CPH is routing traffic for AS6507 Riot Games, Inc. through Stockholm

WARP+ Copenhagen is routing requests to AS6507 Riot Games, Inc in Amsterdam through Stockholm instead of Amsterdam/Hamburg causing 20 ms higher latency (for 1000 km/650 miles extra).

The AS6507 data centre in question is Amsterdam while their geographically closest IX’s are in Hamburg and Amsterdam.

PS C:\Users\Mikael> tracert ae2.er01.ams01.riotdirect.net

Tracing route to ae2.er01.ams01.riotdirect.net [104.160.159.180]
over a maximum of 30 hops:

  1    21 ms    18 ms    14 ms  172.16.0.1
  2    26 ms    19 ms    20 ms  162.158.133.1
  3    22 ms    19 ms    27 ms  kbn-b3-link.ip.twelve99.net [62.115.46.150]
  4    32 ms    35 ms    30 ms  kbn-bb1-link.ip.twelve99.net [62.115.143.6]
  5    41 ms    44 ms    28 ms  s-bb1-link.ip.twelve99.net [62.115.134.79]
  6    43 ms    33 ms    28 ms  s-b5-link.ip.twelve99.net [62.115.119.109]
  7    39 ms    25 ms    29 ms  riotgames-svc068396-ic352718.ip.twelve99-cust.net [62.115.186.51]
  8    27 ms    26 ms    33 ms  ae1.er02.sto01.riotdirect.net [104.160.143.191]
  9    46 ms    51 ms    38 ms  ae3.er01.ams02.riotdirect.net [104.160.143.98]
 10    40 ms    44 ms    41 ms  ae2.er01.ams01.riotdirect.net [104.160.159.180]

Trace complete.

For reference, doing the traceroute to AS6507 (ae2.er01.ams01.riotdirect.net) from Hurricane Electric in Copenhagen does send the traffic through Hamburg, so something seems to be up with CPH/twelve99.


I assume that this also applies to other traffic (like Workers sub-requests) hitting CPH and calling services at AS6507, as well as Riot Games, Inc.'s own services running on Cloudflare?


I wasn’t able to open a ticket in the dash about this route, as suggested in another post.

Thank you for notice.

From Cloudflare Status page → https://www.cloudflarestatus.com/, CPH seems to be working fine, no incident(s) and no issue(s) as for now :thinking:

Probably due to the local ISP / peering …

There could very well be some announcement/routing issues over at twelve99, but sending AS6507 traffic through them doesn’t seem very optimal, simply a misconfiguration or hot potato.

Doing a traceroute to another AS6507 data centre, in Frankfurt this time, from CPH:

PS C:\Users\Mikael> tracert ae3.er01.fra02.riotdirect.net

Tracing route to ae3.er01.fra02.riotdirect.net [104.160.151.198]
over a maximum of 30 hops:

  1    21 ms    18 ms    22 ms  172.16.0.1
  2    19 ms    28 ms    19 ms  162.158.133.1
  3    19 ms    26 ms    18 ms  kbn-b3-link.ip.twelve99.net [62.115.46.150]
  4   191 ms   163 ms   185 ms  kbn-bb2-link.ip.twelve99.net [62.115.138.112]
  5    31 ms    26 ms    26 ms  s-bb2-link.ip.twelve99.net [62.115.139.172]
  6    27 ms    25 ms    25 ms  s-b5-link.ip.twelve99.net [80.91.253.227]
  7    33 ms    32 ms    27 ms  riotgames-svc068396-ic352718.ip.twelve99-cust.net [62.115.186.51]
  8    39 ms    38 ms    39 ms  ae3.er01.fra02.riotdirect.net [104.160.151.198]

Trace complete.

(post embedded in first post)