With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
caqIfTrustDevice
Cisco Access Control List QoS If Trust Device
1.3.6.1.4.1.9.9.179.1.2.1.1.4
For a given physical interface, this object indicates the restriction on trusting only a specific type of device which is connected to this interface to carry the correct data for classification. trustCiscoIPPhone(0) indicates that there is a restriction on trusting only ciscoIPPhone to carry the correct data for classification. If there is no bits turned on, any device connected to this interface is trusted to carry the correct data for clarification. This object is only instantiated if the platform supports trust device configuration.
Back to CISCO-CATOS-ACL-QOS-MIB MIB page.
IPHost Network monitor allows you to monitor caqIfTrustDevice 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.