The people who installed our new Point of Sale system overlayed their network on top of ours and there have been some persistent glitches.
Heading down in a few minutes to get the printer back online - planning to spend a couple hours later this week getting everything off DHCP and onto static IP addresses with a hosts file. Should fix things.
DHCP is great for a fluid network where you will have machines connecting ad hoc. To maintain any kind of partition, Static is the way to go - nobody with a laptop in our parking lot will be able to even see the POS terminals and the back-office computer let alone hack into them.
Come back and spend another wonderful day playing in the garden. Got a beef brisket smoking for tonight's dinner...