[tor-bugs] #19610 [Core Tor/Tor]: IPv6-only clients fetch microdescriptors from 15/25 IPv6 fallbacks

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#19610: IPv6-only clients fetch microdescriptors from 15/25 IPv6 fallbacks
-------------------------------------------------+-------------------------
 Reporter:  teor                                 |          Owner:
     Type:  defect                               |         Status:  new
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  unspecified
Component:  Core Tor/Tor                         |        Version:  Tor:
                                                 |  0.2.8.4-rc
 Severity:  Normal                               |     Resolution:
 Keywords:  ipv6, microdesc, fallbacks, triage-  |  Actual Points:
  out-030-201612                                 |
Parent ID:  #17217                               |         Points:  1
 Reviewer:                                       |        Sponsor:
-------------------------------------------------+-------------------------
Changes (by teor):

 * parent:   => #17217
 * milestone:  Tor: 0.3.1.x-final => Tor: unspecified


Comment:

 #19608 was fixed in 0.3.0.2-alpha, and we mitigated this issue by
 selecting 53 IPv6 fallbacks in #18828. We should continue to choose 200+
 fallbacks, and encourage relay operators to enable their IPv6 ORPorts.

 This will not be an issue until clients use IPv6 by default (#17217).

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/19610#comment:5>
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