Re: [Softwires] 4rd-addmapping - Possible independence of the IPv6 addressing plan from IPv4 prefixes

[Rémi Després <[e-mail]>]

Hi Washam,
 
Le 21 oct. 2011 à 16:55, Washam Fan a écrit :

> Hi Remi,
> 
> Please see inline.
> 
> 2011/10/21 Rémi Després <[e-mail]>:
> 
> 
>> The PSID is WITHIN the /60 (at its end).
>> The IPv6 /64 prefix to be used to reach a CE contains:
>> 1) The Rule IPv6 prefix (that of the rule whose IPv4 prefix matches the IPv4
>> destination)
>> 2) The IPv4 suffix (that part of the IPv4 destination that follows the IPv4
>> prefix of the matching rule)
>> 3) The PSID (whose length is known iff the matching rule specifies a CE
>> IPv6-prefix length)
>> 4) 
>> 5) A 0 padding if fields 1 to 4 don't reach 64 bits
> 
> What if fields 1 to 4 exceed 64 bits? truncated, right?

Yes.
4) would have better been written "If the PSID length is unknown, the "PSID complement" (remainder of the Max PSID, truncated if necessary for the subnet prefix not to exceed 64 bits).

> Want to confirm again from you. The max length of CE IPv6 prefix is 64
> bits, right?

Yes.

Regards,
RD