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Extensions - OSPFv2 Extensions Reachability Link Attributes Scoping Hierarchy OSPFv2 Extend top level Node Attribute sub-TLVs to support address IPv4/IPv6 prefixes (two new sub-TLVs) Discriminate between termination and switching capability: additional ISCD sub-TLV TE link advertisements association to their resp. local-remote TE Router_ID relationship(s) new sub-TLV of top level link TLV (local/remote TE Router_ID) Prefixes part of the reachability advertisements association to their respective local TE Router_ID new sub-TLV of top level Node attribute TLV (local TE Router_ID) LSA import/export rules/conditions (TE LSA, Type 1) Per area, selection of upward info dissemination (U bit in TE router cap. TLV) RC with highest router ID (selection) downward info dissemination (D bit in TE router cap. TLV) RC with highest router ID (selection) + Down Associated Area ID Loop prevention mechanism: Associated Area ID sub-TLV |