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RD
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... aggregation and abstraction. It
allows reduction of topological information by replacing a sequence
of RDIs carried by the RD_PATH attribute with a single RDCI. It also
allows reduction of the amount of information related to transit
...
... +-----+-----+----------------------------------------+
| 47 | 0005| DFI | AA | Rsvd | RD | Area | ID | SEL |
+-----+-----+----------------------------------------+
octets | 1 | 2 | 1 | 3 | 2 | 2 | 2 | 6 | 1 |
...
... NSAP format, two fields
are defined in addition to those required by IS-IS. These fields, RD
and Area, are defined to allow allocation of NSAPs along topological
...
... NSAPs along topological
boundaries in support of increased data abstraction. Administrations
assign RD identifiers underneath their unique address prefix (the
...
... GSA (implying that the first four octets of the address would be
those assigned out of the GOSIP space), or based on an RD value from
its provider (implying that the first seven octets of the address ...
... addressing authority. Thus, the areas within the subscriber RD
should take their NSAPs from the prefix ...
... AA identifier kkk, NIST could be assigned an RD of jjj,
resulting in a unique prefix for SURANet of:
...
... treated. For example, a somewhat conservative policy might be that
an attached subscriber RD may use any NSAP address prefix, but that
...
... routing information exchanged across the private links
sees very limited distribution, usually only to the RD at the other
end of the link. Thus, there are no address ...
... domain is connected through a private link to an RD. Further, this
RD participates in an internet ...
... link to an RD. Further, this
RD participates in an internet that subscribes to the global OSI ...
... addressing plan (i.e., ISO 8348). This RD must be able to
distinguish between the zero-homed routing domain ...
... prefix assigned to it as its RDI.
A multihomed RD should use one of the NSAP prefixes assigned to it as
...
... DSP------------->|
+-----+-----+----------------------------------------+
| 39 | 840 | DFI |ORG | Rsvd | RD | Area | ID | SEL |
+-----+-----+----------------------------------------+
octets | 1 | 2 | 1 | 3 | 2 | 2 | 2 | 6 | 1 |
...