Le 2014-01-21 10:25, [email protected] a écrit :
[ian] The current text describes how the CPE creates the /128 prefix to use as its tunnel endpoint (when its provisioned with DHCPv6). This prefix has been constructed using an existing /64 prefix and a suffix that has been learnt through the v4 configuration information in OPTION_S46_LW4o6. The CPE can’t try and build a tunnel until it has received all of these parameters, as it wouldn’t have a tunnel endpoint address for the lwAFTR either.
Ok, good, this is as I expected.
So, it learns the parameters over DHCPv6, creates the tunnel source /128 based on these parameters and builds the tunnel from there. In all likelihood, there is also a SLAAC or IA_NA address on also that interface, but as the lw4o6 client is configuring the source prefix as well as building the tunnel, the right prefix is the one that its just configured. Is the current text not conveying this, or do you think that there’s something wrong with the method?
As I read it, the current text is not conveying this. I would suggest: OLD: An IPv6 address from an assigned prefix is also required for the lwB4 to use as the encapsulation source address for the softwire. In order to enable end-to-end provisioning, the IPv6 address is constructed by taking the /64 prefix assigned to the WAN interface (learned via SLAAC, DHCPv6 or manual configuration) and suffixing 64-bits for the interface identifier. The /128 prefix is constructed as follows: NEW: An IPv6 address from an assigned prefix is also required for the lwB4 to use as the encapsulation source address for the softwire. In order to enable end-to-end provisioning, the IPv6 address is constructed by taking a /64 prefix assigned to the WAN interface and suffixing 64-bits for the interface identifier. As there may be multiple WAN prefixes, of which only one can be used for lw4o6, the CPE is provisioned with the knowledge of which one to take. The /128 prefix is then constructed as follows: Simon -- DTN made easy, lean, and smart --> http://postellation.viagenie.ca NAT64/DNS64 open-source --> http://ecdysis.viagenie.ca STUN/TURN server --> http://numb.viagenie.ca _______________________________________________ Softwires mailing list [email protected] https://www.ietf.org/mailman/listinfo/softwires
