[c-nsp] c3750x upgrade to 12.2(55)SE1 takes forever

[Nick Hilliard]

Just a heads-up for those planning to upgrade to 12.2(55)SE1 on the 3750X 
platform: this version includes both a bootloader upgrade and a hardware 
microcode upgrade.  I did a upgrade on a C3750X stack several days ago, 
which took fully 38 minutes of nail-scratching downtime before all stack 
members were back in service.

It doesn't mention the microcode upgrade in the release notes, nor give any 
hint that the upgrade will take a very long time indeed.  If there's anyone 
from Cisco listening: it would really help if this sort of thing was 
mentioned in the release notes - please!  Not everyone is in a position to 
lab-test their upgrades.

Nick