In OSPF configuration mode, an engineer would use the no network network-id and area area-idsubcommands to remove the network commands.
Information About OSPF:
OSPF is an Interior Gateway Protocol (IGP) designed specifically for IP networks, and it supports IP subnetting as well as tagging of externally derived routing information.
OSPF also supports packet authentication and sends and receives packets using IP multicast. RFC 1253 and the OSPF management information base are supported by the Cisco implementation.
The Cisco implementation adheres to the OSPF Version 2 specifications by including the following key features:
Definition of stub areas is supported.
Routes learned through one IP routing protocol can be redistributed into another. This means that OSPF can import routes learned through EIGRP and RIP at the intradomain level. Routes from OSPF can also be exported to RIP.
Plain text and MD5 authentication are supported between neighboring routers within an area.
Interface output cost, retransmission interval, interface transmit delay, router priority, router dead and hello intervals, and authentication key are all configurable routing interface parameters.
Virtual links are supported.
Not-so-stubby-areas (NSSAs) per RFC 1587are supported.
