ISP modems, gateway boxes, most third party network devices default to a Class C IP address something like 192.168.000.000/16.

See Private IP Network

I want to separate my work traffic from my home traffic
using a Class B IP address something like 172.16.000.000/12.
Clearly my access points and router boxes will use Class-B configuration
for all of my work things.

Can someone help me sort out Route Table Entries or other
LAN configuration details so that this works reasonably well?

Some issues that I have no idea how to address:

• there won't be any DMZ servers in Phase-I deployment
• my primary access point/router will need to interact with the Class-C primary router.
• my Class-B devices need to access some Class-C printers or resources
• some Class-C resources need to access some Class-B printers or resources
• mobile & hand-held devices need to work everywhere but do so securely

Will I need, or is it a preferred deployment, to have a configured DNS in either the Class-C or the Class-B LAN?


Thanks in advance,
~~~ 0;-Dan

I don't know enough to proffer any suggestions, but I can point you to the best tutorial on subnetting I have ever seen. I hope it will give you some hints.

Don't be put off by the HTML 3.0 formatting. When I first encountered it, it was on a *.edu site. My best guess is that the author retired or left academia and put it up on his personal website.

I also found this article by searching for "two LANs one modem": https://blog.itpro.tv/how-to-configu...on-one-router/

1 members found this post helpful.

Unless you're planning on deploying a large network with many hosts, then two small subnets is likely all you require for a typical SOHO network. For example, 192.168.2.0/25, and 192.168.2.128/25 would provide for 126 hosts each! The class you choose is unlikely to matter in the context of separating two networks for home and office use. You may need to clarify further if your requirements/reasons are different than speculated.

Many home routers would be very limited in what they could provide, so I'd recommend using a small business/enterprise grade router. No need for top-end (unless your budget allows it). For example, an Ubiquiti or Mikrotik device would probably suffice, or at least a router running DD-WRT or OpenWRT for configuration purposes.

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Say that I have two subnets: 192.168.1.xxx for all of those out-of-box network gadgets and toys and 192.168.10.xxx for real work (mostly). Won't I need route table entries so that my wife 1.xxx iDevice can access my high-end 10.xxx printer and similar situations?

Thanks in advance,
~~~ 0;-Dan

Yes, the router should be configured to route traffic between the two subnets.

1 members found this post helpful.

Where do I find a good tutorial on creating the required route table entries?
I think that the internalroute table entries would enable SUB-A to talk with SUB-B and enable SUB-B to talk with SUB-A. I would expect that the gateway would enable both SUB-A and SUB-B to talk with the outside world with a suitable firewall. I worked with this stuff years {decades} ago but have forgotten most of what I knew then.

Thanks in advance,
~~~ 0;-Dan

Yes, that should be the case.