Added notes on disabled networks still adds Area Range config to OSPF.
Added Area Range purpose in a simplistic manner (http://docs.frrouting.org/en/latest/ospfd.html#clicmd-area-0-4294967295-range-A.B.C.D-M-advertise-cost-0-16777215)
Added notes on interfaces for route advertisement with a configured area as an alternative to networks configuration.
Also a small note that interface configuration reduces Firewall Filter Rules has an alternative to networks.
Added notes on disabled networks still adds Area Range config to OSPF. Added Area Range purpose in a simplistic manner (http://docs.frrouting.org/en/latest/ospfd.html#clicmd-area-0-4294967295-range-A.B.C.D-M-advertise-cost-0-16777215) Added notes on interfaces for route advertisement with a configured area as an alternative to networks configuration. Also a small note that interface configuration reduces Firewall Filter Rules has an alternative to networks.