With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
leArpMacAddress
le Arp Mac Address
1.3.6.1.4.1.353.5.3.1.1.9.1.1
The MAC address for which this cache entry provides a translation. Since ATM LAN Emulation uses an ARP protocol to locate the Broadcast and Unknown Server, the value of this object could be the broadcast MAC address. MAC addresses should be unique within any given ATM Emulated LAN. However, there's no requirement that they be unique across disjoint emulated LANs.
Back to LAN-EMULATION-CLIENT-MIB MIB page.
IPHost Network monitor allows you to monitor leArpMacAddress on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.
