Are they replying with that subnet via dns when requests are being made?
Luke Guillory Network Operations Manager Tel: 985.536.1212 Fax: 985.536.0300 Email: lguill...@reservetele.com Reserve Telecommunications 100 RTC Dr Reserve, LA 70084 _________________________________________________________________________________________________ Disclaimer: The information transmitted, including attachments, is intended only for the person(s) or entity to which it is addressed and may contain confidential and/or privileged material which should not disseminate, distribute or be copied. Please notify Luke Guillory immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. E-mail transmission cannot be guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. Luke Guillory therefore does not accept liability for any errors or omissions in the contents of this message, which arise as a result of e-mail transmission. . -----Original Message----- From: NANOG [mailto:nanog-boun...@nanog.org] On Behalf Of Jürgen Jaritsch Sent: Tuesday, March 21, 2017 2:24 PM To: nanog@nanog.org Subject: Re: Facebook more specific via Level3 ? Hi, > This specific, and many others, are only announced to peers in the > metro they originate in. To receive this prefix directly you'll need > to peer with us in Los Angeles. the point is: Level3 is exporting this prefix to the EU since ~1 week … Telia is learning it from Level3 and they also started to re-export it: Telia Looking Glass (http://lg.telia.net/?query=bgp&protocol=IPv4&addr=31.13.71.0/24+exact&route r=Vienna) Command: show route protocol bgp 31.13.71.36 table inet.0 31.13.71.0/24 *[BGP/170] 18w5d 16:40:16, MED 0, localpref 150 AS path: 3356 32934 I, validation-state: unverified > to 80.239.128.178 via ae9.0 This is causing >120ms latency to Austrian (and some German ...) networks towards Facebook - current traceroute from source network 188.172.239.0/24: Packets Pings Host Loss% Snt Last Avg Best Wrst StDev 1. router 0.0% 4 0.5 0.5 0.5 0.6 0.0 2. 192.168.8.3 0.0% 4 0.6 0.7 0.6 0.8 0.1 3. 37.252.236.88 0.0% 4 37.3 34.2 30.6 37.3 2.9 4. er-03.00-09-23.anx04.vie.at.anexia-it.com 0.0% 4 21.1 31.9 21.1 50.9 13.3 5. cr-02.0v-08-72.anx03.vie.at.anexia-it.com 0.0% 4 23.2 25.9 20.4 31.6 5.1 6. win-b4-link.telia.net 0.0% 4 22.1 25.0 22.1 30.1 3.5 7. level-ic-1573273-wien-b4.c.telia.net 0.0% 3 22.4 22.3 21.1 23.3 1.1 8. ae-3-3611.edge2.dallas1.level3.net 0.0% 3 150.5 150.6 150.4 150.8 0.2 9. facebook-in.edge2.dallas1.level3.net 0.0% 3 156.6 152.9 151.0 156.6 3.2 10. po102.psw02.dft4.tfbnw.net 0.0% 3 151.4 151.6 151.4 152.0 0.4 11. 173.252.67.57 0.0% 3 151.6 152.3 151.6 153.4 0.9 12. edge-star-mini-shv-01-dft4.facebook.com 0.0% 3 159.3 158.4 152.5 163.6 5.6 The admins of AS42473 started to drop the more specific from Level3 and now they get it from Telia (which is the Level3 re-export they learned). I guess you guys should talk to Level3 and ask them what the hell they are doing? :). Thanks & best regards Jürgen
