Ethernet Port 4 Showing Multiple Devices & Not Working (But Works on Vigor Switch) - Virgin Hub 5

Hey everyone,

I’m having a strange issue with my Virgin Hub 5 and was hoping someone might have come across this before or could shed some light.

Problem:

Ethernet Port 4 on the Hub 5 shows four different devices connected at the same time, which seems really odd. The connected devices list shows:

• Multiple entries listed as “unknown” with different MAC/IP addresses
• All of them showing as connected via Ethernet 4
• Speeds are all showing as 1000 Mbps

However, despite showing this, nothing actually works on that port — the connection in my games room, which is run from that Ethernet line, gets no internet through the Hub 5 directly.

What I’ve Tried:

• I plugged the same Ethernet line into my DrayTek Vigor switch, and everything in the games room works perfectly.
• All devices in the games room (console, smart TV, PC, etc.) get full access when routed through the Vigor switch.

This tells me the wiring to the games room is fine and the devices are working — but for some reason, the Hub 5 isn’t handling multiple devices properly over that single Ethernet port, or it’s getting confused by the switch?