With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cD11HtPhyEntry
Cisco DOT11 High-Throughput Physical Entry
1.3.6.1.4.1.9.9.607.1.1.2.1
Each entry represents a conceptual row in cD11HtPhyTable and corresponds to the support available for the various high-throughput capabilities on an 802.11n interface.
Back to CISCO-DOT11-HT-PHY-MIB MIB page.
IPHost Network monitor allows you to monitor cD11HtPhyEntry on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.
