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Standard User argo
(newbie) Thu 29-Dec-22 18:38:04
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Giganet routing to anycast IP in Brazil


[link to this post] 		 
The route from Giganet to anycast b.gtld-servers.net (192.33.14.30) is currently going to Brazil.
Given there are several European locations for the same IP - I suspect there is some misconfiguration, probably with BGP or route announcements.
Can someone shed some light why this is happening?

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HOST: xxx-xxxx                                                 Loss%   Snt   Last   Avg  Best  Wrst StDev
  1. AS???    TECHNICOLOR (192.168.1.1)                        0.0%     5    0.0   0.0   0.0   0.0   0.0  2. AS198440 lns.ld8.m12.net.uk (37.48.224.15)                0.0%     5    4.0   4.0   3.0   5.0   0.7
  3. AS198440 ge-1-0-1-10.core.ld8.m12.net.uk (37.48.224.87)   0.0%     5    3.0   4.0   3.0   6.0   1.2  4. AS8553   195.66.227.204                                   0.0%     5   71.0  72.4  71.0  74.0   1.1
  5. AS52320  globenet.ftlza.br.as52320.net (200.16.69.3)      0.0%     5  137.0 139.0 137.0 141.0   1.4  6. AS52320  45.238.96.150                                    0.0%     5  188.0 201.2 188.0 249.0  26.7
  7. AS???    ???                                             100.0     5    0.0   0.0   0.0   0.0   0.0  8. AS53087  162.71.75.177.in-addr.arpa (177.75.71.162)       0.0%     5  194.0 199.2 194.0 216.0   9.4
  9. AS53087  143.79.75.177.in-addr.arpa (177.75.79.143)       0.0%     5  189.0 189.4 189.0 190.0   0.5 10. AS53087  51.70.75.177.in-addr.arpa (177.75.70.51)         0.0%     5  187.0 187.8 186.0 189.0   1.3
 11. AS???    ???                                             100.0     5    0.0   0.0   0.0   0.0   0.0 12. AS53087  127.240.33.187.in-addr.arpa (187.33.240.127)     0.0%     5  187.0 187.4 187.0 188.0   0.5
 13. AS53087  250.71.75.177.in-addr.arpa (177.75.71.250)       0.0%     5  169.0 163.6 162.0 169.0   3.0 14. AS???    ???                                             100.0     5    0.0   0.0   0.0   0.0   0.0
 15. AS36625 40717 396571 396613 396b.gtld-servers.net (192.33.14.30)                0.0%     5  157.0 156.6 156.0 157.0   0.5



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Standard User jchamier
(eat-sleep-adslguide) Fri 30-Dec-22 17:31:39
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Re: Giganet routing to anycast IP in Brazil


[re: argo] [link to this post] 		 
In reply to a post by argo:
Can someone shed some light why this is happening?
The owner of the IP or the AS it is within may have misannounced a route?

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Standard User candlerb
(knowledge is power) Fri 30-Dec-22 18:35:53
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Re: Giganet routing to anycast IP in Brazil


[re: argo] [link to this post] 		 
I see the same from Cerberus (also going via 195.66.227.204 at the LINX), so it's not just Giganet.

The LINX route collector shows .204 as Globenet:
https://alice-collector.linx.net/search?q=192.33.14....

It looks like there ought to be better routes, but peering policies can be strange.


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