Can someone clarify a few things for me:
1) Does MAP support this scenario (example):
- (BMR) Rule 1:
Rule IPv6 Prefix: 2001::/40
Rule IPv4 Prefix: 192.0.2.0/24
Rule EA-bits length: 12
- (BMR) Rule 2:
Rule IPv6 Prefix: 2001::/40
Rule IPv4 Prefix: 200.0.2.0/24
Rule EA-bits length: 12
The only difference between these two rules above is the 'Rule
IPv4 Prefix', everything else is the same. My obvious answer would be that this
scenario is not supported but wanted to be sure that I'm not missing anything.
This scenario above would result in ambiguity between CEs, i.e. a single IA-PD
that is delegated to a CE can be associated with either of the two rules above
(EA bits can be the same for a CE from 192.0.2.0/24 range and for a CE from
200.0.2.0/24 range.
In this example above, it is assumed that the delegated prefix (IA-PD) that
DHCPv6 Server is handing out to CEs is 2001::/40 with delegated prefix length
/56.
This makes me believe that each rule must not only be unique
(because the above two rules are unique) but instead each rule must have a
unique 'Rule IPv6 prefix' and a unique 'Rule IPv4 Prefix' per 'Rule IPv6
prefix' (IPv4 uniqueness is important in the downstream direction where lookup
is performed based on IPv4).
2) What constitutes a MAP domain? I'd think a unique 'Rule IPv6 Prefix'
which (assuming that 1) is correct) would mean that a Domain = BMR. In other
words, can a MAP domain contain a collection of BMRs? The drafts mention
virtual-links, etc...but it would be simpler if we can say Domain=BMR (not sure
if this is accurate though). Of course, nodes sharing the same set of those
rules would be in the same MAP domain.
3) Is overlapping of 'Rule IPv6 Prefixes' supported?
For example in the above case, can we have for Rule 2) the 'Rule IPv6 prefix'
as 2001:0:80::/42.
In this case the 'Rule IPv6 Prefix' from Rule 1 overlaps with 'Rule IPv6
Prefix' from Rule 2. I assume that this would not be supported for the same
reason as in 1). I didn't think about the applicability of this scenario for
now, it is more of a theoretical question.
Thanks,
Kris
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