I am planning the migration of a Network 172.16.0.0 Mask 255.255.0.0 to a VLSM VLANS so that I get the following topology:
A New range VLSM Subnet of 172.16.0.0/19 for the Actual range of IPs 172.16.0.0 to 172.16.31.254
Many Subnets of VLSM CIDR 22 beginning on 172.16.32.0 Mask 255.255.252.0
So 172.16.36.0, 172.16.40.0 etc.
Question: It is feasible to have the old network 172.16.0.0 Mask 255.255.0.0 mix with the new Subnets actives 172.16.32.0 Mask 255.255.252.0. at the same time for migration, routing between network and theirs selbst subnetworks ?
I am not sure if is possible to route between the network and the subnetworks of the same network....
Is there a conflict on configuration, organized I avoid having the same ip being defined two times so, as you can see the old range is up to 172.16.31.254 so no host ip is in conflict, but the range of the network is going to be overlapped with the new subnet mask.
PS.: I can not change the Mask of all Servers at the same time...
thanks in advance for a response
Roberto