converting MAX to 2547 VPNs Converting NGIX/DC atm to gige Dan Magorian Director, Engineering and Operations magorian@maxgigapop.net

Exploring further

•We found that the main problem was gigapops who advertise unequal prefix length announcements to their ISP and Abilene. If everyone’s were equal would be fine. •But we discovered that it’s unfortunately fairly common for GPs to aggregate towards Abilene and not aggregate or aggregate less towards their ISPs, very undesirable •So when NLM saw a route and sent traffic to MAX, a more specific Qwest route not advertised to them could take precedence, and yet they hadn’t subscribed to Qwest ISP . So that traffic would be dropped.

•After some attempts to get sources to fix it we gave up.