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[tor-commits] [torspec/master] Prop 311: Add Optional IPv6 Bandwidth Self-Tests



commit 58000de4faea96761d9e87dcd7cb1fcef63e961e
Author: teor <teor@xxxxxxxxxxxxxx>
Date:   Mon Feb 10 12:46:12 2020 +1000

    Prop 311: Add Optional IPv6 Bandwidth Self-Tests
    
    Add an optional change that makes relays do bandwidth self-tests over
    IPv6.
    
    This change increases the connection and bandwidth IPv6 statistics.
    Related to proposal 313, which covers IPv6 statistics.
    
    Related to 33159.
---
 proposals/311-relay-ipv6-reachability.txt | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/proposals/311-relay-ipv6-reachability.txt b/proposals/311-relay-ipv6-reachability.txt
index 978dc9b..e4c9414 100644
--- a/proposals/311-relay-ipv6-reachability.txt
+++ b/proposals/311-relay-ipv6-reachability.txt
@@ -573,6 +573,27 @@ Ticket: #24404
    network makes it more likely that an existing connection can be used for
    the final hop of a relay IPv6 ORPort reachability check.
 
+4.4.5. Relay Bandwidth Self-Tests Over IPv4 and IPv6
+
+   In this proposal, we only make relays (and bridges) use IPv6 for their
+   reachability self-tests.
+
+   We propose this optional change, to improve the accuracy of relay (and
+   bridge) bandwidth self-tests:
+
+   Relays (and bridges) perform bandwidth self-tests over IPv4 and IPv6.
+
+   If we implement good abstractions for relay self-tests, then this change
+   will not need much extra code.
+
+   If we implement IPv6 extends for all relay circuits (see section 4.4.4),
+   then this change will effectively be redundant.
+
+   Doing relay bandwidth self-tests over IPv6 will create extra IPv6
+   connections and IPv6 bandwidth on the tor network. (See
+   [Proposal 313: Relay IPv6 Statistics].) In addition, some client circuits
+   may use the IPv6 connections created by relay bandwidth self-tests.
+
 4.5. Alternate Reachability Designs
 
    We briefly mention some potential reachability designs, and the reasons that



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