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Author Topic: Strange Cloudflare anycast route / poor performance  (Read 422 times)

desunet

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Strange Cloudflare anycast route / poor performance
« on: April 21, 2017, 08:00:07 PM »

For some reason, Cloudflare's anycast IPs are routing through Germany:

Code: [Select]
traceroute to cloudflare.com (2400:cb00:2048:1::c629:d7a2), 30 hops max, 80 byte packets
 1  edgeroute.desu.ne.jp (2001:470:e955:1::1)  1.334 ms  1.545 ms  1.003 ms
 2  desunet-1.tunnel.tserv14.sea1.ipv6.he.net (2001:470:a:c9c::1)  17.089 ms  12.327 ms  21.911 ms
 3  ve225.core1.sea1.he.net (2001:470:0:9b::1)  26.343 ms  26.878 ms  26.881 ms
 4  100ge10-2.core1.msp1.he.net (2001:470:0:2a0::2)  63.758 ms  64.423 ms  64.113 ms
 5  100ge13-1.core2.chi1.he.net (2001:470:0:18e::1)  62.497 ms  62.465 ms  62.848 ms
 6  100ge3-2.core1.nyc4.he.net (2001:470:0:298::2)  100.217 ms  99.758 ms  91.656 ms
 7  100ge7-2.core1.lon2.he.net (2001:470:0:2cf::1)  174.850 ms  172.179 ms  164.847 ms
 8  100ge7-1.core1.fra1.he.net (2001:470:0:37::2)  154.861 ms  153.743 ms  154.023 ms
 9  cloudflare.anc.kleyrex.net (2001:7f8:33::a101:3335:1)  149.524 ms  149.655 ms  150.100 ms
10  2400:cb00:71:1024::a29e:57d6 (2400:cb00:71:1024::a29e:57d6)  154.868 ms 2400:cb00:71:1024::a29e:5238 (2400:cb00:71:1024::a29e:5238)  155.384 ms  154.182 ms

With IPv4, I get the proper endpoint in Seattle:

Code: [Select]
traceroute to cloudflare.com (198.41.214.162), 30 hops max, 60 byte packets
 1  edgeroute.desu.ne.jp (44.26.108.1)  1.579 ms  1.535 ms  1.850 ms
 2  44-24-246-0.ip.hamwan.net (44.24.246.0)  6.902 ms  6.807 ms  6.972 ms
 3  209.189.196.65 (209.189.196.65)  7.993 ms  10.623 ms  10.618 ms
 4  ge0-0-0-1-thbr06.threshinc.net (209.189.202.199)  10.591 ms  10.586 ms  10.573 ms
 5  six.as13335.com (206.81.81.10)  10.552 ms  10.105 ms  10.075 ms
 6  198.41.214.162 (198.41.214.162)  9.771 ms  6.900 ms  7.033 ms

This results in poor bandwidth (about 2 megabits/second) and applies to every Cloudflare site I tried that had an AAAA record for its domain, such as medium.com (same traceroute through Frankfurt).

Is anyone else seeing this?
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desunet

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Re: Strange Cloudflare anycast route / poor performance
« Reply #1 on: April 23, 2017, 12:45:00 PM »

Seems to be back to normal:

Code: [Select]
traceroute to cloudflare.com (2400:cb00:2048:1::c629:d7a2), 30 hops max, 80 byte packets
 1  edgeroute.desu.ne.jp (2001:470:e955:1::1)  0.960 ms  1.191 ms  1.518 ms
 2  desunet-1.tunnel.tserv14.sea1.ipv6.he.net (2001:470:a:c9c::1)  21.799 ms  16.891 ms  12.076 ms
 3  ve225.core1.sea1.he.net (2001:470:0:9b::1)  22.891 ms  23.449 ms  23.452 ms
 4  13335.se.equinix.com (2001:504:12::1:3335:1)  23.457 ms  23.438 ms  23.408 ms
 5  2400:cb00:28:1024::a29e:6832 (2400:cb00:28:1024::a29e:6832)  23.388 ms 2400:cb00:28:1024::a29e:687a (2400:cb00:28:1024::a29e:687a)  23.363 ms 2400:cb00:28:1024::6ca2:f458 (2400:cb00:28:1024::6ca2:f458)  23.339 ms
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