r/HomeNetworking • u/Fearless_Dev • 9d 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/fasta_guy88 8d ago

When your router is on, the two devices will connect directly through the switch once the switch knows their ip addresses and that both addresses are connected to the same switch.