proc ModifyIgmpReportsPerSecond { portList rate } {
    # Description:
    #    This API will automatically disable or enable
    #    suppress ARP for duplicate gateway on all the 
    #    ports with ipv4.

    # action = true or false or enable or disable

    set root [ixNet getRoot]
    set globals $root\globals
    set globalTopology $globals/topology
    set globalTopologyIgmpHost $globalTopology/igmpHost
        
    set multiValue [ixNet getAttribute $globalTopologyIgmpHost -ratePerInterval]	
    set igmpHostPortList [ixNet getAttribute $globalTopologyIgmpHost -rowNames]

    foreach port $portList {
	set portIndex [expr [lsearch $igmpHostPortList $port] + 1]
	if {$portIndex == -1} {
	    puts "\nError ModifyIgmpReportPerSecond: No such port found for igmpHost: $port"
	    return 1
	}

	puts "\nModifyIgmpReportsPerSecond: $port -> $rate"
	if {[SetNgpfCounterMultiValue $multiValue $portIndex $rate]} {
	    return 1
	}
    }
    return 0
}