Has anyone performed a 7.2.4 upgrade to 8.0.4 with zero downtime? Here is the recommended upgrade paths from cisco about a major upgrade.
You can upgrade from the last minor release of the previous version to the next major release.
For example, you can upgrade from 7.9 to 8.0, assuming that 7.9 is the last minor version in the 7.x release.
Talking with Cisco Tech they said the upgrade could not be done using the zero downtime. Just wanted to check on others experiences with this upgrade.