OK, how about this for the complete paragraph:
"By default, the MAP subnetwork identifier is the first subnetwork
within the End-user IPv6 prefix (all bits set to zero). An alternative
subnetwork value MAY be configured. All nodes within a MAP domain MUST
be configured to use the same value of the subnetwork identifier."
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.
Tom
On 09/04/2013 6:51 AM, Ole Troan wrote:
Tom,
In Section 5.2 of -map-05, there is the paragraph:
The MAP subnet ID is defined to be the first subnet (all bits set to
zero). Unless configured differently, a MAP node MUST reserve the
first IPv6 prefix in an End-user IPv6 prefix for the purpose of MAP.
Question: does the second sentence say anything different from the first one?
Question: if the MAP node is configured differently, how will other nodes be
able to synthesize its MAP IPv6 address from the FMR?
all nodes within the domain must use the same subnet-id. perhaps we could make
that clearer.
cheers,
Ole
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