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How my setting looks like in the picture enter image description here

I use the gateway as the encapsulation for the router.

But everytime i try to add "Developer vlan" (Which in Norwegian is Utvikler) Then i just get a overlapping error. What am i doing wrong?

enter image description here

enter image description here

edit: I figured out the issue. All i did was make the IP unique enough. And yes the broadcast was wrong for sure.

But i had on IT Drift Vlan 10 changed to IP: 172.16.10.11 Subnett: 255.255.255.0 Gateway: 172.16.10.1

and Utviklere Vlan 20 changed to IP: 172.16.0.21 Subnett: 255.255.254.0 Gateway: 172.16.0.2

That did the trick more or less!

Appreciate the help either way!

Lars
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1 Answers1

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172.16.0.1/23 overlaps with 172.16.1.0/24 that is used for "IT-Drift". That is even the literal error message that you've cut off in your screenshot.

You need unambiguous subnets.

And btw: all your broadcast addresses noted in your diagram are incorrect. You might want to check out this excellent Q&A to brush up your subnetting skills.

Zac67
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