Help Center/ Cloud Connect/ Service Overview/ Notes and Constraints
Updated on 2024-10-14 GMT+08:00
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Notes and Constraints

General Constraints

There are some constraints when you are using Cloud Connect.

  • A cloud connection cannot be created between VPCs that have overlapping CIDR blocks, or communication will fail.
  • If you load a VPC to a cloud connection created using the same account, you cannot enter loopback addresses, multicast addresses, or broadcast addresses for the custom CIDR block.
  • If a NAT gateway has been created for any VPC you have loaded to a cloud connection, a custom CIDR block needs to be added and set to 0.0.0.0/0.
  • To use a central network, the following resources must have been created:
    • Enterprise router: used to build a central network
    • Global DC gateway: attached to an enterprise router for allowing on-premises data centers to access the cloud across regions
  • Policy management
    • A central network can only have one policy. If you apply another policy for this central network, the policy that was previously applied will be automatically cancelled.
    • In each policy, only one enterprise router can be added for a region. All added enterprise routers can communicate with each other by default.
    • A policy that is being applied or cancelled cannot be deleted.
  • Cross-site connection bandwidth management
    • A cross-site connection bandwidth cannot be changed or deleted when it is being created, updated, deleted, frozen, unfrozen, or is recovering.
    • The total of cross-site connection bandwidths cannot exceed the global connection bandwidth.
    • If a cross-site connection bandwidth is deleted, you will still be billed for the global connection bandwidth.

Quotas

A quota defines the maximum number of resources of a certain type that can be created in a region or account.

Table 1 Cloud connection quotas

Quota Type

Quota

How to Increase Quota

Cloud connections allowed in each account

6

Submit a service ticket.

Regions per cloud connection

6

Submit a service ticket.

Network instances allowed in each region

6

Submit a service ticket. You can request up to 10 network instances.

Bandwidth packages for each cloud connection

1

The quota cannot be increased.

Routes per cloud connection

50

Submit a service ticket.
Table 2 Central network quotas

Quota Type

Quota

How to Increase Quota

Central networks in an account

6

Submit a service ticket.

Policies for a central network

500

Submit a service ticket.

Policy document size (KB)

10

The quota cannot be increased.

Enterprise routers on a central network as attachments in a region

1

The quota cannot be increased.

Only one enterprise router can be added to a central network as an attachment in a region.

Global DC gateways on a central network as attachments in a region

3

Submit a service ticket.