Folks, recently whilst trying to understand adding static routes to my router I did the following;

I added a computer to my network and fixed its IP address giving it a completely different subnet to my existing home network.

I then added a static route on my router's configuration page selecting the LAN interface and using my router's IP address as gateway.

This device was not available on my network until I enabled it in the configuration page at which point this completely different IP address was available to ping and log in to using SSH.

When logged in via SSH I checked the device's IP address and it was a completely different subnet but strangely it was able to ping all devices on my original network address.  I cleared the ARP cache on both router and device but still device was able to communicate with other nodes on my original network address.

Is this normal behaviour?  I was under the impression it would be isolated.

Geoff Lane