Cisco Systems 3750E Adding a Metric Offset to the Dvmrp Route, Ip dvmrp metric-offset in out

Chapter 42 Configuring IP Multicast Routing

Configuring Advanced DVMRP Interoperability Features

	Command	Purpose
Step 5
	show running-config	Verify your entries.
Step 6
	copy running-config startup-config	(Optional) Save your entries in the configuration file.

To re-enable auto summarization, use the ip dvmrp auto-summaryinterface configuration command.

Adding a Metric Offset to the DVMRP Route

By default, the switch increments by one the metric (hop count) of a DVMRP route advertised in incoming DVMRP reports. You can change the metric if you want to favor or not favor a certain route.

For example, a route is learned by multilayer switch A, and the same route is learned by multilayer switch B with a higher metric. If you want to use the path through switch B because it is a faster path, you can apply a metric offset to the route learned by switch A to make it larger than the metric learned by switch B, and you can choose the path through switch B.

Beginning in privileged EXEC mode, follow these steps to change the default metric. This procedure is optional.

	Command	Purpose
Step 1
	configure terminal	Enter global configuration mode.
Step 2
	interface interface-id	Specify the interface to be configured, and enter interface configuration
		mode.
Step 3
	ip dvmrp metric-offset [in out]	Change the metric added to DVMRP routes advertised in incoming
	increment	reports.
		The keywords have these meanings:
		• (Optional) in—Specifies that the increment value is added to
		incoming DVMRP reports and is reported in mrinfo replies.
		• (Optional) out—Specifies that the increment value is added to
		outgoing DVMRP reports for routes from the DVMRP routing
		table.
		If neither in nor out is specified, in is the default.
		For increment, specify the value that is added to the metric of a DVMRP
		router advertised in a report message. The range is 1 to 31.
		If the ip dvmrp metric-offsetcommand is not configured on an
		interface, the default increment value for incoming routes is 1, and the
		default for outgoing routes is 0.
Step 4
	end	Return to privileged EXEC mode.
Step 5
	show running-config	Verify your entries.
Step 6
	copy running-config startup-config	(Optional) Save your entries in the configuration file.

To return to the default setting, use the no ip dvmrp metric-offsetinterface configuration command.

	Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-02		42-51