With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
etherStatsHighCapacityPkts64Octets
ether Stats High Capacity Pkts64 Octets
1.3.6.1.2.1.16.1.7.1.6
The total number of packets (including bad packets) received that were 64 octets in length (excluding framing bits but including FCS octets).
Back to HC-RMON-MIB MIB page.
IPHost Network monitor allows you to monitor etherStatsHighCapacityPkts64Octets on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.