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Anycast2 UK routing to JNB and FR

Hi I'm getting really bad routing from my UK ISP A&A, to `anycast.dns2.nextdns.io`

For IPv6 it's going to France with 60% packet loss in NTT `AS2914 ae-0.r21.londen12.uk.bb.gin.ntt.net (2001:728:0:2000::26d) `

For IPv4 to Johannesburg with 50% packet loss at `AS37100 ce-0-1-7.cr-02-cpt.za.seacomnet.com (105.25.160.125) `

More details below. 

I know in theory this doesn't matter, but in practice I'm getting worse DNS resolving latency than I used to. 

 

IPv6

```

-> anycast.dns2.nextdns.io (2a07:a8c1::) 2023-08-08T22:06:49+0100
Keys:  Help   Display mode   Restart statistics   Order of fields   quit
                                                                                                    Packets               Pings
 Host                                                                                             Loss%   Snt   Last   Avg  Best  Wrst StDev
1. AS20712 t.gormless.thn.aa.net.uk (2001:8b0:0:53::127) 0.0% 12 8.1 8.0 7.8 8.2 0.1
2. AS2914 ntt.d.aimless.thn.aa.net.uk (2001:728:0:5000::682) 0.0% 12 8.3 8.1 7.6 8.6 0.3
3. AS2914 xe-1-3-3-2.a02.londen12.uk.bb.gin.ntt.net (2001:728:0:5000::681) 0.0% 12 8.2 10.5 8.0 22.2 4.2
4. AS2914 ae-0.r21.londen12.uk.bb.gin.ntt.net (2001:728:0:2000::26d) 66.7% 12 13.6 13.2 9.1 15.7 2.9
5. AS2914 ae-16.r20.frnkge13.de.bb.gin.ntt.net (2001:728:0:2000::15e) 0.0% 12 19.5 23.2 19.2 42.6 7.8
6. AS2914 ae-0.a03.frnkge13.de.bb.gin.ntt.net (2001:728:0:2000::51) 0.0% 12 19.2 22.2 18.9 47.7 8.1
7. AS2914 xe-1-4-2-3.a03.frnkge13.de.ce.gin.ntt.net (2001:728:0:5000::6f6) 0.0% 12 19.4 21.2 19.0 38.7 5.5
8. AS??? ethernetae2-sr2.fkt3.constant.com (2001:19f0:fc00::a4b:236) 0.0% 12 20.9 21.3 20.8 24.0 0.9
9. AS??? ethernetswp26-ds1-u3-r53b02-a.fkt3.constant.com (2001:19f0:fc00::a4b:39a) 0.0% 12 20.9 20.9 20.5 21.3 0.3
10. (waiting for reply)
11. AS34939 dns2.nextdns.io (2a07:a8c1::) 0.0% 11 19.0 19.0 18.6 19.6 0.3

```

IPV4

```

-> anycast.dns2.nextdns.io (45.90.30.0) 2023-08-08T21:46:26+0100
Keys:  Help   Display mode   Restart statistics   Order of fields   quit
                                                                                                    Packets               Pings
 Host                                                                                             Loss%   Snt   Last   Avg  Best  Wrst StDev
1. AS20712 t.gormless.thn.aa.net.uk (90.155.53.127) 0.0% 44 8.3 8.3 7.7 13.7 0.9
2. AS20712 k-aimless.thn.aa.net.uk (90.155.53.101) 0.0% 44 8.3 8.3 7.8 11.3 0.6
 3. AS???    195.66.226.41 (195.66.226.41)                                                         0.0%    44   11.9  10.0   8.3  40.1   5.4
4. AS37100 ae-1.cr-02-lhr.uk.seacomnet.com (105.16.35.2) 0.0% 43 164.8 165.7 163.7 181.5 3.1
5. AS37100 ce-0-1-7.cr-02-cpt.za.seacomnet.com (105.25.160.125) 40.5% 43 164.7 165.0 164.5 167.0 0.5
6. AS37100 ce-0-1-5.cr-02-jnb.za.seacomnet.com (105.16.14.193) 0.0% 43 165.1 165.5 164.6 166.8 0.4
7. AS37100 ce-1-0-2.er-02-jnb.za.seacomnet.com (105.16.29.10) 0.0% 43 164.2 164.4 163.2 175.4 2.1
 8. AS37100  105.22.45.90 (105.22.45.90)                                                           0.0%    43  165.4 169.6 165.0 228.7  13.7
 9. AS42473  213.227.178.32 (213.227.178.32)                                                       0.0%    43  165.0 167.6 164.6 216.8  10.1
10. AS34939 dns2.nextdns.io (45.90.30.0) 0.0% 43 164.2 164.6 163.6 170.5 1.3

```

5 replies

null
    • NextDNs
    • 1 yr ago
    • Reported - view

    Please provide a https://nextdns.io/diag

      • S_M
      • 1 yr ago
      • Reported - view

      NextDNS Sorry this took me a while. Seems to have shifted again - I'm still getting Anycast2 IPv4 going to Jo'burg but IPv6 is going to Amsterdam now

       

      https://nextdns.io/diag/14b5c650-3adb-11ee-bee1-c7165c129312

      • NextDNS_Network
      • 1 yr ago
      • Reported - view

       Hi, we've made some changes. Could you check if it's still going to JNB now?

      • S_M
      • 1 yr ago
      • Reported - view

       thank you. I’ve run it again and still looks like it’s doing a round trip to JNB unfortunately. 
       

      Not sure if it’s relevant but the latency goes high even when it’s to UK Seacomnet. I don’t know who they are though…

      https://nextdns.io/diag/4878fee0-3c0b-11ee-bb7f-0d911b22bd14

      • S_M
      • 1 yr ago
      • Reported - view

       

       

      looks like you’ve worked your network magic. Latest test is only Anycasting to London and Amsterdam. No JNB. Thank you! And thanks also for a great product. 
       

      https://nextdns.io/diag/b68f2c70-3d6d-11ee-8d5f-992a44248c36

Content aside

  • 1 yr agoLast active
  • 5Replies
  • 76Views
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