With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cwrPctEffectivePhyDataRate
Cisco Wireless Pct Effective Phy Data Rate
1.3.6.1.4.1.9.9.136.1.6.2.1.16
This object represents the ratio of total error free codewords received to the total codewords received as a percentage.
Back to CISCO-WIRELESS-IF-MIB MIB page.
IPHost Network monitor allows you to monitor cwrPctEffectivePhyDataRate 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.