[tor-bugs] #21637 [Metrics/Onionoo]: Onionoo should distinguish between declared and reachable IPv6 or_addresses

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#21637: Onionoo should distinguish between declared and reachable IPv6 or_addresses
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     Reporter:  teor             |      Owner:  metrics-team
         Type:  enhancement      |     Status:  new
     Priority:  Medium           |  Milestone:
    Component:  Metrics/Onionoo  |    Version:
     Severity:  Normal           |   Keywords:
Actual Points:                   |  Parent ID:
       Points:                   |   Reviewer:
      Sponsor:                   |
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 When a relay declares an IPv6 OR address, it puts it in its descriptor,
 and it gets placed in the microdescriptor automatically.

 But the IPv6 addresses in the full consensus are different: authorities on
 IPv6 only vote for an IPv6 address if they believe it is reachable.

 (There are no IPv6 addresses in the microdesc consensus, see #20916.)

 This makes a difference on Atlas tickets like #10401.

 (It doesn't make a difference to client behaviour yet, because microdescs
 are the default. We'll fix that in #20916.)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21637>
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