topic Re: Home Hub 4000 - multiple LAN ports under a single subnet in Internet

Home Hub 4000 - multiple LAN ports under a single subnet

2bi — Thu, 25 Jan 2024 20:32:52 GMT

All my PCs (4) are connected to the Home Hub 4000 Modem using ethernet cables (1 per LAN port).

The problem is that every PC is on a different LAN (LAN 1,2,3,4) with different subnet and I can't make them "see" each other.

Could you please help?

Re: Home Hub 4000 - multiple LAN ports under a single subnet

Vanadiel — Thu, 25 Jan 2024 20:50:11 GMT

They should not be on a different subnet. I am not sure what you are seeing, but they all should have an IP address within the same subnet range of 255.255.255.0.

That should provide you with an address pool of 256 and a host pool of 254.

The LAN 1, 2, 3, 4 are just the LAN port numbers.

I don't know what you are trying to accomplish, but if you use the ping command from a command prompt to the IP of another PC on one of those ports, you should be able to ping it and get a ping reply back.

Re: Home Hub 4000 - multiple LAN ports under a single subnet

ZaneP — Thu, 25 Jan 2024 21:40:06 GMT

Your default DHCP lease table should something like this. Note the subnet.

Did you change any settings on the modem?

Re: Home Hub 4000 - multiple LAN ports under a single subnet

Vanadiel — Fri, 26 Jan 2024 17:25:32 GMT

Based on that picture I should correct my post as you will have an address pool of 246, not 256. A bit odd the default is 10 to 254, but it looks like that is what the default is.

Re: Home Hub 4000 - multiple LAN ports under a single subnet

2bi — Wed, 31 Jan 2024 00:08:41 GMT

To clarify, DHCP is enabled. Modem is set to default. I have each computer connected to a separate physical LAN port of the modem. The subnet of all computers are 192.158.2.x. The problem is that I cannot ping from one computer to the other. For example, my living room computer on port 1 cannot ping the computer on port 2, or access it's shared folders. I tried testing from both computers and they cannot see each other.

Re: Home Hub 4000 - multiple LAN ports under a single subnet

Vanadiel — Wed, 31 Jan 2024 15:29:44 GMT

If you have a 5 port switch available, you can try putting your devices on the switch and see if they can be pinged. That would rule out any local configuration issues.

Re: Home Hub 4000 - multiple LAN ports under a single subnet

BellNick — Thu, 01 Feb 2024 16:17:24 GMT

Hi there @2bi
Thank you for your post.
Are you able to share what computer makes you have?
Looking forward to hearing back.

Re: Home Hub 4000 - multiple LAN ports under a single subnet

2bi — Thu, 01 Feb 2024 16:20:51 GMT

Thank you for the quick answer!

Unfortunately I do not have a switch. The modem was received/installed 1 month ago based on the instructions. No other changes were made in the configuration. The DHCP tab looks exactly as shown in ZaneP's answer.

Is there any other way to set-up the LAN without a switch?

Re: Home Hub 4000 - multiple LAN ports under a single subnet

Vanadiel — Thu, 01 Feb 2024 16:49:34 GMT

A few things you can try from any of the machines.

- ping the gateway 198.168.2.1

- do a tracert to one of the other machines that are connected to your LAN.

Now the thing I want to make sure off. You mentioned before "The subnet of all computers are 192.158.2.x."

I want to make sure that was a typo and they have an IP in the range of 192.168.2.X

Re: Home Hub 4000 - multiple LAN ports under a single subnet

2bi — Thu, 01 Feb 2024 18:36:12 GMT

The ping to 198.168.2.1 works:

The tracert to the other machine doesn't:

Sorry for the typo - the range is 192.168.2.X

Re: Home Hub 4000 - multiple LAN ports under a single subnet

Vanadiel — Fri, 02 Feb 2024 15:21:06 GMT

Looks like the LAN ports are isolated. Unfortunately I cannot test this as I do not have a home hub.

You could get a crossover cable to directly connect 2 machines without using a switch, to rule out any machine based firewall/protection issues. It will look like a regular Cat cable but it's actually wired differently. Crossover cable . Make sure to mark that cable because it cannot be used for anything else.

And at that point you might as well buy the $22 8 port gigabit switch and connect them all to that switch.