With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
rscnScrTable
rscn Scr Table
1.3.6.1.4.1.9.9.292.1.1.2
A table of Nx_Ports that have registered to receive RSCNs on all VSANs configured on the local switch.
Back to CISCO-RSCN-MIB MIB page.
IPHost Network monitor allows you to monitor rscnScrTable on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.