The OSPF network Command

Although OSPF has been turned on, it has no information on how to operate. The networks that are to participate in the OSPF updates, and the area that they reside in, must be defined. If the following information is not specified, the process will have nothing to do and will die:

network network number wildcard mask area area number

This command deserves a moment's explanation because it is the cause of many errors in configuration.

The network command in OSPF plays a similar role to that of the network command in RIP or IGRP. The difference is the level of granularity afforded to the administrator. In RIP and IGRP, the network command is defined at the class level. In OSPF, it is possible to identify the specific address of an interface.

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