I've noticed for some years now, that periodically, a cisco wireless pcmcia card will lose its association to a cisco ap with which it has strong signal. The association instantaneously comes right up, and this has never been of serious consequence, but now I have a customer that's implying that I've designed their network poorly, or the cisco hardware is defective. You never notice anything is wrong unless your looking at the cisco site survey utility when this happens (ie. it doesnt' seem to affect app performance).
Observing this with the site survey tool, the impression is that of a "blip", it occurs so quickly. When running a background continuous ping as this happens, no pings are dropped.
I have seen this on 4800, 340, and 350 series cards, across all fimware and drivers, and across every PC and operating system I've used for the last 4 years.
Anyone know what's causing this, and possibly how to make it go away? At the least, I need to reassure my customer, who is a household name.