A static route configured by an administrator can give absolute control on determining where packets are routed. In comparison to dynamic routing protocols it can be a large administrative overheard for the network engineer when modifying or updating the routes on multiple routers.
A static route configured on a router does not require any bandwidth, as the routes are configured on the local router and are not transmitted elsewhere.
Due to the static route only being local to the router, any links going down does not result in any peers being updated with new routes.
Static routes are only useful when:
- Dynamic routes cannot be used due to it not being supported, limited memory, or CPU power.
- Routes that are learned through a dynamic routing protocol need to be overridden.