With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cD11HtPhyXmitExpCSIFdbkASImplemented
Cisco DOT11 High-Throughput Physical Xmit Exp CSI Fdbk AS Implemented
1.3.6.1.4.1.9.9.607.1.1.1.1.5
This object, when 'true', indicates that transmit Antenna Selection based on explicit CSI feedback is supported on this 802.11n interface.
Back to CISCO-DOT11-HT-PHY-MIB MIB page.
IPHost Network monitor allows you to monitor cD11HtPhyXmitExpCSIFdbkASImplemented on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.