Routing
network <ip> <wildcard> area <id>
Enable OSPF on every interface whose IP matches. Wildcard = inverted mask.
Works on: RouterMode: router
Example
R1(config-router)# network 10.0.0.0 0.0.0.255 area 0Watch out
Backbone area is 0. All other areas must connect to area 0.
Run this command live
Don't just read it — type network <ip> <wildcard> area <id> in a real network simulator in your browser and watch it take effect. No install, no account needed to start.
Frequently asked
What does the "network <ip> <wildcard> area <id>" command do?
Enable OSPF on every interface whose IP matches. Wildcard = inverted mask.
What's the common gotcha with "network <ip> <wildcard> area <id>"?
Backbone area is 0. All other areas must connect to area 0.
Example of "network <ip> <wildcard> area <id>"
R1(config-router)# network 10.0.0.0 0.0.0.255 area 0