Wireless PLCP CRC Errors
The Physical Layer Convergence Protocol (PLCP) includes a Cyclical Redundancy Check (CRC). This column shows the number of packets that failed the PLCP CRC Check.
Wireless low average signal strength and Wireless low average signal quality can cause CRC errors.
If you have eliminated these as the culprits (which is easy to do by looking at the Wireless Vital Signs display), an overloaded network can also cause collisions which result in CRC errors.