With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cXgcpStatsNackTxMsgs
Cisco Xgcp Stats Nack Tx Msgs
1.3.6.1.4.1.9.9.318.1.3.2.1.9
Number of negative acknowledgment messages sent by the MG.
Back to CISCO-XGCP-MIB MIB page.
IPHost Network monitor allows you to monitor cXgcpStatsNackTxMsgs 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.