Enable relays to talk to other relays via IPv6

We need to extend Tor for relays to talk to other relays via IPv6. This task depends on #4564 (moved). The exact steps will be described in the roadmap that comes out of #4556 (moved).

This ticket is an optional deliverable for June 30, 2012 for sponsor G.

changed milestone to %Tor: unspecified

added component::core tor/tor ipv6 milestone::Tor: unspecified needs-design owner::ln5 parent::24405 points::5 priority::medium severity::normal status::assigned tor-relay type::project labels

We don't have a person to lead this deliverable yet.

Trac:
Owner: karsten to N/A
Status: new to assigned

Moving to the September milestone, because did not finish everything by end of June.

Trac:
Milestone: Sponsor G: June 30, 2012 to Sponsor G: September 30, 2012

Assigning to ln5 after talking to him, because this ticket is related to #4563 (moved) and #4564 (moved) which are quite related. The ticket is an optional sponsor deliverable for September 30.

Trac:
Owner: N/A to ln5

Switching from using milestones to keywords for sponsor deliverables. See #6365 (moved) for details.

Trac:
Milestone: Sponsor G: September 30, 2012 to N/A
Keywords: N/A deleted, SponsorG20120930 added

Trac:
Keywords: SponsorG20120930 deleted, SponsorG20120930 ipv6 added

Removing the sponsor keyword. It was always clear that this is an optional sponsor deliverable. We didn't make enough progress here to call it done, which is perfectly fine.

Trac:
Keywords: SponsorG20120930 ipv6 deleted, ipv6 added

Trac:
Milestone: N/A to Tor: unspecified

Trac:
Keywords: ipv6 deleted, ipv6 tor-relay added

Trac:
Component: Tor Relay to Tor

The roadmap in #4556 (moved) basically says "this relay-to-relay use of ipv6 will happen naturally over time".

Meaning, there isn't any discussion of whether it's a good idea to switch to ipv6 if both relays support it, or leave those tls connections on ipv4 since we still mandate all relays be able to speak ipv4.

So: is there some advantage to moving relay communications to ipv6? Maybe the routing is different and better? (I could imagine the routing being different and worse, in the case of folks who have the more centralized hurricane electric ipv6 connections.)

Trac:
Reviewer: N/A to N/A
Cc: nickm,ln5 to nickm, ln5
Severity: N/A to Normal
Sponsor: N/A to N/A

Trac:
Points: N/A to 5
Keywords: ipv6 tor-relay deleted, ipv6 tor-relay needs-design added

Trac:
Parent: N/A to #5788 (moved)

Replying to arma:

The roadmap in #4556 (moved) basically says "this relay-to-relay use of ipv6 will happen naturally over time".

Meaning, there isn't any discussion of whether it's a good idea to switch to ipv6 if both relays support it, or leave those tls connections on ipv4 since we still mandate all relays be able to speak ipv4.

So: is there some advantage to moving relay communications to ipv6? Maybe the routing is different and better? (I could imagine the routing being different and worse, in the case of folks who have the more centralized hurricane electric ipv6 connections.)

We'll try to answer this as part of #24403 (moved). But I think the answer will be: "just use either at random".

Trac:
Parent: #5788 (moved) to #24403 (moved)

Covered by #24405 (moved)

Trac:
Parent: #24403 (moved) to #24405 (moved)

changed time estimate to 40h

mentioned in issue #6375 (moved)

mentioned in issue #6939 (moved)

mentioned in issue #17726 (moved)

mentioned in issue #24403 (moved)

moved to tpo/core/tor#4565 (closed)

mentioned in issue tpo/core/tor#6375 (closed)