What are different LSA in OSPF?
Before we begin, let’s take a quick look at the different type of OSPF LSA packets we’ll cover: LSA Type 7: OSPF Not So Stubby Area (NSSA) External LSA. LSA Type 8: OSPF External Attributes LSA (OSPFv2) / Link Local LSA (OSPFv3) LSA Type 9: OSPF Link Scope Opaque (OSPFv2) / Intra Area Prefix LSA (OSPFv3)
Why is type 4 LSA required?
LSA 4 is generated by the ABR. Link ID in that is the router ID of ASBR and Adv. Router is the ASBR itself. LSA 4 is required to tell the routers in other areas how to reach the ASBR to get to external network eventually.
What defines the relationship between Type 5 and Type 7 LSAs?
The difference between Type-5 LSA and Type-7 LSA is that Type-7 LSA can live only into NSSA area, so it will never leave the NSSA area. Instead Type-5 LSA can be propagated to the other areas (backbone and non-backbone). – Both of them are generated by the ASBR.
What is LSA in OSPF?
The link-state advertisement (LSA) is a basic communication means of the OSPF routing protocol for the Internet Protocol (IP). It communicates the router’s local routing topology to all other local routers in the same OSPF area.
What is the LSDB in OSPF?
When OSPF basic topology is used, all the routers in the AS function as peers. Each router communicates routing information with each other one, and each maintains a copy of the key OSPF data structure: the link-state database (LSDB). The LSDB is essentially a computerized representation of the topology of the autonomous system.
What are different area types used in the OSPF?
What are the OSPF Area Types? Standart Area. This Area is the normal Area of OSPF. Backbone Area (Area 0) Backbone Area (Area 0) is the central of OSPF Network and all the other Areas are connected to thsese Backbone Area. Stub Area. Stub Area is the first specific Area. Totally Stubby Area. Totally Stubby Area is one step more strict Area than Stub Area.
What is opaque LSA in OSPF?
In OSPF extensions for MPLS traffic engineering, Opaque LSA’s are used to communicate traffic engineering interface parameters (such as maximum bandwidth, maximum reservable bandwidth, unreserved bandwidth, etc) throughout an area in order to populate the traffic engineering databases of the routers within the area.
What type of OSPF state?
Full state is the normal operating state of OSPF that indicates everything is functioning normally. In this state, routers are fully adjacent with each other and all the router and network Link State Advertisements ( LSAs) are exchanged and the routers’ databases are fully synchronized.