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OSPF Route Type Attribute

The route type attribute carries the OSPF area ID and LSA type, as indicated in Table 66:

Table 66: Route Types and Route Origins

Type of Route	Origin of Route
1 – intra-area route	Type 1 LSA
2 – intra-area route	Type 2 LSA
3 – interarea summary route	Type 3 LSA
5 – external route (area ID = 0)	Type 5 LSA
7 – external route (area ID = 0)	Type 7 LSA

MP-BGP uses the route type conveyed by this extended community attribute to determine the best OSPF route when it installs the routes in the VRF forwarding table on the destination PE router.

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