[tor-bugs] #33045 [Core Tor/Tor]: Increase the number of Tor network relays that support IPv6

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#33045: Increase the number of Tor network relays that support IPv6
--------------------------+--------------------------------
 Reporter:  gaba          |          Owner:  (none)
     Type:  project       |         Status:  new
 Priority:  Medium        |      Milestone:
Component:  Core Tor/Tor  |        Version:
 Severity:  Normal        |     Resolution:
 Keywords:                |  Actual Points:
Parent ID:                |         Points:
 Reviewer:                |        Sponsor:  Sponsor55-must
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Comment (by teor):

 Replying to [comment:9 teor]:
 > Replying to [comment:8 nusenu]:
 > > Replying to [comment:7 teor]:
 > > > nusenu, you're also using some different calculations from the
 grant:
 > > > * you're calculating Guard IPv6 consensus weight fraction
 > >
 > > I don't know about the grant but I can explain what my value says, it
 is not what you think it is.
 > >
 > > I'm not looking at cw fraction to calculate the "Guard: 29.06%" line
 above.
 > >
 > > I take and sum up onionoo's guard_probability [1] value of relays that
 have an IPv6 OrPort.
 > > The guard_probability of relays having the exit flag is always 0, with
 one exception:
 > > If the relay has the Exit and BadExit flags, in this specific but rare
 case the exit
 > > relay can have a non-zero guard probability.
 >
 > Great, so we're using similar calculations.
 >
 > > > * the grant uses Guard-but-not-Exit IPv6 consensus weight fraction
 > >
 > > If the grant is about supporting Tor clients only (which I hope it is
 not since I thought client-to-guard supports IPv6 already) than it seems
 odd
 > > to use cw fraction instead of "what fraction of guard capacity is
 reachable via IPv6?" metrics.
 >
 > The grant is about increasing the number of relays on IPv6, so that it's
 safer for clients to use IPv6:
 > https://trac.torproject.org/projects/tor/wiki/org/sponsors/Sponsor55
 >
 > > [1]
 https://metrics.torproject.org/onionoo.html#details_relay_guard_probability

 Thanks for this feedback, I have explicitly described the divisors for
 each calculation in my draft proposal 313:
 https://lists.torproject.org/pipermail/tor-dev/2020-February/014158.html

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/33045#comment:11>
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