I'm our Datacentre the number of servers is reaching the maximum available from the current network mask /24 and we would like to move to a larger mask, /22, without loosing service. At the moment we have 3 different vlans, service, management and storage, 1 FW, 2 4506 cisco switches and 12 3130x cisco switches.
What's the best way to proceed? create 3 new vlans with the new IPs?
Would you have case studies or examples you can send me?