With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
fcNameServerTotalRejects
fc Name Server Total Rejects
1.3.6.1.4.1.9.9.293.1.2.1
The total number of requests rejected by the local switch across all VSANs.
Back to CISCO-NS-MIB MIB page.
IPHost Network monitor allows you to monitor fcNameServerTotalRejects 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.