This topic describes the limits on Cloud Enterprise Network (CEN) and how to apply for quota increases.

Limits on CEN instances

ItemDefault quotaAdjustable
The maximum number of CEN instances that can be created by each Alibaba Cloud account5
You can use one of the following methods to increase the quota:

Limits on Enterprise Edition transit routers

Enterprise Edition transit routers

ItemDefault quotaAdjustable
The maximum forwarding capacity supported by a transit router100 GbpsNot supported
The maximum number of CIDR blocks that can be added to a transit router5Not supported

Network instance connections

ItemDefault quotaAdjustable
Virtual private clouds (VPC) connections
The maximum number of VPCs that can be attached to a transit router200
You can use one of the following methods to increase the quota:
The maximum number of transit routers to which a VPC connection can be attached5Not supported
The maximum bandwidth supported by a VPC connection10 GbpsNot supported
Virtual border router (VBR) connections
The maximum number of VBRs that can be attached to a transit router10
You can use one of the following methods to increase the quota:
VPN connections
The maximum number of VPN connections that can be attached to a transit router50
You can use one of the following methods to increase the quota:
The maximum number of transit routers to which an IPsec-VPN connection can be attached1Not supported
The maximum number of VPN connections supported by a transit router for equal-cost multipath (ECMP) routing16Not supported
Inter-region connection
The maximum number of inter-region connections supported by each pair of transit routers1Not supported
The maximum bandwidth supported by an inter-region connection when the bandwidth allocation mode for the inter-region connection is pay-as-you-go, and the regions connected by the inter-region connection are inside the Chinese mainland1000 Mbps
You can use one of the following methods to increase the quota:
The maximum bandwidth supported by an inter-region connection when the bandwidth allocation mode for the inter-region connection is pay-as-you-go, and at least one of the regions connected by the inter-region connection is outside the Chinese mainland100 Mbps
You can use one of the following methods to increase the quota:

Routes

ItemDefault quotaAdjustable
Route tables of transit routers
The maximum number of route tables supported by a transit router20Not supported
Route entries of transit routers
The maximum number of route entries supported by a transit router route table2,000Not supported
Routing policies
The maximum number of routing policies in the inbound direction that can be created on a transit router100Not supported
The maximum number of routing policies in the outbound direction that can be created on a transit router100Not supported

Multicast

ItemDefault quotaAdjustable
The maximum number of multicast domains supported by a transit router20Not supported
The maximum number of multicast members supported by a multicast group created for a transit router15
The maximum number of vSwitches that can be associated with a multicast domain created for a transit router10
The maximum number of multicast sources that can be added to a multicast group created for a transit router15
The maximum number of inter-region multicast domains that can be associated with a multicast group created for a transit router15

Traffic scheduling

ItemDefault quotaAdjustable
The maximum number of traffic classification rules supported by a transit router500Not supported
The maximum number of queues that can be created in a quality of service (QoS) policy3Not supported

Limits on Basic Edition transit routers

Network instance connections

ItemDefault quotaAdjustable
The maximum number of network instances that can be attached to a transit router10Not supported
The number of Cloud Connect Network (CCN) instances that can be attached to a transit router1Not supported
The maximum number of inter-region connections supported by each pair of transit routers1Not supported
The maximum number of transit routers to which a VPC can be attached 1Not supported

Routes

ItemDefault quotaAdjustable
The maximum number of route tables supported by a transit router1Not supported
The maximum number of route entries supported by a transit router100
You can use one of the following methods to increase the quota:
Routing policies
The maximum number of routing policies in the inbound direction that can be created on a transit router100Not supported
The maximum number of routing policies in the outbound direction that you can create on a transit router100Not supported