With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cvIfCountOutPacketsNotBroadcastToSource
Cisco Voice If Count Out Packets Not Broadcast To Source
1.3.6.1.4.1.9.9.17.1.4.3.1.7
VINES protocol output broadcast not sent because interface leads back to the source.
Back to CISCO-VINES-MIB MIB page.
IPHost Network monitor allows you to monitor cvIfCountOutPacketsNotBroadcastToSource 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.