OSPF Commands | 427area stub This command creates a stub area for the specified area ID. A stub area is characterized by the fact thatAS External LSAs are not propagated into the area. Removing AS External LSAs and Summary LSAscan significantly reduce the link state database of routers within the stub area.The no version of this command deletes a stub area for the specified area ID.Syntax area areaid stubMode Router OSPF Configarea stub summarylsaThis command configures the Summary LSA mode for the stub area identified by areaid. TheSummary LSA mode is configured as enabled.The no version of this command configures the default Summary LSA mode for the stub areaidentified by areaid.Syntax [no] area areaidustubusummarylsaDefault disabledMode Router OSPF Configarea virtual-linkThis command creates the OSPF virtual interface for the specified areaid and neighbor. The neighborparameter is the Router ID of the neighbor.The no version of this command deletes the OSPF virtual interface from the given interface, identifiedby areaid and neighbor. The neighbor parameter is the Router ID of the neighbor.Syntax [no] area areaid virtual-link neighborMode Router OSPF Configarea virtual-link authenticationThis command configures the authentication type and key for the OSPF virtual interface identified byareaid and neighbor.Syntax area areaid virtual-link neighbor authentication {none | {simple key} | {encrypt key keyid}}The neighbor parameter is the Router ID of the neighbor.The authentication type is either none (the default), simple, or encrypt.
