The following table describes the limits that apply to Cloud Enterprise Networks (CENs).

Item Limit Quota increase supported?
The number of CEN instances that can be created for each account 5 Yes. Open a ticket.
The number of networks that can be attached to a CEN instance in each region 10 Yes. Open a ticket to apply for a quota of up to 15 CEN instances.
The number of bandwidth packages that you can purchase in either of the interconnected regions in each CEN 1 No.
The number of regions in each CEN instance 5 Yes. Open a ticket.
Limits on VPCs whose ClassicLink feature is enabled VPCs cannot use the 10.0.0.0/8 CIDR block. No.
Network instance No Express Connect can be created for network instances that are added to the CEN. No.
The number of route entries that can be created in each CEN 100 Yes. Open a ticket.
Sharing of NAT Gateways through CEN No No.
Support for cross-region access to cloud services No No.
Support for cloud services to access network instances in CEN No No.
Subnet routing
For a VPC that learns the route entries of a CEN instance:
  • If a VPC was attached to a CEN instance before October 22, 2019, only the system route table of the VPC learns the CEN route entries. If you want the custom route tables to learn the CEN route entries, you must reattach the VPC (which may interrupt service) or open a ticket for backend adjustment (which does not interrupt service).
  • If a VPC was attached to a CEN instance after October 22, 2019, all route tables (including the system route table and the custom route tables) of the VPC learn the CEN route entries.

For a CEN instance that learns the route entries of a VPC:

If a VPC has multiple route tables, the CEN instance only learns route entries in the system route table of the VPC instead of those in the custom route tables of the VPC.

No.