Wifi speed is limited by lan

My device is phicomm k2g which has a wan with 1000mbps and 4 lan with 100mbps. Single cpu. 2.4g and 5g wifi.

When i use it as router and use wan connect internet by ppoe. Wifi speed is limit to 100mbps to internet.
So i assign wan to lan port, i turn off dhcp in br-lan, and change protocol to static ip, then assign a local ip: 192.168.1.100. I use isp router to connect internet by ppoe, and connect isp router lan to my router wan port which i have assign to lan.
Everything works fine, but wifi speed is limit to lan speed 100mbps.
I change br-lan protocol to unmanaged, wifi speed now up to 1000mbps. But i cannot visit my router as it donnot have a ip, it just as a switch.

So i have to create another local interface with a lan port, and turn on dhcp, so when i want to visit this router, i connect by this lan port with wired.

I want to know, is there any way i donnot have to create a new interface to visit my router when the router as a switch. And why when i use static ip protocol the wifi speed is limited, the wifi should go direct to cpu and wan port.

hardware limitation - you don't really have a:

check https://openwrt.org/toh/hwdata/phicomm/phicomm_k2_psg1218

Thanks for your reply.
k2g is a little upgrade then k2.
it did has 1Gbit wan and cpu.

Anyway, can you explain the difference between br-lan's static ip and unmanaged protocol?
static ip: the speed is limited by lan's 100Mbit
unmanaged: the speed can go up to wan's 1Gbit.

The two kinds of switch performance different.

then you need to patch the openwrt so it uses this upgrade properly - now it sets all ports to 100mbps

EDIT - it seems there is already a k2g profile that sets the wan at 1g

in managed state (static ip as you call it) it "plugs" all ports into the same 100mbps switch and in unmanaged state is "unplugged" from the switch so you can benefit from the 1g port

TLDR - I guess you can't benefit from the 1gig port because the wifi is plugged into the 100mbps switch

I see.
So it can be fixed by code. Not because the cpu's poorly performance.

Thanks for your explanation.

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how about if you just remove ALL lan ports 1-to-4 from br-lan and leave only wifi as member - can you access the router management and have your wan as 1g?

Sounds a good idea.
I will try it later tonight.

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