With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
appnNodeEnNnServer
appn Node End Network Node Server
1.3.6.1.2.1.34.4.1.1.3.2
The fully qualified name of the current NN server for this end node. An NN server is identified using the format specified in the SnaControlPointName textual convention. The value is a zero-length string when there is no active NN server. A branch network node shall also implement this object.
Back to APPN-MIB MIB page.
IPHost Network monitor allows you to monitor appnNodeEnNnServer 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.