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Non ideal IPv6 Anycast2 Routing

Am in the UK. My ISP is Andrews & Arnold. 

I am getting unusual routing for IPv6 Anycast2 via Taiwan I think.  

Anycast1 is fine. 

```

# traceroute6 2a07:a8c1::xx
traceroute to 2a07:a8c1::xx

1 t.gormless.thn.aa.net.uk (2001:8b0:0:53::127) 8.181 ms 8.273 ms 7.939 ms
2 n-aimless.thn.aa.net.uk (2001:8b0:0:53::104) 8.432 ms 8.067 ms 8.125 ms
 3  *  *  *
 4  *  *  *
 5  *  *  *
 6  *  *  *
 7  *  *  *
 8  *  *  *
 9  *  *  *
10 as48024.ly.stuix.io (2a0f:5707:ffe3::92) 205.587 ms 2406:d400:1:133:203:163:222:156 (2406:d400:1:133:203:163:222:156) 220.452 ms as48024.ly.stuix.io (2a0f:5707:ffe3::92) 203.013 ms
11 po1-1950.cr01.tpe01.tw.misaka.io (2a0b:4342::99) 217.668 ms 215.349 ms 217.530 ms
12 po-12.lag.tpe01.tw.misaka.io (2407:b9c0:b000::12) 219.690 ms 217.584 ms 219.866 ms
```

Confirmed by ping.nextdns.io

```

anexia-lon              12 ms  (anycast2, ultralow2)

  anexia-lon (IPv6)       12 ms  (ultralow2)

  vultr-lon (IPv6)        12 ms  (anycast1)

  vultr-lon               12 ms  (anycast1)

  zepto-lon (IPv6)        12 ms  (ultralow1)

  zepto-lon               13 ms  (ultralow1)

  anexia-man              18 ms

  anexia-man (IPv6)       18 ms

  anexia-par              18 ms

  vultr-ams (IPv6)        19 ms

  anexia-par (IPv6)       19 ms

  netbarista-par (IPv6)   19 ms

  netbarista-par          20 ms

  virtua-par              20 ms

  vultr-ams               21 ms

  zepto-bru (IPv6)        21 ms

  virtua-par (IPv6)       24 ms

  fusa-bru                25 ms

  zepto-bru               25 ms

  fusa-bru (IPv6)         28 ms

  zepto-tpe (IPv6)       232 ms  (anycast2)

```

3 replies

null
    • S_M
    • 9 mths ago
    • Reported - view

    So looks like you've fixed it already? Or at least improved it? Thank you if so!

    I'm getting `vultr-fra (IPv6)` instead of `zepto-tpe (IPv6)` for my anycast2, which is a lot closer...

    Here's the `mtr`

                                                                        My traceroute  [v0.95]
A_A_x86 (2001:8b0:dc1b:1da1::1) -> 2a07:a8c1::31:527d (2a07:a8c1::xx:xxxx)                                                            2023-07-24T22:17:03+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%    48    7.9   8.0   7.6   8.4   0.2
2. AS2914   ntt.a.needless.tch.aa.net.uk (2001:728:0:5000::67e)                                                     0.0%    48    8.2   8.1   7.6   8.7   0.2
3. AS2914   xe-0-0-0-3-7.r04.londen05.uk.bb.gin.ntt.net (2001:728:0:5000::67d)                                      0.0%    47    8.9   9.1   8.6  10.7   0.3
4. AS2914   ae-7.r20.londen12.uk.bb.gin.ntt.net (2001:728:0:2000::5d)                                               0.0%    47    8.8  11.1   8.3  30.1   4.6
5. AS2914   ae-1.r21.londen12.uk.bb.gin.ntt.net (2001:728:0:2000::11e)                                              0.0%    47    8.2  10.1   8.2  15.7   1.7
6. AS2914   ae-16.r20.frnkge13.de.bb.gin.ntt.net (2001:728:0:2000::15e)                                             0.0%    47   19.9  24.1  18.9  54.4   9.5
7. AS2914   ae-0.a03.frnkge13.de.bb.gin.ntt.net (2001:728:0:2000::51)                                               0.0%    47   23.1  28.1  18.8  52.4   7.7
8. AS2914   xe-1-4-2-3.a03.frnkge13.de.ce.gin.ntt.net (2001:728:0:5000::6f6)                                        0.0%    47   19.6  22.4  18.6  49.0   6.8
9. AS???    ethernetae2-sr2.fkt3.constant.com (2001:19f0:fc00::a4b:236)                                             0.0%    47   20.9  22.1  20.8  34.1   2.5
10. AS???    ethernetswp26-ds1-u3-r53b02-b.fkt3.constant.com (2001:19f0:fc00::a4b:39e)                               0.0%    47   19.2  19.4  19.0  20.2   0.3
11. (waiting for reply)
12. AS34939  dns2.nextdns.io (2a07:a8c1::xx:xxxx)                                                                    0.0%    47   20.2  20.5  20.1  21.1   0.2

    Here's `ping.nextdns.io`

    ■ anexia-lon              10 ms  (anycast2, ultralow2)
  anexia-lon (IPv6)       11 ms  (ultralow2)
  vultr-lon               11 ms  (anycast1)
  vultr-lon (IPv6)        11 ms  (anycast1)
  zepto-lon (IPv6)        11 ms  (ultralow1)
  zepto-lon               11 ms  (ultralow1)
  vultr-ams (IPv6)        16 ms
  anexia-man (IPv6)       17 ms
  vultr-ams               17 ms
  anexia-par (IPv6)       17 ms
  virtua-par              18 ms
  netbarista-par          18 ms
  anexia-par              18 ms
  netbarista-par (IPv6)   18 ms
  anexia-man              18 ms
  zepto-bru (IPv6)        21 ms
  virtua-par (IPv6)       21 ms
  zepto-bru               22 ms
  vultr-fra (IPv6)        22 ms  (anycast2)
  fusa-bru                25 ms
  fusa-bru (IPv6)         27 ms
    • chiefk60vitz
    • 9 mths ago
    • Reported - view

    Any cast is something that hackers use to see your PC unless you're talking about the casting to the TV otherwise from your Android it should be using screen mirroring for any cast if that's what you're talking about but if you're otherwise if you do not using a screen mirroring program that's a hack to begin with

      • R_P_M
      • 9 mths ago
      • Reported - view

       That’s a completely different thing in this instance.

      What @s_m is talking about is a Anycast IP address, which in simple terms means for one IP address you can be routed to any number of different servers, in good practice to the closest possible server for your connection. 

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Content aside

  • 9 mths agoLast active
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