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X-Original-To: nanog@nanog.org From: Nolan Berry <nolan.berry@RACKSPACE.COM> To: Brielle Bruns <bruns@2mbit.com> Date: Sat, 28 Jan 2017 00:34:52 +0000 In-Reply-To: <69e0bbe3-a21d-2051-c96e-172505a25f04@2mbit.com> Cc: NANOG list <nanog@nanog.org> Errors-To: nanog-bounces@nanog.org There is a thread going on the outages mailing list talking about this issu= e. Seems to be no failures but increased latency to ns1.yahoo.com and ns3.= yahoo.com with trace routes showing USA traffic hitting Asia on v6. Nolan > On Jan 27, 2017, at 6:30 PM, Brielle Bruns <bruns@2mbit.com> wrote: >=20 > Hello! >=20 > Don't suppose there's a Yahoo admin in the DNS department that can invest= igate/debug a Geolocation issue? >=20 > It appears that Yahoo's Geolocation is putting CenturyLink's IPv6 address= es as being in .BR, causing not only the two CL/Qwest recursive servers (20= 5.171.2.65/205.171.3.65/2001:428::1/2001:428::2), but recusive servers host= ed on biz customer IPv6 6RD ranges to return non-US Yahoo servers (and be a= gonizingly slow). >=20 > =3D=3D=3D=3D=3D > View from local powerdns recursor, dual stacked, but preferring ipv6 for = resolving: >=20 > root@noc:~# dig mg.mail.yahoo.com @127.0.0.2 >=20 > ; <<>> DiG 9.9.5-9+deb8u9-Debian <<>> mg.mail.yahoo.com @127.0.0.2 > ;; global options: +cmd > ;; Got answer: > ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 50638 > ;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 0 >=20 > ;; QUESTION SECTION: > ;mg.mail.yahoo.com. IN A >=20 > ;; ANSWER SECTION: > mg.mail.yahoo.com. 1349 IN CNAME fd-geoycpi-uno.gycpi.b.yahoo= dns.net. > fd-geoycpi-uno.gycpi.b.yahoodns.net. 300 IN A 200.152.162.161 > fd-geoycpi-uno.gycpi.b.yahoodns.net. 300 IN A 200.152.162.135 >=20 > ;; Query time: 240 msec > ;; SERVER: 127.0.0.2#53(127.0.0.2) > ;; WHEN: Fri Jan 27 17:20:52 MST 2017 > ;; MSG SIZE rcvd: 116 >=20 > =3D=3D=3D=3D=3D > View from CL/Qwest IPv4 (likely dual stacked) and IPv6 recursors: >=20 > root@noc:~# dig mg.mail.yahoo.com @205.171.2.65 >=20 > ; <<>> DiG 9.9.5-9+deb8u9-Debian <<>> mg.mail.yahoo.com @205.171.2.65 > ;; global options: +cmd > ;; Got answer: > ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 8308 > ;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1 >=20 > ;; OPT PSEUDOSECTION: > ; EDNS: version: 0, flags:; udp: 4096 > ;; QUESTION SECTION: > ;mg.mail.yahoo.com. IN A >=20 > ;; ANSWER SECTION: > mg.mail.yahoo.com. 758 IN CNAME fd-geoycpi-uno.gycpi.b.yahood= ns.net. > fd-geoycpi-uno.gycpi.b.yahoodns.net. 138 IN A 200.152.162.161 > fd-geoycpi-uno.gycpi.b.yahoodns.net. 138 IN A 200.152.162.135 >=20 > ;; Query time: 17 msec > ;; SERVER: 205.171.2.65#53(205.171.2.65) > ;; WHEN: Fri Jan 27 17:21:35 MST 2017 > ;; MSG SIZE rcvd: 127 >=20 >=20 > root@noc:~# dig mg.mail.yahoo.com @2001:428::1 >=20 > ; <<>> DiG 9.9.5-9+deb8u9-Debian <<>> mg.mail.yahoo.com @2001:428::1 > ;; global options: +cmd > ;; Got answer: > ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 24138 > ;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1 >=20 > ;; OPT PSEUDOSECTION: > ; EDNS: version: 0, flags:; udp: 4096 > ;; QUESTION SECTION: > ;mg.mail.yahoo.com. IN A >=20 > ;; ANSWER SECTION: > mg.mail.yahoo.com. 464 IN CNAME fd-geoycpi-uno.gycpi.b.yahood= ns.net. > fd-geoycpi-uno.gycpi.b.yahoodns.net. 214 IN A 200.152.162.161 > fd-geoycpi-uno.gycpi.b.yahoodns.net. 214 IN A 200.152.162.135 >=20 > ;; Query time: 46 msec > ;; SERVER: 2001:428::1#53(2001:428::1) > ;; WHEN: Fri Jan 27 17:23:38 MST 2017 > ;; MSG SIZE rcvd: 127 >=20 > =3D=3D=3D=3D=3D > Google recursor for reference: >=20 > root@noc:~# dig mg.mail.yahoo.com @8.8.8.8 >=20 > ; <<>> DiG 9.9.5-9+deb8u9-Debian <<>> mg.mail.yahoo.com @8.8.8.8 > ;; global options: +cmd > ;; Got answer: > ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 13327 > ;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 1 >=20 > ;; OPT PSEUDOSECTION: > ; EDNS: version: 0, flags:; udp: 512 > ;; QUESTION SECTION: > ;mg.mail.yahoo.com. IN A >=20 > ;; ANSWER SECTION: > mg.mail.yahoo.com. 1459 IN CNAME fd-geoycpi-uno.gycpi.b.yahoo= dns.net. > fd-geoycpi-uno.gycpi.b.yahoodns.net. 184 IN A 216.115.100.124 > fd-geoycpi-uno.gycpi.b.yahoodns.net. 184 IN A 208.71.44.31 > fd-geoycpi-uno.gycpi.b.yahoodns.net. 184 IN A 216.115.100.123 > fd-geoycpi-uno.gycpi.b.yahoodns.net. 184 IN A 208.71.44.30 >=20 > ;; Query time: 27 msec > ;; SERVER: 8.8.8.8#53(8.8.8.8) > ;; WHEN: Fri Jan 27 17:21:59 MST 2017 > ;; MSG SIZE rcvd: 159 >=20 >=20 >=20 > For reference, CL/Qwest's IPv6 range for 6RD is 2602::/24. >=20 > This appears to be impacting Yahoo, Yahoo Mail, Flickr, etc (aka Yahoo ow= ned properties). >=20 >=20 > Thanks! >=20 > --=20 > Brielle Bruns > The Summit Open Source Development Group > http://www.sosdg.org / http://www.ahbl.org
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