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OSPF chooses the best route to reach a subnet based on the lowest cost among all possible routes. OSPF calculates the cost as the sum of the…
OSPF uses a router's Router ID (RID) to identify each router. We see the RID in many OSPF verification commands, so using predictable, known OSPF RID values…
The OSPF network type setting happens to be one of the more useful optional OSPF features. This setting changes a couple of details about how OSPF operates…
OSPF includes many optional features. Depending on the network, particularly the WAN, you may ignore some of those features while possibly using others. The choice to influence…
A router configuration can enable OSPF on an interface directly using the ip ospf interface subcommand. In fact, the configuration is more direct and obvious than the…
When using the OSPF network command, whether single area of multi-area, you have to be careful with the wildcard mask used and which interfaces each network command…
What if your #CCNA exam required you to configure the OSPF network command with a particular style of mask? What if it said “match all addresses in…
The OSPF network command can cause a bit of mental trouble for anyone just starting out. The reason: the first two parameters require us to do a…
It’s too easy – enabling OSPF per interface rather than using the old IOS network command. In some ways, we may not trust that it’s that easy.…
From the first days of OSPF in Cisco routers, OSPF configuration has included a network command. The network command enables OSPF on that router’s interfaces, but it…