With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
pagpEthcOperationMode
pagp Ethc Operation Mode
1.3.6.1.4.1.9.9.98.1.1.1.1.1
The managed device will refuse a request to set pagpEthcOperationMode to the pagpOn(3) state if the device does not implement the PAgP protocol. The managed device will refuse to set pagpEthcOperationMode to manual(2) or pagpOn(3) if the values in the interface's pagpAdminGroupCapability variable is inconsistent with other interfaces' pagpAdminGroupCapability values.
Back to CISCO-PAGP-MIB MIB page.
IPHost Network monitor allows you to monitor pagpEthcOperationMode 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.