Attach IP pool to internet gateway

Options

--description
--gateway
Name or ID of the internet gateway
--ip-pool
--json-body
Path to a file that contains the full json body.
--json-body-template
XXX
--name
--profile
Configuration profile to use for commands
--project
Name or ID of the project, only required if `vpc` is provided as a `Name`
--vpc
Name or ID of the VPC, only required if `gateway` is provided as a `Name`