Cisco Systems 3750E Configuring Static Unicast Routes, Router bgp rip ospf eigrp, Show ip route

Chapter 38 Configuring IP Unicast Routing

Configuring Protocol-Independent Features

Even though the router automatically learns about and configures equal-cost routes, you can control the maximum number of parallel paths supported by an IP routing protocol in its routing table. Although the switch software allows a maximum of 32 equal-cost routes, the switch hardware will never use more than 16 paths per route.

Beginning in privileged EXEC mode, follow these steps to change the maximum number of parallel paths installed in a routing table from the default:

	Command	Purpose
Step 1
	configure terminal	Enter global configuration mode.
Step 2 router {bgp rip ospf eigrp}		Enter router configuration mode.
Step 3
	maximum-paths maximum	Set the maximum number of parallel paths for the protocol routing
		table. The range is from 1 to 16; the default is 4 for most IP routing
		protocols, but only 1 for BGP.
Step 4
	end	Return to privileged EXEC mode.
Step 5
	show ip protocols	Verify the setting in the Maximum path field.
Step 6
	copy running-config startup-config	(Optional) Save your entries in the configuration file.

Use the no maximum-pathsrouter configuration command to restore the default value.

Configuring Static Unicast Routes

Static unicast routes are user-defined routes that cause packets moving between a source and a destination to take a specified path. Static routes can be important if the router cannot build a route to a particular destination and are useful for specifying a gateway of last resort to which all unroutable packets are sent.

Beginning in privileged EXEC mode, follow these steps to configure a static route:

	Command	Purpose
Step 1
	configure terminal	Enter global configuration mode.
Step 2
	ip route prefix mask {address interface} [distance]	Establish a static route.
Step 3
	end	Return to privileged EXEC mode.
Step 4
	show ip route	Display the current state of the routing table to verify
		the configuration.
Step 5
	copy running-config startup-config	(Optional) Save your entries in the configuration file.

Use the no ip route prefix mask {address interface} global configuration command to remove a static route.

The switch retains static routes until you remove them. However, you can override static routes with dynamic routing information by assigning administrative distance values. Each dynamic routing protocol has a default administrative distance, as listed in Table 38-14. If you want a static route to be overridden by information from a dynamic routing protocol, set the administrative distance of the static route higher than that of the dynamic protocol.

	Catalyst 3750-E and 3560-E Switch Software Configuration Guide
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