Google public dns is anycast so trying to hit from a different location will most likely result in a different destination. https://developers.google.com/speed/public-dns/faq Matt Blackstone Network Engineer On Mon, Aug 29, 2016 at 1:54 PM, Damian Menscher via Outages < outages@outages.org> wrote:
This appears to be a problem on the Level3 network in the DFW region, which is why only some of you see it. (Those who don't see it are in other regions, peering with Google directly, or using other transit providers.)
For those seeing issues, I suggest escalating to Level3, perhaps after trying a reverse-traceroute from http://lg.level3.net/ (I can't do this test since you didn't specify your source IP.)
Damian
On Mon, Aug 29, 2016 at 11:14 AM, Dan White <dwhite@olp.net> wrote:
We are seeing packet loss to google hosts, hosted in Dallas. Any anyone seeing this?
MTR output:
Host Loss% Snt Last Avg Best Wrst StDev 1. 10.0.2.1 0.0% 51 2.4 1.9 0.5 5.2 0.7 2. olp-67-217-152-5.olp.net 0.0% 51 0.4 3.7 0.3 27.8 4.9 3. olp-67-217-158-29.olp.net 0.0% 50 0.3 4.5 0.3 22.0 5.3 4. olp-67-217-151-125.olp.net 0.0% 50 0.6 4.9 0.6 33.3 6.8 5. olp-67-217-158-30.olp.net 0.0% 50 0.6 6.4 0.5 64.0 10.5 6. olp-67-217-158-21.olp.net 0.0% 50 11.4 4.4 1.1 13.6 4.1 7. xe-8-3-0.bar2.tulsa2.level3.net 0.0% 50 1.2 2.7 1.2 27.5 5.5 8. ae-0-11.bar1.tulsa2.level3.net 0.0% 50 2.0 4.1 1.9 44.5 7.8 9. ae-3-3.ebr4.dallas1.level3.net 91.8% 50 20.5 20.5 20.5 20.5 0.0 10. ae-8-0.ear3.dallas1.level3.net 93.9% 50 20.6 20.6 20.6 20.7 0.0 11. google-level3-100g.dallas1.leve28.0% 50 20.5 20.7 20.4 29.6 1.5 12. 108.170.240.193 22.0% 50 20.8 20.7 20.7 20.9 0.0 13. 64.233.175.9 26.0% 50 20.7 20.7 20.7 20.8 0.0 14. google-public-dns-a.google.com 24.0% 50 20.5 20.6 20.5 25.9 0.9
The problematic hop appears to be either 10 or 11 (level3-100g). Compare to:
Host Loss% Snt Last Avg Best Wrst StDev 1. 10.0.2.1 0.0% 124 0.8 1.6 0.5 4.6 0.5 2. olp-67-217-152-5.olp.net 0.0% 124 3.8 4.3 0.3 29.9 5.6 3. olp-67-217-158-29.olp.net 0.0% 124 0.3 3.5 0.3 26.1 4.9 4. olp-67-217-151-125.olp.net 0.0% 124 6.6 3.3 0.6 20.0 3.7 5. olp-67-217-158-30.olp.net 0.0% 124 0.6 7.1 0.6 44.1 9.8 6. olp-67-217-158-21.olp.net 0.8% 124 11.9 4.8 1.1 14.9 4.3 7. xe-8-3-0.bar2.tulsa2.level3.net 0.0% 123 1.3 4.0 1.1 68.3 11.3 8. ae-0-11.bar1.tulsa2.level3.net 0.8% 123 2.1 3.9 1.9 62.3 8.1 9. ae-3-3.ebr4.dallas1.level3.net 94.3% 123 20.5 20.6 20.5 20.6 0.0 10. ae-2-3512.edge2.dallas1.level3. 0.0% 123 20.4 22.1 20.3 68.0 7.1 11. b.resolvers.level3.net 0.0% 123 20.2 20.3 20.2 22.8 0.3
-- Dan White BTC Broadband Network Admin Lead Ph 918.366.0248 (direct) main: (918)366-8000 Fax 918.366.6610 email: dwhite@olp.net http://www.btcbroadband.com
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