Help me understand the routing

Hi,
I am fromHungary, from the network of Hungarian Telekom. CloudFlare has servers in the DC of Hungarian Telekom. Hungary has a BiX (Budapest Interntet Exchange) where all Hungarian providers has cable. CloudFlare has peering with BiX.

But if I trace a Cloudflare hosted website, I see this:

Tracing route to [172.67.72.108]
over a maximum of 30 hops:

  1     8 ms     8 ms     7 ms  192.168.0.1
  2    15 ms    14 ms    14 ms  10.228.32.1
  3    16 ms    15 ms    16 ms  145.236.79.28
  4    19 ms    17 ms    17 ms  Te0-0-0-0.er0-dunabogdany.net.telekom.hu [84.1.66.189]
  5    17 ms    19 ms    17 ms  81.183.3.38
  6    17 ms    16 ms    18 ms  81.183.3.51
  7    23 ms    21 ms    23 ms  80.150.169.205
  8    24 ms    24 ms    24 ms  62.159.61.127
  9    26 ms    25 ms    25 ms  ae-1-3103.edge1.Budapest1.Level3.net [4.69.143.118]
 10    84 ms    78 ms    76 ms  212.187.202.54
 11    77 ms    78 ms    83 ms  172.67.72.108

Trace complete.

Why does it routed through Germany back to Hungary?

This is a little outside of my wheelhouse, but maybe they’re only peering over these routes?

http://lg.bix.bg/?query=bgp&addr=neighbors+193.169.198.68+routes&router=rs1.bix.bg+(IPv4)

image

Not sure if that’s the correct way to inspect the routing.

  1. Maybe Hungary cloudflare servers is only available to paid plans (maybe enterprise), try tracerouting to discord.com, cloudflare.com, www.shopify.com.

  2. AFAIK, cloudflare only announce specific IPs to exchange, so in order for your ISP to enjoy Cloudflare’s Hungary server, they need to establish direct peering with Cloudflare.

This test will do that automatically: https://cloudflare-test.judge.sh

According to the Membership page, AS5483 has a selective peering policy, so they may not actually be peering with Cloudflare over the exchange, or may be exchanging only a limited set of routes. Members | Budapest Internet Exchange

No, there is a Hungarian BiX:
https://www.bix.hu/statistics/cloudflare/74f95dbe523e82021dbe2d9ace41a134

Seems to me the packets routes over different country before come back to BUD.
Usually the ping in the country less than 20ms.

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