With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ccMemberNumber
Cisco Cluster Member Number
1.3.6.1.4.1.9.9.134.1.2.1.1.2
An arbitrary value which uniquely identifies the cluster member switch number. It ranges from 1 to ccStatusMaxNumberOfMembers.
Back to CISCO-CLUSTER-MIB MIB page.
IPHost Network monitor allows you to monitor ccMemberNumber on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.