Area Types - Dell Force10 S4810P Configuration Manual

High-density, 1ru 48-port 10gbe switch

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Autonomous System Areas

Figure 34-1.

Area Types

of the network is Area 0. It is also called Area 0.0.0.0 and is the core of any Autonomous

System (AS). All other areas must connect to Area 0.

backbone is not contiguous. In this case, backbone connectivity must be restored through virtual

links. Virtual links are configured between any backbone routers that share a link to a

non-backbone area and function as if they were direct links.

An OSPF backbone is responsible for distributing routing information between areas. It consists of all

Area Border Routers, networks not wholly contained in any area, and their attached routers.

The Backbone is the only area with a default area number. All other areas can have their Area ID assigned

in the configuration.

shows Routers A, B, C, G, H, and I are the Backbone.

Areas can be defined in such a way that the

Open Shortest Path First (OSPFv2 and OSPFv3) | 723