OSPF Point-to-Point

OSPF point-to-point

This next example includes a change that is disruptive to the network, while downtime is unavoidable. Should the operator make an error on either end or perform the change in the wrong order, they can leave the network offline until somebody visits the remote device with a console cable and restores connectivity. This is avoided with automation.

The example involves interface configurations for OSPF. There are two building distribution switches connected to the core through layer 3 port-channels. Each side of the link is logically a single interface, so this should be connected as an OSPF point-to-point connection. This is not the default configuration for layer 3 port-channels, and must be configured explicitly on the interface. The default is a broadcast type for OSPF. While broadcast will still work and connectivity will be established, there are some worthwhile advantages to following best practices. ...