With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cInetNetToMediaEntry
Cisco Inet Net To Media Entry
1.3.6.1.4.1.9.10.86.1.1.3.1
Each entry contains one IP address to `physical' address equivalence.
Back to CISCO-IETF-IP-MIB MIB page.
IPHost Network monitor allows you to monitor cInetNetToMediaEntry 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.