With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ciscoIfExtensionTablePacketGroup
cisco If Extension Table Packet Group
1.3.6.1.4.1.9.9.276.2.2.1
A collection of objects containing packet statistics for a given interface.
Back to CISCO-IF-EXTENSION-MIB MIB page.
IPHost Network monitor allows you to monitor ciscoIfExtensionTablePacketGroup 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.