CCNA Routing and Switching Review Guide by Todd Lammle

Author:Todd Lammle
Language: eng
Format: epub
Publisher: Wiley
Published: 2013-12-11T16:00:00+00:00

Here is the command syntax you use to add a static route to a routing table from global config:

ip route [destination_network] [mask] [next-hop_address or exitinterface] [administrative_distance] [permanent] Router(config)#ip route 172.16.3.0 255.255.255.0 192.168.2.4

Another type of static route is known as a default route. A default route is used by IP to forward any packet with a destination not found in the routing table, which is why it is also called a gateway of last resort. Default routes are generally placed on stub networks (networks with only one way in or out of the router).

The command syntax you use to add a static route to a routing table from global config is as follows:

Router(config)#ip route 0.0.0.0 0.0.0.0 172.16.10.5

With dynamic routing, protocols are used to find networks and update routing tables on routers. This is a whole lot easier than using static or default routing, but it will cost you in terms of router CPU processing and bandwidth on network links. A routing protocol defines the set of rules used by a router when it communicates routing information between neighboring routers. Common routing protocols include RIP, EIGRP, and OSPF.

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