DIR-882 - keep or change as achieving less than half advertised speed

Main router D-Link DIR-882 connected to Fibre modem. Up until last couple of weeks still had original DLink interface. Now has OpenWrt stable.

2 years ago after moaning at ISP was upgraded from 500 to 1Gbps and did actually measure a wired connection at over 800Mbps at one point on my Android box.
Connection was dropped back to 500 and after moaning again recently was put back up to 1Gbps. Cannot get anymore than high 300s out of it and no change from stock to OpenWrt. ISP technician however could get 900 plus when directly attached to the ISP modem.

I also now have AX3000T attached as dumb AP so I guess I could try switching them round?

The other option I am thinking is to bite the bullet now and buy the GLiNet 6000 at it's current offer price and then just keep the DIR as a backup.

Any thoughts or anything I can try on the DIR-822?

Enable firewall soft offload, eventually get latest fw4.uc from firewall4 git.

Maybe try resetting to a default config, without using SQM. If that does not work, there is nothing much you can do.
On many routers, vanilla MT7621 CPUs could reach close to 900mbit for bare routing from WAN to LAN (especially the wave 2 generations like 882), if running OpenWRT >=23, on default setting, without even soft or hardware offloading.

Turning on HW offloading might helpto raise the roof, but comes with drawbacks.

300 looks similar to the max top speed for MT7615 AC Wifi or the CPUs max power for SQM.

before OpenWRT 23, MT7621 usually got close to 450mbit/s on wired routing and even the variants with single CPU port wiring towards MR7621 got close to 450mbit/s.

If default config does not rock, I would move on.
The AX3000T is for sure capable of routing 1gbit/s.

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It cannot do gig in gig out between 2 gigabit interfaces.

Sorry but are you saying that even if I switch the routers over the DIR as an AP still won't give anywhere near a gig on a wired connection? Or have I misunderstood completely?

LAN switch asic will make a gigabit, the limitation is logic over CPU, if you want to bridge in WAN youll need bridger or something like that.

The config is pretty much default other than adding guest and specific DNS.
I have not tried enabling SQM or HW offloading.......

If I change the DIR for the GLiNet should I be able to get near gig speed from the AX3000T access point which is connected by a lan cable?

Are you saying I need to put a switch in somewhere? (I had to look up asic...)

I have no idea if I do? If possible can you please explain in a few more words then maybe I will get it.
I had, perhaps erroneously, assumed that just adding an access point was relatively straight forward - I only access it wirelessly.

The mini computer has 2 ethernet ports, one is connected to WAN, other to a switch running other ports.
CPU can barely handle the copying packets between those.
Offload (and by extension bridger) makes that use 2-3x less CPU time, hopefully hitting the physical interface ceilings.

Thanks. That is a lot clearer.

IYO if I change to the GLiNet 6000 does that have sufficient CPU grunt so I don't have to get a switch and bridger - or is it still an issue?

Yep, that fully does gigabit.
Now try soft offload, if soft offload is required to reach gigabit you are out of CPU power to do SQM, so you are at the mercy of your provider to keep latencies and buffers low.

This is the box in Firewall zone, general settings I presume.
Ran a quick speedtest connected wirelessly to the access point before ticking the box - was around 300 ish
Ticked the box - same test 606..........
Sitting in front of the DIR - 350 without and nearly 550 with
Wired to DIR - over 800 with....

So it looks like Ali Express here I come.
I note that the offer price here is higher than in Europe so I there anything else up to $150 or so that I should consider instead of the Flint 2?

https://openwrt.org/toh/views/toh_available_16128_ax-wifi
Just compare to local electronics store.

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