This topic describes the limits on Cloud Enterprise Network (CEN) and how to apply for quota increases.
Limits on CEN instances
Item | Default value | Adjustable |
The maximum number of CEN instances that can be created by each Alibaba Cloud account | 5 | You can use one of the following methods to increase the quota:
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Limits on Enterprise Edition transit routers
Enterprise Edition transit routers
Item | Default value | Adjustable |
The maximum forwarding capacity supported by a transit router | 100 Gbps | No |
The maximum number of CIDR blocks that can be added to a transit router | 5 | No |
Network instance connections
Item | Default value | Adjustable |
Virtual private cloud (VPC) connections | ||
The maximum number of VPCs that can be attached to a transit router | 1,000 | No |
The maximum number of transit routers to which a VPC connection can be attached | 5 | You can use one of the following methods to increase the quota:
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The maximum bandwidth supported by a VPC connection | 10 Gbps | No |
Virtual border router (VBR) connections | ||
The maximum number of VBRs that can be attached to a transit router | 10 | You can use one of the following methods to increase the quota:
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VPN connections | ||
The maximum number of VPN connections that can be attached to a transit router | 50 | You can use one of the following methods to increase the quota:
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The maximum number of transit routers to which an IPsec-VPN connection can be attached | 1 | No |
The maximum number of VPN connections supported by a transit router for equal-cost multipath (ECMP) routing | 16 | No |
Inter-region connections | ||
The maximum number of inter-region connections supported by each pair of transit routers | 1 | No |
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 mainland | 1000 Mbps | You can use one of the following methods to increase the quota:
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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 outside the Chinese mainland | 100 Mbps | You can use one of the following methods to increase the quota:
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The maximum bandwidth supported by an inter-region connection when the bandwidth allocation mode for the inter-region connection is pay-by-data-transfer, and one of the regions connected by the inter-region connection is outside the Chinese mainland and the other is inside the Chinese mainland | 100 Mbps | You can use one of the following methods to increase the quota:
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Routes
Item | Default value | Adjustable |
Route tables of transit routers | ||
The maximum number of route tables supported by a transit router | 20 | No |
Route entries of transit routers | ||
The maximum number of route entries supported by a transit router route table | 2,000 | No |
Route synchronization | ||
The maximum number of VPCs with which a transit router can synchronize routes. | 15 | No |
Aggregate routes | ||
The maximum number of aggregate routes supported by a transit router route table. | 20 | No |
Routing policies | ||
The maximum number of routing policies in the inbound direction that can be created on a transit router | 100 | No |
The maximum number of routing policies in the outbound direction that can be created on a transit router | 100 | No |
Multicast
Item | Default value | Adjustable |
The maximum number of multicast domains supported by a transit router | 20 | No |
The maximum number of multicast members supported by a multicast group created for a transit router | 15 | |
The maximum number of vSwitches that can be associated with a multicast domain created for a transit router | 10 | |
The maximum number of multicast sources that can be added to a multicast group created for a transit router | 15 | |
The maximum number of inter-region multicast members supported by a multicast group created for a transit router | 15 | |
The maximum number of multicast groups that can be created in a multicast domain | 20 | |
The maximum bandwidth supported by a multicast group Note The bandwidth refers to the sum of the bandwidth that the multicast sources use to transmit packets to the multicast group and the bandwidth that the multicast group uses to transmit packets to the multicast members. | 10 Gbps |
Traffic scheduling
Item | Default value | Adjustable |
The maximum number of traffic classification rules supported by a transit router | 500 | No |
The maximum number of queues that can be created in a quality of service (QoS) policy | 64 | No |
Limits on Basic Edition transit routers
Network instance connections
Item | Default value | Adjustable |
The maximum number of network instances that can be attached to a transit router | 10 | No |
The number of Cloud Connect Network (CCN) instances that can be attached to a transit router | 1 | No |
The maximum number of inter-region connections supported by each pair of transit routers | 1 | No |
The maximum number of transit routers to which a VPC can be attached | 1 | No |
Routes
Item | Default value | Adjustable |
The maximum number of route tables supported by a transit router | 1 | No |
The maximum number of route entries supported by a transit router | 100 | No |
Routing policies | ||
The maximum number of routing policies in the inbound direction that can be created on a transit router | 100 | No |
The maximum number of routing policies in the outbound direction that can be created on a transit router | 100 | No |