With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
csbHistoryStatsSrtpDisallowedFailures
Cisco Session Border History Stats Srtp Disallowed Failures
1.3.6.1.4.1.9.9.657.1.4.1.35
This object indicates the total call setup failures due to SRTP being proposed when not permitted during this interval.
Back to CISCO-SESS-BORDER-CTRLR-CALL-STATS-MIB MIB page.
IPHost Network monitor allows you to monitor csbHistoryStatsSrtpDisallowedFailures on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.