I bought this router a couple of months ago in the hopes to feed a house with many wireless devices, but things changed. I ended up keeping it for future use. I recently moved into an apartment that has Gigabit FTTP service through Centurylink, which uses PPPoE, a Vlan tag of 201 and the MTU set at 1492.

I was able to get this router working for those requirements by flashing it with OpenWRT Barrier breaker 14.07
I finally got it working on the fiber connection today but I seem to have encountered an issue with wan performance.

This is what I get when using the centurylink Technicolor C2000T router:

And this is what I get when using the TP-Link with openWRT (mtu set to 1492):

I found a few older topics on these forums of people having similar issues (though I didnt see any from people using a gigabit WAN connection). Is this some kind of limitation of how OpenWRT operates?
Is there something i can change to fix this (so i dont have to rent/buy the CL router)?
or do I need to stick with the CL router or buy a business class router that has configurable VLAN settings from the factory?

any help would be greatly appreciated, Thanks.
-Nemesis

openwrt won't support hw accelerated nat, so you won't get gigabit wan speeds:

https://dev.openwrt.org/ticket/11779

you could MAYBE use a cheap gigabit router as wr1043nd (with openwrt) just for doing the vlan tagging, using the C7 with tplink firmware for NAT.

I'm totally unsure of the performance you could get.

I see, that was what I was reading in the older posts i mentioned. I guess I could try going back to the stock FW and see if it works with CL removing the VLAN tag requirement. otherwise I guess Im stuck with their router. Thank you.