Post #4312129

TP-Link's "Easy Smart" aka "Unmanaged Pro" series of cheap Ethernet switches (TL-SG108E, etc) technically has VLAN support, you can configure up to 32 VIDs as tagged/untagged. But if you do so, the switch occasionally blasts its own DHCP discovers across *every single VLAN it knows about.*¹ Configured a port to have a tagged WiFi VLAN? Great, now the switch is going to pick up its management IP address from the guest subnet every couple of days. I don't know who thought this would be a good feature. ¹ (Or maybe it chooses at random? Or maybe it's just not initializing the buffer and using whichever VID it saw in the most recent packet? Or maybe it's only doing that in the non-VLAN mode, the opposite of what I was assuming? Fuck knows.)