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What is the difference between OSPF and OSPFv3?
OSPFv2 stands for Open Shortest Path First version 2 and OSPFv3 stands for Open Shortest Path First version 3. OSPFv2 is the IPv4’s OSPF version, whereas OSPFv3 is the IPv6’s OSPF version. In OSPFv2, many OSPF instances per interface are not supported, whereas in OSPFv3, many OSPF instances per interface are supported.
What are areas in OSPF?
There are five types of OSPF areas: Backbone area (area 0), Standard area, Stub area, Totally stubby area, and No so stubby area (NSSA). Let’s introduce one by one. Backbone area, also called the backbone area, is actually area 0.
How many areas are in OSPF?
These connecting routing devices are called (ABRs). Figure 1 shows an OSPF topology of three areas connected by two ABRs. Because all areas are adjacent to the backbone area, OSPF routers send all traffic not destined for their own area through the backbone area.
Why does OSPF need area?
OSPF uses areas to simplify administration and optimize traffic and resource utilization. An area is simply a logical grouping of contiguous networks and routers. All routers in the same area have the same topology table and don’t know about routers in the other areas. the routing tables on the routers are reduced.
What is the OSPF boundary between two areas?
A router with interfaces in two (or more) different areas is an area border router. An area border router is in the OSPF boundary between two areas. Both sides of any link always belong to the same OSPF area.
Is the OSPF interface the same as OSPFv3?
OSPFv3 also supports the same interface types, including broadcast, point-to-point, point-to-multipoint, NBMA, and virtual links. LSAs are still flooded throughout an OSPF domain, and many of the LSA types are the same, though a few have been renamed or newly created.
How are OSPF networks divided into sub-domains?
An OSPF network can be divided into sub-domains called areas. An area is a logical collection of OSPF networks, routers, and links that have the same area identification. A router within an area must maintain a topological database for the area to which it belongs. The router does not have detailed information about network topology outside
How are OSPF areas and virtual links created?
In this example, the virtual link is created between the routers with router ID 1.1.1.1 and router ID 2.2.2.2. In order to create the virtual link, configure the area 5 virtual-link 2.2.2.2 subcommand on router 1.1.1.1 and the area 5 virtual-link 1.1.1.1 subcommand on router 2.2.2.2.