So, I upgraded router to latest DD-WRT firmware.
Now, for some reason, can't see my Mac Desktop from my MacBook if connected to Ethernet. Macbook has DHCP, Mac Desktop has DHCP with manual IP.
I can see the Mac Desktop if I connect via Wi-Fi, but not through ethernet.
I've released / renewed DHCP a few times, rebooted, flushed dscache, power cycled router.