So the network that I help support is still believe it or not running 802.1d traditional pvst+ mode. I've proposed migrating the enterprise to rapid mode and will begin some scenario testing soon. I've used the cisco feature navigator to verify that the code each switch platform is running will support rapid-pvst. Devices which for whatever reason do not support rapid mode will be left alone until they are replaced (which will be this year anyway).
My question is, on a network of roughly 7,000 switches, how can i minimize the number of switches that freak out and block all ports. I've thought about scripting a delayed reload in the event a switch drops off the network, but given the scope that seems like a bad idea to me. Also, on sites with large l2 domains, is it recommended to work from the core out, or vice versa?