thinQmaster Virtual testing partner Adaptive practice exams that find your weak spots and drill them. Every answer explained. From $69
Enroll

thinQmaster

Find your exam

Five questions free, before you decide.

Step 1 · choose a vendor

In one of our camps? Your practice exams come with the tuition — they are on your study page already.

Routing & Switching · Intermediate

OSPF Type 1 Router LSA

The LSA every OSPF router originates in each area, describing its links, costs and neighbors; flooded within the area only.

Definition

The Router LSA's link-state ID is the originating router ID. It lists point-to-point links, transit network connections to DRs, stub networks and virtual links, along with flags indicating ABR (B bit), ASBR (E bit) and virtual link endpoint (V bit).

Example

show ip ospf database router

Exam tip

Type 1 and Type 2 LSAs never leave their area; ABRs turn them into Type 3 summaries.

Related terms