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No network traffic passing for specific network range on switch

Hi guys

I have an HP network 1820-48G J9981A switch. We have a network range on this switch. It has been set with a IP. Prior to this, our network switch was completely vanilla and had no IP configurations.

Now, majority of appliances plugged into this network are on the range. However, we have 7-8 devices set to range. So now, we are completely unable to get to anything on the IP's, as the switch is currently only seeing the

My question is, what's the best way now to configure this switch? I don't want to reset it to factory default as we won't have any management. So do I set up VLAN's on all ports? How would you do it?

Or, can I set routing on the switch to say anything on network needs to be forwarded on to the gateway?

Thanks for helping
Switches / HubsWindows NetworkingNetworking

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8/22/2022 - Mon
Paul MacDonald

A network switch <> router.

A switch routes traffic between two or more ports.  A router routes traffic between two or more networks.

192.168.9.x and 192.168.10.x are two different networks.  You'll need a router to route traffic between the two.

The switch is already connected to a router which has a gateway of and But, old switch was vanilla, so traffic from both networks passed through.

Now that switch has a management IP, it won't route any of the traffic to the necessary gateway.

Should I reset the switch to factory default remotely?

Thank you
Paul MacDonald

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3rd option. If the router has an interface configured in each subnet, just connect the associated ports on the switch to the router and assign those ports to the vlan that the router interface is in.
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William Peck

So it looks like a reboot on the switch got us to access some of the network devices on the network. The rest look like they are suffering from application related issues.

Looks like it's been a false alarm. Thanks for your help.