With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cseL3VlanOutOctets
CISCO SWITCH ENGINE L3 Vlan Out Octets
1.3.6.1.4.1.9.9.97.1.4.2.1.5
Number of octets in packets Layer-3 forwarded to this Vlan by this switching engine.
Back to CISCO-SWITCH-ENGINE-MIB MIB page.
IPHost Network monitor allows you to monitor cseL3VlanOutOctets on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.