With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cswitchUsageStatEntry
cswitch Usage Stat Entry
1.3.6.1.4.1.9.9.201.1.1.1.1
Entry contains information of a particular interface in terms of how much switch resource it has used. An entry in this table exists for each ifEntry with an ifType of fastEther(62) for FastEthernet interface and gigabitEthernet (117) for Gigabit interface.
Back to CISCO-SWITCH-USAGE-MIB MIB page.
IPHost Network monitor allows you to monitor cswitchUsageStatEntry 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.