Talk:Teredo tunneling

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[edit] Teredo relay route export

I could find no evidence of any BGP export requirement for Teredo relays in RFC 4380. For the Teredo service to operate properly, at least one relay as to export a route through BGP, because not all autonoumous systems will ever have their own Teredo relays. That does not imply all Teredo relays have to do BGP export (the same considerations apply to 6to4 relays).

RFC 4380 actually refers to “the IPv6 routing protocols” (§ 5.4, emphasis added), which supposedly include not only BGP, but also interior routing protocols (OSPF, IS-IS, or even RIPng and manual setup) and adds that a relay might serve as few as a single IPv6 host, i.e. itself.

In addition to that, RFC 4380 also mentions the “range of IPv6 addresses served by the relay” (§ 5.4.3). This hardly make sense if all relay have to use BGP, in which case the range of IPv6 would supposedly be the whole IPv6 Internet.

This accounts for my reversal of Jec's commit 54646349 (03:34, 23 May 2006). Someone might still want to clarify the text involved.

-- Rdenis

Confusion on my end -- the “direct connectivity test” procedure makes it possible to have symmetric routing without global IPv6 reachability of all relays. Thanks for correcting. --Jec 19:39, 28 May 2006 (UTC)