With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
rprSpanDayOutMcastClassAOctets
rpr Span Day Out Mcast Class A Octets
1.0.8802.17.1.1.1.3.3.1.28
The number of transmitted (MAC to PHY) classA multicast and broadcast octets.
Back to IEEE-802DOT17-RPR-MIB MIB page.
IPHost Network monitor allows you to monitor rprSpanDayOutMcastClassAOctets on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.