Issue with Bandwidth Setting on Archer AX55
Issue with Bandwidth Setting on Archer AX55
Dear TP-Link Support Team,
i have four Archer AX55 V1 routers, one acting as my main router and the other three as satellite. All routers are in AP mode.
I use ethernet backhaul.
I’ve noticed that every time I make changes to the Wi-Fi settings such as switching the channel the router automatically changes the bandwidth to 160 MHz, even though I had manually set it to 20 MHz.
This behavior persists after restarting the router and even when the mesh feature is enabled. I’ve checked the latest firmware release notes, but didn’t find any mention of this issue being addressed.
The only way to restore the correct bandwidth setting is by applying a previously saved backup. Without doing so, the router keeps reverting to 160 MHz, regardless of my manual configuration.
Could you please advise if this is expected behavior, a known issue, or if there’s a workaround to ensure the bandwidth setting remains fixed at 20 MHz?
Thank you in advance for your support.
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Hi,
By "applying a previously saved backup" do you mean a backup you made when the AX55 V1 was still running an older firmware version?
Although TP-Link doesn't officially recommend to perform a factory reset after upgrading to a newer firmware version, in reality it has always been a good custom to perform a factory reset after a firmware update to avoid the chance of running into unforeseen issues.
Anyway, I only have a single AX55 V1 here and therefore can't replicate your exact setup, but my AX55 V1 which was factory-reset after applying the v1.3.5 update doesn't show the behaviour you describe. I checked with Wi-Fi analyzer software and the channel width remains at 20 MHz even if I change the channel number.
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Hello@e-techniker,
Welcome to our community.
If your network topology diagram is as follows:
Main router—main AX55(AP mode)—3*satellite AX55)))((( client devices
(Note: — stands for wired connection,)))((( stands for wireless connection )
May I know the model of your main router?
If you change the main AX55 to wireless router mode, will the issue persist? When did this problem start occurring?
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@Joseph-TP the main router ist also the Archer AX55 V1.
I use the Access Point Mode on the main router.
The Problem starts, when I changed the Wifi Channel on the main router.
I will test it with Wireless Router Mode.
The mesh system is not directly connected to the Internet but it's behind another router. Can I still use the mesh system in wireless router mode just as before?
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Hi @e-techniker ,
Thanks for getting back to me.
Yes, I mean the model of 'another router'.
Please test wireless router mode to see if the issue persists.
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Thanks i will test it.
The 'another router' is an OpenWrt Router on a Raspberry Pi 4 which i use for the internet access.
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If I switch the main router to 'wireless router mode', but it remains connected via the LAN port instead of the WAN port, then the router itself can no longer access the internet for example, to download firmware updates.
In contrast to AP mode, it's not possible to assign a gateway and DNS server to the LAN port.
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Hi @e-techniker ,
When you change the operation mode to wireless mode, please confirm that the first Archer AX55 accesses the network via the WAN port.
For the Channel, please change the channel to 36, 40, 44, or 48.
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@Joseph-TP
if i switch the main Archer AX55 to Router Mode and connect it via the WAN port, it starts performing NAT (Network Address Translation).
This means the AX55 creates a separate subnet, and devices connected to it are no longer part of the original LAN.
Is there any way to fix the channel and bandwidth settings permanently while keeping the AX55 in AP mode and avoiding NAT?
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Hi @e-techniker,
I'm sorry for not getting back to you sooner.
Have you tried to change the channel to 36, 40, 44, or 48?
If the issue persists, please email the logs and backup files to support.forum@tp-link.com, attaching [Forum ID 834970] and details, and we will have a dedicated person to assist in analysis and follow-up.
Please refer to the FAQs below to collect system logs and backup files of the router:
How to view and save System Log of TP-Link wireless router
How to create and restore from a backup file on your TP-Link Router
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@Joseph-TP
I tested to swtich from channel 40 to 44.
Then the bandwidth was 160 Mhz, although it stands on 20 Mhz in the Wireless Config.
Reboot of all routers doesn't help. I had to restore the config from a backup, then the bandwidth was 20 Mhz again.
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