April 2003
Intermediate to advanced
768 pages
20h
English
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RFC 1587: The OSPF NSSA Option
This RFC provides a description of a new type of optional OSPF area, the “not-so-stubby” area or NSSA. This optional stubby area is similar in operation to the existing stubby areas, but it has the additional capability to import external OSPF routes from the AS to which it belongs.
This RFC is good reading and its authors should be commended for bringing some of the real world into their discussion on the “not-so-stubby” area discussion. This RFC details a problem seen with the implementation of OSPF at the time of its writing. They provide a good scenario and supporting documentation about the issue this RFC addresses.
Within this RFC, the authors propose adding a new option bit, referred to as the “N” bit and ...