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Network netmask (prefix length) is not tuned correctly

Network netmask (prefix length) is not tuned correctly

Network netmask (prefix length) is not tuned correctly
Network netmask (prefix length) is not tuned correctly
2025-05-22 19:36:16
Tags: #Feature Request
Model: Deco X60  
Hardware Version:
Firmware Version: 1.5.5

Network netmask (prefix length) is not tuned correctly

 

Getting this warning from Fing.

Can someone please explain in a step by step fashion how to fix this?

Also, please explain how much work each step will cause (for example, will I have to restart every device on my network --a huge hassle) and does it lose all the naming information that I have gone to a lot of trouble to setup?

 

Dont just say things like "cange your subnet from xxx to yyy", explain what that means and what are the repurcussions of doing so.

 

Basically, with each step, don't assume I know what you know.

 

I am a technical person (and was a sys admin a long time ago, and am an advanced UNIX/LINUX coder, and was in technical support for probably the most complicated software on the planet (EDA/DRC/LVS)--so I'm not a total noob--I'm just not as familiar with networking protocols as maybe you are.

 

This Hardware/software is a consumer product, so explanations should be for consumers--not IT gurus.

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#1
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4 Reply
Re:Network netmask (prefix length) is not tuned correctly
a week ago
Sorry for the late reply if you are still having this issue please let us know  Thank You 
Need help with the Deco app, setup, Ethernet backhaul, network switch or rolling back firmware? Router or AP mode? https://community.tp-link.com/us/home/forum/topic/699816?page=1
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#2
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Re:Network netmask (prefix length) is not tuned correctly
Sunday - last edited Sunday

  @HelpFixDecoApp149484  i still don't know how to change it or if it's worth any network item renaming/ reassigning. The tool does explain how to fix it. 

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#3
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Re:Network netmask (prefix length) is not tuned correctly
Sunday

  @Brent-B1 

 

Going to tag a member of the tp-link staff to see if they can help with this it might be 24 to 48 hours before you hear from them 

 

@Carl 

Need help with the Deco app, setup, Ethernet backhaul, network switch or rolling back firmware? Router or AP mode? https://community.tp-link.com/us/home/forum/topic/699816?page=1
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#5
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Re:Network netmask (prefix length) is not tuned correctly
Wednesday

  @Brent-B1 

 

 

This is sometimes a message that FING will give you when you have a Mesh System.  Mesh systems like Deco often have wide subnets, which FING finds as inefficient because of how large the subnets are. Therefore, it may not be an actual concern.  Think about when Apple gives you a warning when you turn off the random MAC address feature built into iPhones. 

 

If you believe it's a genuine concern, we would need more information, if available. 

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#6
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