February 1998
Intermediate to advanced
368 pages
10h 7m
English
Content preview from OSPF: Anatomy of an Internet Routing ProtocolBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 7. OSPF Extensions
The base OSPF protocol has changed only slightly since the OSPF Version 2 specification was first published in [176] in 1991. The OSPF version number is still 2, and today’s OSPF implementations still interoperate with those written in 1991. However, this is not to say that nothing has changed in OSPF since 1991. There have been a number of bug fixes and optimizations made to the specification as a result of field experience and an increasing number of independent OSPF implementations, as documented in Chapter 3. Also, there have been a steady stream of optional extensions to OSPF, ranging from multicast routing to protocol extensions enabling efficient use of dial-up circuits, such as ISDN. These optional extensions—their ...
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