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 |
Maximum number of CEN instances that each Alibaba Cloud account can create | 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 |
Maximum number of CIDR blocks that can be added to a transit router | 5 | No |
Network instance connections
Item | Default value | Adjustable |
Maximum bandwidth supported by each virtual private cloud (VPC) connection, Express Connect Router (ECR) connection, VPN connection, or virtual border router (VBR) connection | 50 Gbit/s in China (Hangzhou), China (Shanghai), China (Beijing), China (Shenzhen), China (Hong Kong) and Singapore. 10 Gbit/s in other regions. | No |
VPC connections | ||
Maximum number of VPCs that can be attached to a transit router | 1,000 | No |
Maximum number of transit routers to which a VPC can be attached | 5 | You can use one of the following methods to increase the quota:
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VBR connections | ||
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 | ||
Maximum number of IPsec-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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Maximum number of transit routers to which an IPsec-VPN connection can be attached | 1 | No |
Maximum number of VPN connections supported by a transit router for equal-cost multi-path (ECMP) routing | 16 | No |
Inter-region connections | ||
Maximum number of inter-region connections supported by each pair of transit routers | 1 | No |
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 in the Chinese mainland | 1000 Mbps | You can use one of the following methods to increase the quota:
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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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Maximum bandwidth supported by an inter-region connection when the bandwidth allocation mode for the inter-region connection is pay-as-you-go and one of the regions connected by the inter-region connection is outside the Chinese mainland and the other is in the Chinese mainland | 100 Mbps | You can use one of the following methods to increase the quota:
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ECR connections | For more information, see Express Connect quotas. | |
Routes
Item | Default value | Adjustable |
Route tables of transit routers | ||
Maximum number of route tables supported by a transit router | 20 | No |
Route entries of transit routers | ||
Maximum number of routes supported by each transit router route table Important The total number of routes of all route tables of a transit router cannot exceed 40,000. | 10,000 | No |
Maximum number of routes supported by each transit router | 40,000 | No |
Route synchronization | ||
Maximum number of VPCs with which a transit router can synchronize routes | 50 | No |
Aggregate routes | ||
Maximum number of aggregate routes supported by each transit router route table | 20 | No |
Routing policies | ||
Maximum number of routing policies in the inbound direction that can be created on a transit router | 100 | No |
Maximum number of routing policies in the outbound direction that can be created on a transit router | 100 | No |
Multicast
Item | Default value | Adjustable |
Maximum number of multicast domains supported by a transit router | 20 | No |
Maximum number of multicast domains that a VPC can associate with Note The total number of multicast domains that all vSwitches in a VPC can associate cannot exceed the quota. | 20 | |
Maximum number of static or dynamic (IGMP) multicast sources and members supported by each transit router | 2,000 | You can use one of the following methods to increase the quota:
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Maximum number of static or dynamic (IGMP) multicast members in a multicast group created for a transit router | 100 | No |
Maximum number of vSwitches that can be associated with a multicast domain created for a transit router | 10 | |
Maximum number of static or dynamic (IGMP) multicast sources that can be added to a multicast group created for a transit router | 100 | |
Maximum number of inter-region multicast members supported by a multicast group created for a transit router | 15 | |
Maximum number of multicast groups that can be created in a multicast domain | 20 (Closing Down) | |
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 |
Maximum number of traffic classification rules supported by a transit router | 500 | No |
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 |
Maximum number of network instances that can be attached to a transit router | 10 | No |
Maximum number of Cloud Connect Network (CCN) instances that can be attached to a transit router | 1 | No |
Maximum number of inter-region connections supported by each pair of transit routers | 1 | No |
Maximum number of transit routers to which a VPC can be attached | 1 | No |
Routes
Item | Default value | Adjustable |
Maximum number of route tables supported by a transit router | 1 | No |
Maximum number of routes supported by a transit router | 100 | No |
Routing policies | ||
Maximum number of routing policies in the inbound direction that can be created on a transit router | 100 | No |
Maximum number of routing policies in the outbound direction that can be created on a transit router | 100 | No |