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Solution Reported Issue and Workaround: Guest Network works only on Main Deco

Solution Reported Issue and Workaround: Guest Network works only on Main Deco

SolutionReported Issue and Workaround: Guest Network works only on Main Deco
Reported Issue and Workaround: Guest Network works only on Main Deco
2025-04-11 08:33:19 - last edited a week ago
Tags: #Official #Highlighted Thread

Previously Reported Models:

Deco E4,Deco M5,Deco M9 Plus,Deco X20, Deco X20-DSL,Deco X50-4G,Deco X50-5G,Deco XE75 and Deco BE63
 

Hi, Deco users,
It has come to our attention that randomly, users reported when satellite Deco units are hard-wired via Ethernet cables, no devices can connect to the Guest Network from the satellites and report an error "Couldn't get IP address". However, the same device connects well to the Guest Network of the main Deco, and after disconnecting the Ethernet cable from the satellite unit, the device can also connect to the satellite Guest network.

 

If you have experienced this anomaly, please feel free to leave a comment, including the model number and firmware version of your Deco.

 

Currently, some users have confirmed that restarting the ISP modem again after enabling the Guest Network resolves the reported issue.

In the meantime, the following firmware versions are also provided as a temporary workaround if restarting the modem didn't help:

Deco M4_V1/V2 1.7.0_build_20250228_Pre Release
Deco X20-DSL_V1 1.0.4_build_20220114_Beta
Deco X50-4G_V1 1.1.0_build_20230821_Beta
Deco X50-5G_V1 1.2.0_build_20241230_Beta
Deco E4_V1/V2 1.7.0_Offcial and above
Deco M5 1.8.5_Build_20250826_Beta
Deco M9 Plus 1.6.5_Official and above
Deco BE11000/BE63_V2 1.1.0_Official and above

 

▶Check What's Currently Going on With Deco ▶Deco BE85 1.2.0 Enhanced Mesh Backhaul Stability and Device Roaming Experience ▶Deco BE65/BE65 Pro 1.2.0 Enhanced Mesh Network Stability and System Security ▶Deco BE75 1.1.0 Added WireGuard VPN, Manual Channel Selection and More Try to leave a Message if urgent help is required.
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#1
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7 Reply
Re:Reported Issue and Workaround: Guest Network works only on Main Deco
2025-04-22 17:15:45

  @David-TP 

Hello

I have the same issue. Workarounds don't work.
Latest firmware is installed:

Deco XE75(EU)_V1_1.4.3 Build 20240926

 

Best Regards, Andreas

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Re:Reported Issue and Workaround: Guest Network works only on Main Deco
2025-04-23 06:04:39

  @Andi3971 

Hi, Thanks for the feedback.

Could you please send an email to support.forum@tp-link.com with some screenshots of your current network topology?

I guess you have already tested the same mobile clients can properly connect to the Guest WiFi of the main Deco XE75?

Best regards.

▶Check What's Currently Going on With Deco ▶Deco BE85 1.2.0 Enhanced Mesh Backhaul Stability and Device Roaming Experience ▶Deco BE65/BE65 Pro 1.2.0 Enhanced Mesh Network Stability and System Security ▶Deco BE75 1.1.0 Added WireGuard VPN, Manual Channel Selection and More Try to leave a Message if urgent help is required.
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Re:Reported Issue and Workaround: Guest Network works only on Main Deco
2 weeks ago

  @David-TP 

Deco M5 with firmware 1.8.5 seems to also be affected by this. 

I have rebooted the ISP modem, as suggested in the workaround, and the clients were able to connect to the Guest network.

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#4
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Re:Reported Issue and Workaround: Guest Network works only on Main Deco
2 weeks ago

  @Scuba_DiverHi, thanks for your notification. I also saw your reply in post# 837696.

I have the senior engineer updated and will keep monitoring if there is going to be more similar feedback.

 

Thank you very much.

Best regards.

 

▶Check What's Currently Going on With Deco ▶Deco BE85 1.2.0 Enhanced Mesh Backhaul Stability and Device Roaming Experience ▶Deco BE65/BE65 Pro 1.2.0 Enhanced Mesh Network Stability and System Security ▶Deco BE75 1.1.0 Added WireGuard VPN, Manual Channel Selection and More Try to leave a Message if urgent help is required.
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Re:Reported Issue and Workaround: Guest Network works only on Main Deco
Wednesday

  @David-TP FYI I was having this problem with a BE85 mesh running current firmware. When going back through the settings I noticed at the bottom of the guest network screen a reminder to set the vlan if using a switch.

 

I did not have to do this with my previous fritz mesh (connected to the same managed switch) so had overlooked it.

 

As soon as I created a new vlan in the switch and tagged all the BE85 ports the guest network started to get IP addresses.

 

Hope this helps others that might have overlooked this.

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Re:Reported Issue and Workaround: Guest Network works only on Main Deco
Thursday

  @GAD70 

Excellent! Thank you for sharing with uslaugh. 

Can I have the model number of your switch? If it is a smart managed switch, setting a VLAN on the switch is needed:

How to extend guest network when there is a switch between Decos

 

Thank you very much.

Best regards.

 

▶Check What's Currently Going on With Deco ▶Deco BE85 1.2.0 Enhanced Mesh Backhaul Stability and Device Roaming Experience ▶Deco BE65/BE65 Pro 1.2.0 Enhanced Mesh Network Stability and System Security ▶Deco BE75 1.1.0 Added WireGuard VPN, Manual Channel Selection and More Try to leave a Message if urgent help is required.
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Re:Reported Issue and Workaround: Guest Network works only on Main Deco
Thursday

  @David-TP Yes its a managed switch (SG3824X-M2)

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