With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
fcNameServerRejReasonCodeExp
fc Name Server Rej Reason Code Exp
1.3.6.1.4.1.9.9.293.1.3.2
The registration reject reason code explanation. This object contains the reason code explanation if the above object has a reason code corresponding to 'Unable to perform command request'. This object like the one above, corresponds to the most recent Name Server Registration request rejection.
Back to CISCO-NS-MIB MIB page.
IPHost Network monitor allows you to monitor fcNameServerRejReasonCodeExp on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.