AC4000 not hitting 1 Gig
I've been running the C4000 with a Virgin media hub 3 in modem mode. It's been delivering half a Gig WiFi speeds consistently for over a year, but I've recently upgraded to 1 Gig speeds, with Hub 4 in place of Hub 3.
Unfortunately, I'm not seeing speeds anywhere near 1 Gig. It's mostly around the 600 area, with the odd test getting to around 700 on a good day with a following wind.
Virgin have said the Hub 4 speeds are set at 1 Gig, and the problem must be the TP-Link router, but Virgin's customer service is terrible, so I'm not sure.
Are there any known issues with Virgin broadband, the Hub 4 and the C4000 please?