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OSPF Extension Chronology RFC 2370 – Adds Opaque LSAs with flooding scope built into types. Backward compatible introduction of new LSAs. RFC 2740 – OSPFv3 Generalized flooding of unknown LSAs LSID no longer denotes route prefix Separation of intra-area topology and prefix information RFC 3623 – OSPFv2 Graceful Restart – Uses link scoped opaque LSA. RFC 3630 – OSPFv2 Traffic Engineering Uses area scoped LSAs OSPFv2 MTR – Reuses TOS routing metrics |