Re: [Softwires] MAP-E question -- first prefix

[Tom Taylor <[e-mail]>]

Looks like we had a misunderstanding. Did the authors think of the 
configured subnetwork identifier of the existing text as being 
configured for a particular rule, in effect another rule parameter? I 
took it to be configured as a single value used in conjunction with all 
FMRs to calculate the target MAP IPv6 addresses.

On 10/04/2013 6:54 AM, Ole Troan wrote:
> Tom,
>
>>>> I think that captures the intent. However, I see a possible difficulty: differing lengths of the End-user IPv6 prefix for different CEs. We have to add two conditions:
>>>>
>>>> -- the configured subnetwork identifier is at least
>>>>             64 - min (n + o)
>>>> bits long, where the minimization is taken over all FMRs in the domain
>>>>
>>>> -- the subnetwork identifier used with a given calculated End-user IPv6 prefix uses the right-most (64 - (n + o)) bits of the configured subnetwork identifier, where (n + o) is taken from the FMR used for the calculation.
>>>>
>>>> Seems simpler just to restrict to the all-zeros value, but please comment.
>>>
>>> I can't see how different End-user IPv6 prefix lengths within a domain can work.
>>>
>>
>> The End-user IPv6 prefix length obviously has to be the same for all nodes using the same BMR, but couldn't, for example, the PSID width (i.e., the sharing ratio) vary from one BMR to another?
>
> absolutely. 'everything' can be different between different BMRs within the same domain.
>
> cheers,
> Ole
>
>