While performing hard cut-over from the existing switches to the new switches, What would be multipathing software behaviour?

Multipathing software being Powerpath, Veritas DMP and HP PVlinks.

Since PVlinks has fcid in the device path, presumption is server needs to be offline and rediscover the disk.

For the other two(Power path and Veritas DMP), Does it require rescan?

During the cut-over process, is it going to create any dead paths?

Let me know your experiences.