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Not able to add a subnet to vpc

Getting this below error when trying to add a subnet with this ip address: 192.168.20.0/0

"Invalid IP address range. Use CIDR notation and enter the lowest IP address in the subnet."

1 Answers

/0 is an invalid range.  Valid ranges are shown here: https://cloud.google.com/vpc/docs/vpc

For a great visual, see: https://cidr.xyz/

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