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    Cloud Box:Limits

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    Cloud Box:Limits

    Last Updated:Jan 19, 2024

    This topic describes the usage notes and limits on the features and service performance of CloudBox.

    Usage notes

    • You can only purchase and use the CloudBox service. The hardware facilities belong to Alibaba Cloud.

    • Cloud boxes can be deployed only in data centers that meet delivery conditions. Before you submit orders in the CloudBox console, make sure that you understand the delivery conditions of cloud boxes. After you submit orders, Alibaba Cloud engineers perform an on-site survey on your data center and provide renovation suggestions. For more information about the requirements for the on-premises data center where a cloud box can be deployed, see Deployment requirements.

    • After a cloud box is deployed in a data center that you specify, you cannot physically move the rack of the cloud box without a written authorization from Alibaba Cloud.

    General limits

    • You can purchase up to 50 cloud box racks within a region.

    • You cannot physically move the rack of a cloud box across regions.

    • You cannot purchase custom servers or use your existing servers.

    • You cannot use your existing rack for a cloud box and existing switches in a cloud box.

    • If the network connection of a cloud box is interrupted, the services provided by the cloud box are degraded and the following limits take effect:

      • You cannot exchange data between the cloud box and Alibaba Cloud public cloud. For example, you cannot upload snapshots of the cloud box to Alibaba Cloud public cloud, upgrade the system, migrate Elastic Compute Service (ECS) instances to Alibaba Cloud public cloud, or manage CloudBox resources in the Alibaba Cloud Management Console.

      • ECS instances and disks in a cloud box are interconnected. A cloud box and on-premises devices are interconnected. However, Object Storage Service (OSS) in a cloud box is not supported.

      • ECS instances in a cloud box do not support failover.

      • API operations for CloudBox are not supported.

    Note

    For more information about the limits of cloud services related to CloudBox, see the help documentation of each service.

    ECS instances

    Item

    Limit

    Migration of ECS instances to Alibaba Cloud public cloud

    You can cold migrate only ECS instances that are in the Running state to Alibaba Cloud public cloud. You cannot migrate ECS instances that failed to run to Alibaba Cloud public cloud. Hot migration is not supported.

    Failover

    Failover is not supported if the number of ECS instances that failed to run is greater than that of ECS instances that can be created by using the instance types specified in CloudBox.

    Auto scaling

    You can perform auto scaling only for ECS instances in a cloud box.

    Change of configurations across instance families

    Instance families included in compute stock keeping units (SKUs) of cloud boxes are fixed. You cannot change the instance types of ECS instances in a cloud box.

    Change of private IP address

    You cannot change the private IP addresses of ECS instances in a cloud box.

    EBS

    Item

    Limit

    Block storage cluster

    A cloud box corresponds to a block storage cluster. You cannot delete the cluster or reduce the capacity of the cluster.

    Change of disk specifications

    A cloud box supports only one disk category. You cannot change the specifications of the disks.

    Disk type

    Only PL0 enhanced SSDs (ESSDs) are supported.

    Disk attaching

    Disks in a cloud box can be attached to only ECS instances in the cloud box.

    Disk resizing

    • You can expand the storage capacity by increments of 12 TiB.

    • The storage capacity of existing racks is preferentially expanded. If the capacity after resizing exceeds the capacity range that the existing racks can provide, new racks are required.

      Note

      You can go to the resizing page or contact the customer service manager to check whether the current racks meet your requirements.

    Disk encryption

    You cannot encrypt disks in a cloud box.

    OSS

    Item

    Limit

    Bucket quantity

    An Alibaba Cloud account can be used to create up to 100 buckets in CloudBox.

    Storage type

    Only Standard buckets and objects are supported.

    Encryption method

    Objects can be encrypted on the server only by using SSE-OSS. SSE-KMS is not supported.

    Access method

    The internal endpoint is provided for access. The public endpoint is not supported. If you want to transfer OSS data between CloudBox and Alibaba Cloud public cloud, you must establish network connections between CloudBox and Alibaba Cloud public cloud and use ossimport to transfer data. For more information, see Overview.

    Network

    Item

    Limit

    EIP

    You cannot directly associate elastic IP addresses (EIPs) with ECS and Server Load Balancer (SLB) instances in a cloud box.

    SLB

    • You cannot attach SLB instances, including Network Load Balancer (NLB), Application Load Balancer (ALB), and Classic Load Balancer (CLB) instances in Alibaba Cloud public cloud to ECS instances in a cloud box.

    • You can create only CLB instances in a cloud box. You cannot create ALB or NLB instances in a cloud box.

    • You can attach CLB instances in a cloud box to only ECS instances in a cloud box. You cannot attach CLB instances in a cloud box to ECS instances in Alibaba Cloud public cloud.

    • Network access control lists (ACLs) are not supported.

    • Only Layer 4 TCP or UDP listeners of CLB are supported.

    IPv6

    CloudBox vSwitches do not support IPv6 CIDR blocks.

    GA

    You cannot use ECS instances in a cloud box as the backend server of Global Accelerator (GA).

    VPC

    A virtual private cloud (VPC) that contains CloudBox vSwitches has the following limits:

    • You cannot activate multicast.

    • You cannot create an IPv4 gateway.

    • You cannot create a peering connection.

    CloudBox vSwitches do not support the following features:

    • Traffic mirroring. The elastic network interface (ENI) traffic in CloudBox vSwitches cannot be mirrored.

    • The flow log feature.

    You cannot create CloudBox vSwitches if VPCs meet the following conditions:

    • VPCs use peering connections.

    • VPCs are connected to a Basic Edition transit router of a Cloud Enterprise Network (CEN) instance.

    • An IPv4 gateway is created in a VPC.

    VPN Gateway

    You cannot create a VPN gateway for CloudBox vSwitches.

    NAT Gateway (NAT)

    You cannot create a NAT gateway for CloudBox vSwitches.

    PrivateLink

    You cannot create PrivateLink endpoint services and a PrivateLink endpoint for CloudBox vSwitches.

    Express Connect circuit

    • You can connect the Virtual Border Routers (VBRs) of a cloud box only to VPC router interfaces that belong to the same cloud box. You cannot connect VPC router interfaces that belong to other cloud boxes or Alibaba Cloud regions.

    • By default, the bandwidth for a cloud box to connect to a data center by using Express Connect cannot exceed 20 Gbit/s. If you want to increase the bandwidth, purchase bandwidth plans.

    Internet Shared Bandwidth

    You cannot create EIP bandwidth plans in CloudBox zones.

    CEN

    • VBRs in a cloud box cannot be attached to a CEN instance.

    • You cannot create an Enterprise Edition transit router for a CEN instance.

    • CloudBox vSwitches cannot access other VPCs by using a Basic Edition transit router of a CEN instance.

    Snapshot

    Item

    Limit

    Regions where snapshots are used

    You can use snapshots only in the cloud box in which the snapshots are stored.

    Image

    Item

    Limit

    Regions where images are used

    You can use the images in a cloud box only in the region where the cloud box resides, such as in Alibaba Cloud public cloud or other cloud boxes that reside in the same region.

    Deployment sets

    Item

    Limit

    Deployment set limits

    You can use deployment sets to deploy ECS instances in a cloud box only in the region where the cloud box resides.