With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cipCardStatsHiWaterLlc2Sessions
Channel Interface Processor Card Statistics high Water Llc2 Sessions
1.3.6.1.4.1.9.9.33.1.2.3.1.1
High water LLC2 sessions count per CMCC card. If cipCardOperMaxLlc2Sessions is zero (0), then this value starts at 256 Llc2 sessions and will be incremented in values of 64 as more active concurrent LLC2 sessions are established. If cipCardOperMaxLlc2Sessions is greater then zero (0), then this value will either be equal to the cipCardOperMaxLlc2Sessions given enough memory is available on the CMCC card to support that many LLC2 sessions or the the value will be less than cipCardOperMaxLlc2Sessions, reflecting the maximum number of LLC2 sessions the CMCC card can support.
Back to CISCO-CIPCSNA-MIB MIB page.
IPHost Network monitor allows you to monitor cipCardStatsHiWaterLlc2Sessions on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.