def get_all_subnets_cidr(self, no_mask=False):
        """Returns all the subnets. """
        body = {}
        subnet_cidrs = []
        try:
            subnet_list = self.neutronclient.list_subnets(body=body)
            subnet_dat = subnet_list.get('subnets')
            for sub in subnet_dat:
                if no_mask:
                    subnet_cidrs.append(sub.get('cidr').split('/')[0])
                else:
                    subnet_cidrs.append(sub.get('cidr'))
        except Exception as exc:
            LOG.error("Failed to list subnet Exc %s", str(exc))
        return subnet_cidrs
Returns all the subnets.