@LGuerra 

If you have done all we suggested but issue cannot get resolved, we recommend reaching out to the local tech support, so they can work with you in looking into the issue further or help with the replacement.

@Kevin_Z Had the same remarks of support. Tried it and no result on the AX11000. We tried everything. Also directly connected to the modem. All my cables are CAT6 copper. Problems occur after the firmware upgrade for OneMesh. You cannot go back to the previous version without OneMesh. 

Strangely after a reboot when the first 5Ghz band kicks in my speeds are back to 400mbps+. But after a few minutes it drops to 30 even. The firmware is not good. My router is important for my home office and now I run into issues. The support engineer on the phone told me they probably are slow with the fix since it require a new firmware update. 

The router worked perfectly before and now it is useless for me. Still on warranty I have sent it back. Good to let users test, but they should have the option to go back to the last stable perfered version. Poor support this is. I took my old c5400 from the shelf and that one is running on 400+ mbps.

Hope they repair it by completely flashing it to the pre onemesh situation or give me a new one without problems. For a router of more than 360 euro this is very very dissapointing. 

@3845KG @Kevin_Z 

Same trouble, after updating to OneMesh (and same on last firmware on AX11000) i get this problem, some times wan port in Auto negotiation drop to 100mb\s and hold it, if I put by hands 1000mb\s - it says port unplugged, AND if I put THIS CABLE on Lan1-Lan8 - IT's momently say - 1000mb\s. Only plug\unplug wan port many times help. 

on firmwares BEFORE onemesh -  never seen.

if such a problem exists only on wan, can you do that the port can be selected Lan1 for Internet?

AX11000 

Firmware Version:

1.2.3 Build 20210719 rel.14861(4555)

@MayBe88 

We will still suggest you try with a different cable between the modem and the AX11000 first to confirm if that will help.

Can we know the model of the ISP modem, please? To locate this issue and try to fix it, we would like to follow up on your case via email. Please check your inbox and provide the information that we need.

@Kevin_Z 

ISP - MTS RUS, Ethernet port (1Gb\s) from ISP in apartments.

Connection type - Dynamic IP

Router - AX11000 EU v1.0

Wan port - auto negotiation

===

To remove the wan port from 100 mb / s - 3 reboots, with power off, un-plugging the cable 3-4 times. By defaults - router plugged by 8m cat 5e cable. I testing various cable, like 1m cat6, self-made path cord and supplied cable from router box (for shorts cables - I take router closer to ISP port). 

If I plug all cables in Lan1 port  at moment when "wan-bug" - always show 1gb\s connection.

This bug I have about 2-3 times after flashing to OneMesh and above. Before router working about 1 year without problems (reboot by Mondays every week by schedule).

IDK why it happened, found no dependency. Only one thing was changed - firmware.

If I connect WDR4300 in "bug-time" - his WAN port in 1gb\s state, re-plug to AX11000 - says 100mb\s 

Because I won't 100mb on WAN - I always do procedure from above, but i think is not normal.

Speedtests from web-interface says:

when port on 100mb\s =  92.03 Mbps 93.05 Mbps

when normal 1gb\s = 776.19 Mbps  669.65 Mbps

@MayBe88 

Thanks again for all the details. The support engineer will contact you via email to troubleshoot further, please check the email and follow it up.

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