On Fri, 1 Feb 2002 [EMAIL PROTECTED] wrote: > When reading RFC 3056 (6 to 4 strategy), I have 2 questions I could not > get answered. Consider the router that originates the IPv4 tunnel. Which > IP address should this router use as the source IP addres in its IPv4 > encapsulation header: > > * Should this address be the router id of this router? > Or
If router-id is V4ADDR in 2002:V4ADDR. > * Should the source IPv4 address be derived from the source IPv6 address > Or > ...? Yes. See RFC3056 Chapter 3: IPv6 packets are transmitted in IPv4 packets [RFC 791] with an IPv4 protocol type of 41, the same as has been assigned [MECH] for IPv6 packets that are tunneled inside of IPv4 frames. The IPv4 header contains the Destination and Source IPv4 addresses. One or both of these will be identical to the V4ADDR field of an IPv6 prefix formed as specified above (see section 5 for more details). The IPv4 packet body contains the IPv6 header and payload. (btw, this is ngtrans, rather than ipng, material) -- Pekka Savola "Tell me of difficulties surmounted, Netcore Oy not those you stumble over and fall" Systems. Networks. Security. -- Robert Jordan: A Crown of Swords -------------------------------------------------------------------- IETF IPng Working Group Mailing List IPng Home Page: http://playground.sun.com/ipng FTP archive: ftp://playground.sun.com/pub/ipng Direct all administrative requests to [EMAIL PROTECTED] --------------------------------------------------------------------
