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

[dui]

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.

[fritex]

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

@dui

assume

Probably due to the local ISP / peering …

Peering - Why don't I reach the closest datacenter to me?

Why don’t I reach the closest datacenter to me? Cloudflare is an anycast network, so where you are routed is determined by peering with ISPs. The shortest path geographically isn’t always possible due to peering agreements. If you request a site hosted on Cloudflare from home: The domain resolves to a Cloudflare IP Your browser sends an HTTP request to that IP Your ISP’s routers consult their routing table and route the packets upstream to their transit provider ( COSTS MONEY ) The packets …

[dui]

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.

[dui]

(post embedded in first post)