Ospf Backbone Router

[jonk34567]

what is ospf Backbone Router ? 

[acampbell]

Hi,

Have a look through this:-

https://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/7039-1.html

[Julio E. Moisa]

Hi

The area 0 is also known as the Backbone, so a backbone router is a router into the area 0 who is used to interconnect the network or also considered as the main router. 

[Predrag Jovic · Accepted solution]

Backbone area = Area 0.

Backbone router is a router that has an interface assigned to area 0. More specific - all ABRs and all internal routers (routers that have all interfaces in area 0) connected to area 0 are considered backbone routers.