I have a subnet that will be running out of ip addresses soon, because we are merging floors. I have read some post in here that state resubnetting is not a good idea, because of going over the 250-300 ip addresses per subnet create network latency (there are approx. 100-110 users, but it is ip phone and computer). Anywho here is my situation.... My subnet is 172.22.8.x/24. I have a core switch that has a few vlan's on it with subnets of there own; 172.22.5.x, 172.22.12.x, 172.22.24.x...etc all /24. If I resubnet the .8 network to a /23 will I have to change any of the other default gateways or just this one since they are all separate vlans? Also, if I choose to add another subnet to the .8 subnet will that affect any of the others. I assume I would have to delete and start a new one regarless of the way I proceed. Any suggestions as to the better method?
In addition to, I have other switches in the environment, would they need to be changed?