Increasing IP range on existing network

Hi

I have a network which was setup as a standard 192.168.1.1 /24 range. This was fine and should have been plenty of addresses for the network.
However the company expanded unexpectedly and they installed a new production line. The range would have been fine for the expansion of PCs however the people that put the production line in stuck all the components on the network and took up 105 IP addresses. Another company then came along and put a camera and door security system in and took a load more IPs.

So now I'm looking at a network with only about 10 ip address left and they are planning on buying iPads for the sales team.

What I'm trying to establish is if I can expand the IP range without additional hardware? And if so how do I go about extending the number of IP addresses I have?

The main network of PCs need to be able to see the production line devices for monitoring and reporting.

Here's where it might get tricky. Getting the 3rd party company to change the static IP settings on their components may not be easy. As a last resort we may be able to get them over to do it, but they are in Germany and we are in the UK. So it might be expensive to do.
Changing printers and the security system shouldn't be a problem.

I've attached a diagram of our current network layout.

Any help or advice would be greatly appreciated.

Many thanks.

Warren
Network.png
Warren LloydMDAsked:
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Manfred BertlManagerCommented:
You can add another virtual interface (for example 192.168.2.10) to your router (if it supports it) and/or also to your DHCP server (for example 192.168.2.1) for serving addresses in the new subnet. Should work w/o any problem; every system could reach every other on the same or the other subnet.
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Mohammed KhawajaManager - Infrastructure:  Information TechnologyCommented:
What mbertl has suggested would work, however, the two subnets talking to each other would have to traverse the router which means that your router interface will be very busy and your maximum throughput would be limited to the speed of the router.

The best suggestion is to do the following:

1.  Create a new VLAN for your production if your production devices do not need to talk to the business network (mbertl's suggestion).  This is the preferred way to ensure your production network is isolated and whatever devices need to communicate with business network should traverse a firewall
2.  Same as point 1 for cameras.  Also note that as you isolate different kinds of traffic, you are making your network much more stable
3.  Change the current subnet mask from /24 to /21 or /22 to get more IP ranges

Most of the devices I believe are Windows based and can be changed easily and ditto for cameras and other network devices.
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Warren LloydMDAuthor Commented:
Hi

Thanks for your comments. I'm going to get some fibre to cat6 converters and connect the production line up to a separate port on the router. I can then create a vlan with inter-lan enabled so the main network can see the production line machines.

Many thanks for your help.

Warren
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