OSPF utilizes four distinct kinds of switches with an extraordinary job and set of characterizing attributes inside the progressive system. The switches control the traffic that goes all through regions. The OSPF switches are arranged in light of the capacity they act in the steering area. The four sorts of switches are following:-

  • Inside switch All points of interaction of interior switches (IRs) are straightforwardly associated with a similar region. An inward switch has a solitary connection state information base since they have a place with just a single region.
  • Spine switch This is a switch in the spine (region 0). The points of interaction of the spine switches are associated with the spine region. The spine switches don’t have a point of interaction associated with the other OSPF regions, since, supposing that they associated with different regions, they would be viewed as Area Border Router (ABRs).
  • Region Border Router(ABR) – Routers put on the boundary of at least one OSPF regions and that interface those regions to the spine network are known as ABRs. The ABRs are viewed as the individuals from both the OSPF spine and the connected regions. It assembles geography data from their associated regions and offers it to the spine region. The ABR keep up with isolated LSDBs for every area it is associated with. It summed up the LSDBs and afterward introduced to the spine for conveyance to different regions.
  • Independent System Boundary Router (ASBR)- The Autonomous System Boundary Router (ASBR) has something like one point of interaction associated with an outer internetwork, for instance, a non-OSPF organization. ASBRs run both OSPF and another directing convention, like RIP. ASBRs should live in a non-stub OSPF region.

The rearrangement order is accustomed to unite two steering conventions while utilizing Cisco switches. BGP likewise support numerous independent frameworks together. In the event that a switch associates with region 0 and region 1, and also, keeps up with steering data for another, non-OSPF organization, it falls under three distinct arrangements: a spine switch, an ABR, and an ASBR.