Looks like that has fixed it! Cheers Fae! Will do a bit more testing a few more reboots to make sure there is nothing 'hinky' going on but final working config was to: All Layer 3 Routing turned...

Reading back my previous - I forgot to mention a pertinent detail ... I can only blame the fact I was posting around 2am ish my time :) I had a Ubiquiti NVR on Port 16 of the switch sitting on vLAN...

@KJK The 10.0.100.20 IP was only in vLAN1 for the first 'test' to show no traffic was passing to the switch from any vLAN - and I typed 'as expected' at the end of the test to show I expected it NOT...

@KJK Alrighty, took me a bit longer than expected ... Essentially I repeated everything I did last night after wiping what was successfully running: Attempt 1: Wiped vLAN 10 Interface and the vLAN...

@KJK Cheers for that reply! Yep, tried that. I set Port 1 (1/0/1) with a PVID of 100 Then I set switchport general allowed vlan 100 untagged Then switchport general allowed vlan 10 tagged Still...

@Somnus cheers for the reply! I tried every combo suggested in about 15 other posts and comments I googled all night. None would work. My Uplink switches (ES-48's) are all working fine and have been...