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Author Topic: Congestion between HE and Cloudflare in Seattle?  (Read 1076 times)


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Congestion between HE and Cloudflare in Seattle?
« on: June 10, 2020, 03:25:02 PM »

Lately (past couple weeks perhaps) I've been seeing pretty poor performance to Cloudflare-hosted sites through the tunnel at the Seattle POP. Traceroute output:

traceroute to (2606:4700::6811:b055), 30 hops max, 80 byte packets
 1 (2001:470:e955:1::1)  0.286 ms  0.267 ms  0.261 ms
 2 (2001:470:a:c9c::1)  15.072 ms  15.976 ms  16.921 ms
 3 (2001:470:0:9b::1)  17.837 ms  18.076 ms  18.033 ms
 4  * (2606:a980:0:4::7)  102.445 ms (2001:504:16::3417)  102.401 ms
 5  * * 2400:cb00:28:1024::6ca2:f45f (2400:cb00:28:1024::6ca2:f45f)  102.677 ms

For now I've been rejecting connections to Cloudflare's IPv6 ranges thru my firewall so Happy Eyeballs kicks in to force IPv4. In terms of bandwidth, I'm getting about 8 mbps on via IPv6, and the expected 300 mbps via IPv4. Other IPv6 destinations seem unaffected; it's only Cloudflare that seems to be slow.

Maybe the peering session between HE and Cloudflare at SIX is congested?