I need a bit of advise about IP management for a new small office.
Our company is expanding to a new building, and we are rebuilding our networking from ground up. The new building is 5 floors high, and the expected number of PCs are about 30 on Floor 2, and 15 on all other floors. The company also expects wireless access available throughout all 5 floors.
My current train of thought:
- I am hoping to be able to separate the IP subnet per floor. 192.168.y.x where y = floor, and x = final bit for IP (example: 192.168.1.100 for a PC in floor 1, and 192.168.2.100 for PC in floor 2, etc).
- Having distinct separation between LAN, WiFi, and servers/network device IP addresses for easier management and future troubleshooting. Current thought: 192.168.y.2-30 for servers/network devices (eg. Printers) , 192.168.y.51-90 for WiFi connected devices, 192.168.y.101-255 for LAN connected devices (eg. PCs / Laptops)
So I guess my question is how am I going to achieve this?
I need a confirmation whether I'm heading to the right path, or I'm doomed on the wrong path.
My attempt to answer my own thoughts:
For Train of Thought 2:
Can be done by having DHCP Reservation or DHCP Static Lease - which will lease the same IP to the same device based on MAC Address. So I will have the MAC address for all the network devices (network printer, WiFi Access Points for now), and have their MAC address with DHCP reserved IP so they will always get the same IP and since they are reserved, there will be no IP collision on the network. PCs and Laptops can just get whatever IP they want.
For Train of Thought 1:
I have done reading on VLAN and Subnet and I believe the answer lies in creating single VLAN per floor, and each VLAN will have its own subset of IP like below:
VLAN10 - Floor 1 - 192.168.1.x/24
VLAN20 - Floor 2 - 192.168.2.x/24
VLAN50 - Floor 5 - 192.168.5.x/24
This is the network set up that I was thinking of
Where UMS = Unmanaged Switch. MS = Managed Switch. WAP = Wireless Access Point.
Now unfortunately I do have more questions after this:
- For MS2, can we simply create VLAN on the managed switch (eg. Cisco SG300-52) and will the DHCP Server somehow can be configured to understand VLAN tags and assign IP accordingly?
- VLAN creates somewhat isolated network between each VLAN (each VLAN don't really talk to each other), but the managed switch CAN be configured so each VLAN can talk to each other? (promiscuous mode on all VLAN?)
- Am I completely lost and gone off to the wrong track and need a good slap on the head and a full retraining?
- Or am I adding over complexity without achieving anything remotely useful in this small office environment and I should not attempt what I have in mind for now?
Any advice, guidance, or even hints are greatly appreciated. Thank you in advance for reading.