I'm in charge of the network at a new small office. I could use some advice for the most sensible topology, for security and cost, and what hardware to invest in.
I have an empty rack, ethernet cabling already run, and our managed router from our ISP, a SMCD3GN2. We're operating just fine at the moment with our laptops, but will need more eventually:
Guest wifi network (~20 clients peak)
Private wifi network (~15 clients)
10 desktop workstations
3 process side computers (internet connected for remote support via VPN+VNC)
2 cash registers
6 security cameras.
Services: SMB, DVR for 6 FHD (1920x1080) IP cameras, warehouse management software
Here's my plan so far:
SMCD3GN2: Provide guest wifi network, Switch 1 and server plugged in
Switch 1: (Netgear JGS524?) 10 desktops, printer, AP for private wifi network
Server: (Dell Poweredge?) run SMB, backups, DVR, PBX (maybe), firewall for switch 2
Switch 2: (D-Link DSS-16+?) cash registers, security cameras, process side computers
I'd like to run free software as much as possible, that means CentOS, zoneminder for the cameras, etc.
1. Does it make sense to have the DVR run on the same physical machine as the other services? Does disk I/O with 6 FHD cameras get very high?
2. What switches do you recommend? I have never worked with VLANs... do I need them to properly separate the cash register, security camera, and process computer networks?
3. Will our SMCD3GN2 be up to the task, and what AP should I consider to run the private network?
4. Any criticism, constructive or otherwise?