With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cIpForwardIfIndex
Cisco Ip Forward If Index
1.3.6.1.4.1.9.10.85.2.1.5
The ifIndex value which identifies the local interface through which the next hop of this route should be reached.
Back to CISCO-IETF-IP-FORWARD-MIB MIB page.
IPHost Network monitor allows you to monitor cIpForwardIfIndex on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.