With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
rscnSwRscnReqTotalRejects
rscn Sw Rscn Req Total Rejects
1.3.6.1.4.1.9.9.292.1.2.3
The total number of SW_RSCN requests rejected across all VSANs by the local switch.
Back to CISCO-RSCN-MIB MIB page.
IPHost Network monitor allows you to monitor rscnSwRscnReqTotalRejects on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.