If this is the one that has the build in AV scanning etc, you need to disable that.
It's capable of preforming well however, firmware is pretty bogged down.
Any comments made are personal opinion and do not reflect directly on the position my current or past employers may have.
Also remove any port forwarding you have on the router. Mine was the same until i did this.
It's a pretty low spec device with poor firmware so you won't get close to 1Gbps unless you disable all the usual features on a router such as QoS, port forwards etc that slow it down. 3rd party firmware will provide slihghly better performance.
I bought an ASUS RT-AC68u router, for us to connect to slingshot UFB. We had the same model before on VDSL, for great parental control software. (Slingshot provided modem didn't )
Anyway, three calls to slingshot, first got it configured, then when it dropped off, second call to slingshot couldn't help, third call said they wouldn't help as it was third party router.
Called Asus. Second call got it set up, download speed 837Mb/s!
LAN, IPTV tab,
1. Select ISP profile "Manual setting"
2. Internet VID = 10, PRIO = 0
LAN Port 4 VID = 10, PRIO = 0
LAN Port 3 VID = 10, PRIO = 0
WAN - Internet Connection tab
WAN Connection type = Automatic IP
Enable WAN, NAT, UPnP = all yes
Connect to DNS server automatically = yes
Authentication = None
Hope this helps other people, I spent a lot of time searching and trying!