With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cseL3SwitchedTotalOctets
CISCO SWITCH ENGINE L3 Switched Total Octets
1.3.6.1.4.1.9.9.97.1.4.1.1.2
Number of octets in the total packets switched at Layer 3 by this switching engine.
Back to CISCO-SWITCH-ENGINE-MIB MIB page.
IPHost Network monitor allows you to monitor cseL3SwitchedTotalOctets 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.