Protocol Analysis, Data Recorder, CALEA, Lawful Intercept, Application Performance, User Experience, Industrial Ethernet, Data Loss Prevention, Deep Packet Inspection, NetFlow, SOX, HIPAA and PCI Compliance, Switching and Routing, Forensics, VoIP, IPTV ... etc.
Cisco AP + POE + CDP = Possible Problems (by Tony Fortunato)
I ran into a problem when I connected my Cisco 1240 to my Cisco 2940 and got an injector error.
I did a bit of research and found out that this error is common and a bit misleading. The error seems to be a result of when the AP receives a CDP packet from the switch and misinterpets the CDP information.
In this video I review what I saw and how I resolved it.