how to assign range of ip address to the instance
how do i assign range to ip address to single vm.
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A Neutron port can only have one address. However, two ideas: (1) give an instance several NICs (2) inside the instance, add IP addresses to a network interface (you need to manage those addresses yourself). If you make your question more specific, I or other people might have other answers.
Yes your are right here, this is what i want to achieve