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rtcweb-wg / rtcweb-transport

draft-ietf-rtcweb-transport
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IPv6: If a box has multiple IPv6 addresses, should we try all of them? #14

Closed alvestrand closed 8 years ago

alvestrand commented 8 years ago

Some systems keep old IPv6 addresses around even when changing to new for privacy.

How should we avoid trying the ones that don't make sense to try?

nils-ohlmeier commented 8 years ago

As documented here: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1542523 and here: https://bugzilla.gnome.org/show_bug.cgi?id=761740 it appears that the implementers claim everything is working as designed on systems which accumulate several temporary deprecated IPv6 addresses.

My assumption here is that using deprecated temp addresses as ICE candidates (additionally to the non deprecated temporary address) is not going to increase the likeliness of establishing a connection. So adding these additional ICE candidates only causes extra over head.

Therefore adding a warning/clarification statement for implementers to avoid deprecated temporary IPv6 addresses (in case there is usable non-deprecated temporary IPv6 address available) seem appropriate.

alvestrand commented 8 years ago

Adding warning in -12: "If some of the temporary IPv6 addresses, but not all, are marked deprecated, the client SHOULD discard the deprecated addresses."

nils-ohlmeier commented 8 years ago

Sounds good to me.

alvestrand commented 8 years ago

Addressed in #15 (version -12)