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Installing ubuntu server 20.04 via live cd. I am at the network setup

Manual setup static ip (I am using public IP Address) and i get the error shown after entering the IP

subnet: 255.255.255.224/27

Address xxx.xxx.219.146

xxx.xxx.219.146 is not contained in 255.255.255.224/27

Gateway xxx.xxx.219.132

This of course is incorrect as it is contained in the subnet The IP range is from xxx.xxx.219.128 through to xxx.xxx.219.159

Useable IP's are from xxx.xxx.219.132 - xxx.xxx.219.158

You cannot proceed with the setup as it does not allow you to with the above error. Unless you select DHCP which i do not use. As it also does not get assigned an IP from DHCP the interface is auto disabled.

Any ideas on where i am incorrect or work around would be greatly appreciated :) Thanks in advance

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  • If i enter just the subnet 255.255.255.224 it gives the error Should be in CIDR form xx.xx.xx.xx/yy – Patdundee Sep 4 '20 at 20:37
  • 255.255.255.224 is not a valid subnet. It can be, however, a valid subnet mask. The two are not interchangeable. – user535733 Sep 4 '20 at 20:44
  • Thats what happens when you get brain strain I should have noticed it before i posted :) – Patdundee Sep 5 '20 at 8:57
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Just figured it out it is asking for a subnet not a subnet mask

instead of the subnet 255.255.255.224/27

i needed to enter the range xxx.xxx.219.128/27 :)

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