OSPF Network LSA (Type 2 LSA)

Hello everyone and welcome to Network Playroom!

In this video, we're going to look at the OSPF LSA Type 2 or the network LSA in detail.

Network LSAs are originated by Designated Routers to represent the network segment. This implies that the network LSAs are originated for broadcast and NBMA networks because those are the OSPF network types that elect a Designated Router. The network LSAs advertise the multiaccess network and all routers (including the DR) attached to the network. Like the router LSA, the network LSA is flooded only within the originating area.

Link State ID for the network LSA is the IP address of the DR’s interface on the network segment.
Network Mask specifies the subnet mask used on this network.
Attached Router lists the router IDs of all routers on the network that are fully adjacent with the DR, and the DR itself.

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