Cisco Systems 78-11741-02 manual Using IP Multicast Heartbeat, IPC-447

Configuring IP Multicast Routing

Monitoring and Maintaining IP Multicast Routing Configuration Task List

Command	Purpose
Router# show ip pim neighbor [type number]	Lists the PIM neighbors discovered by the router.
Router# show ip pim rp [mapping metric] [rp-address]	Displays the RP routers associated with a sparse mode
	multicast group.
Router# show ip pim vc [group-address name] [type	Displays ATM VC status information for multipoint VCs
number]	opened by PIM.
Router# show ip rpf {source-address source-name}	Displays how the router is doing RPF (that is, from the
[metric]	unicast routing table, DVMRP routing table, or static
	mroutes). Also displays the unicast routing metric.
Router# show ip rtp header-compression [type number]	Displays RTP header compression statistics.
[detail]
Router# show ip sap [group “session-name” detail]	Displays the SAP cache.

Using IP Multicast Heartbeat

The IP multicast heartbeat feature enables you to monitor the delivery of IP multicast packets and to be alerted if the delivery fails to meet certain parameters.

Although you can also use MRM to monitor IP multicast, you can perform the following tasks with IP multicast heartbeat that you cannot do with MRM:

•Generate an SNMP trap

•Monitor a production multicast stream

When IP multicast heartbeat is enabled, the router monitors IP multicast packets destined for a particular multicast group at a particular interval. If the number of packets observed is less than a configured minimum amount, the router sends an Simple Network Management Protocol (SNMP) trap to a specified network management station to indicate a loss of heartbeat exception.

To configure IP multicast heartbeat, use the following commands in global configuration mode:

	Command	Purpose
Step 1
	Router(config)# ip multicast-routing	Enables IP multicast routing.
Step 2
	Router(config)# snmp-server host host traps	Specifies the recipient of an SNMP notification operation.
	community-string
Step 3
	Router(config)# snmp-server enable traps	Enables the router to send IP multicast traps.
	ipmulticast
Step 4
	Router(config)# ip multicast heartbeat	Enables the monitoring of the IP multicast packet delivery.
	group-address minimum-number window-size
	interval

See the “IP Multicast Heartbeat Example” section later in this chapter for an example of how to configure IP multicast heartbeat.

For more information on the information contained in IP multicast SNMP notifications, refer to the Cisco IOS Configuration Fundamentals Command Reference.

Cisco IOS IP Configuration Guide

IPC-447