Okay, so I konw there are a gazillion "how to change DHCP scope" questions but I just want to confirm the network affects of creating new scope that replaces an existing one.
So here is what i understand. In order to extend my DHCP range i have delete the existing scope and create a new scope with same IP range (different subnet mask)
1. Delete the old scope with subnet mask 255.255.255.0
2. Create a new scope with subnet mask 255.255.254.0
So how long does it take the network to "recover" from this change?
In the mean time does the network stop working?
the network has to be working by Monday AM