CCNP Enterprise Core (350-401) Cisco Routing

OSPF LSA Type 1: Router Link

Every router in an OSPF network advertises a Type 1 LSA.

The Type 1 LSA is a essential part within the link state database.

An entry exists as a Type 1 LSA for every OSPF enabled link including its interface, and attached networks.

Type 1 LSAs are not advertised outside of an area.

The packet fields on a Type 1 LSA give an indication of the Router ID for the advertising router, LSA age, LSA sequence number, link count and link ID.

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