A few days before, local ISP upgrade my internet to 200M(with optical).
I connected WNDR4300 to the "optical modem" through wan.
Now there's a issue:
case1:  internet -------> optical modem ------>WNDR4300 ---------->my computer
maximum download speed is 100Mbps

case2: internet -------> optical modem ---------->my computer
maximum download speed is 200Mbps

why the wan is working at 100M as maximum? does openwrt limited the speed? or there's some other issues?

WNDR4300 wan get ip address from "optical modem"(192.168.1.X)  and lan ip address is 192.168.2.X

Your device is not capable of such network speeds when the CPU is used to route traffic, like OpenWrt does; original firmware uses hardware acceleration, and can reach higher speeds.

thank you!
my situation is :
I'm living ShangHai China, I have to use openwrt to install shadowsocks, chinadns so that I could access google, youtube and many sites banned by GFW.

GFW pollutes the DNS result(example:  ping google.com will get wrong ip address). shadowsocks and chinadns connect WNDR4300 with remote "clean server", transfer my dns request to "clean server", so that I could access the sites.

Do you think I set WNDR4300 as AP will reach higher speeds ? or I have to buy a better hardware ?

It should be able to reach more then 100M, check to to see that you have 1gb uplink.

/F

You should able to reach speed around 200 Mbps, check cables, all 8 wires should be connected.

WNDR4300 with openwrt, the maximum lan speed is around 200Mbps. --- After WNDR4300 connected to the 500Mbps cable, the download speed is around 200Mbps.

Is anyting limited by the openwrt or the hardware of WNDR4300?

And which model of router can reach around 1000Mbps lan speed after openwrt rom installed?

(Last edited by opkid on 26 Aug 2017, 16:05)

The CPU in the TP-Link WNDR4300 is only a single core MIPS running about 500 MHz.  Like eduperez said, to fully use a 200 Mbit ISP connection you really need a router with more CPU power.  An x86 box or dual-core ARM would be suitable.

(Last edited by mk24 on 26 Aug 2017, 16:14)

I'm using this router with a 250/20 Mbit connection, and I have no problem utilizing it fully.
Shadowsocks may be slowing you down, but I don't see any performance issues with mine (and my router is acting as an OpenVPN server for 2 other routers and a few laptops)