Dynamic Authorization Failed. Cisco WLC.

Dynamic Authorization is the official name for Change of Authorization(CoA). Cisco TAC personnel have said that it`s very common for them to receive customer calls stating that they are receiving many Dynamic Authorization Failed errors in the Live Log. Also that 99 percent of the time, the issue is a misconfiguration of the NAD.

WS-X45-SUP6L-E // 15.0(2)SG2 // High CPU load

High CPU usage was occurring when the switch was upgraded from 15.0(2)SG2 to 15.2(2)E4. After exhaustive troubleshooting, it was found that the problem was significant with mac moving. After reviewing the STP instances for VLAN, nothing existed. It was later found that the following statements were configured in the switch all the time. no spanning-tree […]