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Ubuntu 22.04.2 Jammy : Netplan or nmcli Network-Manager resulted error in network definition invalid prefix length of IPV4 248 subnet mask

in flag

I can't apply network configuration on Ubuntu 22.04.2 Jammy LTS of using IPV4 with 248 subnet mask.

This is the error message of using netplan: enter image description here

This is the error message of using network-manager: enter image description here

Regarding both subnet-mask or public-ip of what we can use, we just receive them from our Internet-Provider (119.18.157.14/248) that we can't change it. But why does Ubuntu 22.04.2 Jammy LTS tell it us as "the wrong prefix" ?

Kindly please help

Regards

Syamsul Arifin avatar
in flag
Finally I get solve the problem with /29 of 255.255.255.248 subnest mask and the problem Closed.
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