Centurylink 1Gbps WAN Speed 1/2 what it should be

[zero65]

I have a rt-ac1900p running merlin 380.68.4 and my download speeds never exceed 500Mbps where as my upload speeds usually get to around 900Mbps .
In the switch control I can see the following

NAT Acceleration CTF (Cut Through Forwarding) is enabled.

So I have CTF enabled...I have qos off, AI off, what else am I missing here to get my max DL speed...One additional piece of info I have IPTV set for Manual and the VID set to 201 so I don't use CL modem and connect directly to the OTN.

Thank you in advanced for any help or advice,

 

[doczenith1]

Are you using a PPPoE type connection to your ISP? If so that may be your issue. I think the 384 branch that Merlin is working on has included the fix that Asus provided in their 3.0.0.4.384.20308 firmware.

 

[superjet]

Does centurylink still require you to use vlan201 for your wan connection? If so does that turn off the hardware accelerated CTF?

 

[zero65]

So what I did was put a managed switch between my ont with vlan id 201 and the my wan port rt-ac1900p and turned off IPTV ...adn I have my download/upload speed....940 up and down consistently...Thank you all