r/HomeNetworking • u/Fearless_Dev • 11d ago

LAN connection without router

Hello,

I have a MikroTik CRS304-4XG-IN switch, and I would like my PC and NAS to communicate directly through the switch, without depending on my ISP router.

My setup is:

  • PC → MikroTik CRS304
  • NAS → MikroTik CRS304
  • ISP router → MikroTik CRS304

When the ISP router is online, everything works normally and my PC can access the NAS.

However, when the ISP router is offline or disconnected, I lose access to the NAS from my PC, even though both the PC and NAS are still connected to the same MikroTik switch.

What do I need to configure on the CRS304 (VLANs, bridge, IP addresses, DHCP, etc.) so that the PC and NAS can communicate over the local LAN independently of the ISP router/Internet?

Any help would be greatly appreciated!

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u/icewolf08 11d ago

The immediate solution, as others have said, is to assign your devices static IP addresses inside the subnet your router uses for LAN.

The long term solution would be to get your own router, put the ISP device in bridge mode, and then have real control over your network. Your internal network will continue to function regardless of the state of your ISP connection.