Howto upgrade your stackable 3750 with limited service disruption
When you have two or more 3750 in a Stack Configuration and need to upgrade the image, you will have a long service disruption (it can take about 7 – 10 minutes, because – depending on the image – the bootloader will be upgraded too and POST tests also take their time). However, if you have a redundant configuration, you can limit the downtime to a few seconds.
