Trapped with a /24 subnet and have run out of IPs

colinwheeler · 2024-04-15T15:27:01+00:00

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colinwheeler

With all the things we have around our houses now days as well as doing development with docker on an integration sandbox, I have run out of IP addresses. 254 has been reached and now I cannot proceed with my development.
Is there any way to reconfigure the subnet mask of the LAN network in these boxes?

Daniele_Sunrise

colinwheeler Welcome to the community!

No, this is not possible on the modem. However, you can set the modem to bridge mode and connect your own router, which has all the functions that are important to you. You can find instructions for bridge mode here.

Greetings
Daniele

colinwheeler

Thanks Daniele, I will look into it. The only problem that really seems to be posed by this potential solution is having to move the ISP router to another room as it will need to be in physical proximity to the new router and where it currently is (cable and electric box) does not have physical space for another router.

Do you know the name/specification of the cable that connects the router to the “cable” (not ethernet but the antenna type cable) connection in the wall?

Daniele_Sunrise

colinwheeler It should be such a cable. However, I recommend that you do not replace this cable, but leave the Sunrise modem where it is and consider a separate router connected with a longer LAN cable.

Greetings
Daniele

colinwheeler

Daniele_Sunrise Hi Daniel, thanks so much for the ongoing support. The problem that I have is that there is no way two cables between those locations. The house is pre-wired with single ethernet cables and co-axial cables running to each room, which is nice as they are cat 6e but that means that I need to move the Gigabox out of that cabinet so that I can put a replacement switch/router in there.

Daniele_Sunrise

colinwheeler How about the following solution:

1. the Sunrise modem stays with the power / cable box.
2. you connect a LAN cable to the Sunrise modem e.g. at LAN 1 and plug the other end into the patch bay, which supplies the room where your computer is located with Ethernet.
3. plug a LAN cable into the Ethernet socket on the wall and connect the other end of the LAN cable to your own router in the WAN connection.

This solution should work if you have a multimedia patch bay at the power/cable box.

Greetings
Daniele

colinwheeler

Daniele_Sunrise Hi Daniele, thanks again. I have included a diagram of my setup which should explain why that is not possible. I have many cabled devices in each room and they have a single connection back to the switching cabinet, that means that the only option is to replace the UPC modem with a switch

Daniele_Sunrise

colinwheeler Many thanks for the clean and really great graphic. I have been looking at the graphic for a long time now and I only see this solution, which is simple and without additional costs.

The kitchen:
I don’t see any devices installed there. How about plugging the modem into the cable socket there, connecting your own router and then feeding the patch bay backwards via LAN cable and then bridging the other LAN connections cables in the patch bay itself? The only disadvantage is that you then have the full load on one LAN connection, but this should not be a problem with new routers with sufficient capacity.

Otherwise I’m running out of ideas, as you have no space in the technical room where the patch bay is.

Greetings
Daniele

colinwheeler

Daniele_Sunrise Yes, this is the solution that I was looking at as well. That is why I asked about the COAX cable needed as I would need a new one to patch the Coax UPC to Coax Patch-Kitchen and then use the existing cable to connect the box to the outlet in the kitchen. This should work well and I just need to buy another cable. :-) Thanks again for all of your help in this regard.

Daniele_Sunrise

colinwheeler May I ask briefly how long the coax cable should be? I believe we can supply up to 9 meters.

Greetings
Daniele