Core Issue
There are various ways to configure a default gateway on a router. A default gateway is also known as a default route or gateway of last resort.
Resolution
To configure a default gateway on a Cisco router, issue these commands:
Routing protocols also differ in the way they propogate the default routes, depending on the routing protocol and how the default route is configured. For more information, refer to Configuring a gateway of Last resort using IP Commands.
