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    Cloud Enterprise Network:Limits

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    Cloud Enterprise Network:Limits

    Last Updated:Oct 15, 2025

    This topic describes the limits of Cloud Enterprise Network (CEN) and explains how to request a quota increase.

    CEN instances

    Resource

    Default limit

    Request a quota increase

    Maximum number of CEN instances that can be created by each Alibaba Cloud account

    5

    You can request a quota increase in one of the following ways:

    Enterprise Edition transit routers

    Enterprise Edition transit router instances

    Resource

    Default limit

    Request a quota increase

    Maximum number of CIDR blocks for each transit router

    5

    Cannot be changed

    Network instance connections

    Resource

    Default limit

    Request a quota increase

    Maximum bandwidth of each network instance connection (VPC, ECR, VPN, or VBR connection)

    • 100 Gbps per zone in China (Hangzhou), China (Shanghai), China (Beijing), China (Shenzhen), China (Hong Kong), and Singapore.

    • 50 Gbps per zone in China (Guangzhou), China (Heyuan), , Indonesia (Jakarta), and Mexico.

    • 15 Gbps per zone in other regions.

    Cannot be changed

    VPC Connections

    Maximum number of virtual private clouds (VPCs) that can be connected to each transit router

    1,000

    Cannot be changed

    Maximum number of transit routers that can be connected to each VPC

    5

    You can request a quota increase in one of the following ways:

    VBR Connections

    Maximum number of virtual border router (VBR) instances that can be connected to each transit router

    32

    Cannot be changed

    VPN Connections

    Maximum number of VPN connections that can be created for each transit router

    50

    You can request a quota increase in one of the following ways:

    Maximum number of transit routers that can be connected to each IPsec-VPN connection

    1

    Cannot be changed

    Maximum number of VPN connections that support Equal-Cost Multi-Path (ECMP) routing for each transit router

    16

    Cannot be changed

    Inter-region Connections

    Maximum number of inter-region connections between each pair of transit routers

    1

    Cannot be changed

    Maximum inter-region communication bandwidth of each inter-region connection for communication between regions in the Chinese mainland if the bandwidth allocation mode is Pay-As-You-Go

    1,000 Mbps

    You can request a quota increase in one of the following ways:

    Maximum inter-region communication bandwidth of each inter-region connection for communication between regions outside the Chinese mainland if the bandwidth allocation mode is Pay-As-You-Go

    100 Mbps

    You can request a quota increase in one of the following ways:

    Maximum inter-region communication bandwidth of each inter-region connection for communication between a region in the Chinese mainland and a region outside the Chinese mainland if the bandwidth allocation mode is Pay-As-You-Go

    100 Mbps

    You can request a quota increase in one of the following ways:

    ECR (Express Connect Router) connections

    For information about ECR-related resource quotas, see Express Connect quotas.

    Routing

    Resource

    Default limit

    Request a quota increase

    Transit Router Route Tables

    Maximum number of route tables supported by each transit router

    50

    Cannot be changed

    Transit Router Route Entries

    Maximum number of route entries supported by each transit router route table

    Important

    The total number of route entries in all route tables of a transit router instance cannot exceed 40,000.

    10,000

    Cannot be changed

    Maximum number of route entries supported by each transit router instance

    40,000

    Cannot be changed

    Route Synchronization

    Maximum number of VPC-connected instances for which route synchronization can be enabled on each transit router

    50

    Cannot be changed

    Aggregate Routes

    Maximum number of aggregate routes that can be created in each transit router route table

    20

    Cannot be changed

    Routing Policies

    Maximum number of routing policies that can be created for each transit router in the inbound direction

    100

    Cannot be changed

    Maximum number of routing policies that can be created for each transit router in the outbound direction

    100

    Cannot be changed

    Multicast

    Resource

    Default limit

    Request a quota increase

    Maximum number of multicast domains that can be created for each transit router

    20

    Cannot be changed

    Maximum number of multicast domains that can be associated with each VPC

    Note

    The total number of multicast domains associated with all vSwitch instances in a VPC cannot exceed the requested quota.

    20

    Maximum number of static or dynamic (IGMP) multicast sources and members supported by each transit router

    2,000

    You can request a quota increase in one of the following ways:

    You can request to increase the quota to 3,000. If you need a higher quota, contact your business manager. The quota can be increased to a maximum of 10,000.

    Maximum number of static and dynamic (IGMP) multicast members in a single multicast group of a transit router

    100

    Cannot be changed

    Maximum number of vSwitches that can be associated with a single multicast domain of a transit router

    10

    Maximum number of static and dynamic (IGMP) multicast sources in a single multicast group of a transit router

    100

    Maximum number of inter-region multicast members that can be associated with a single multicast group of a transit router

    15

    Maximum number of multicast groups supported by each multicast domain

    20 (Deprecated)

    Maximum bandwidth of each multicast group

    Note

    This is the sum of the bandwidth consumed by traffic from all multicast sources to the multicast group and the bandwidth consumed by traffic from the multicast group to all multicast members.

    10 Gbps

    Traffic rerouting

    Resource

    Default limit

    Request a quota increase

    Maximum number of traffic classification rules that can be created for each transit router

    500

    Cannot be changed

    Maximum number of queues that can be created in each QoS policy

    64

    Cannot be changed

    Basic Edition transit routers

    Network instance connections

    Resource

    Default limit

    Request a quota increase

    Total number of VPC and VBR instances that can be connected to each transit router

    10

    Cannot be changed

    Maximum number of Cloud Connect Network (CCN) instances that can be connected to each transit router

    1

    Cannot be changed

    Maximum number of inter-region connections between each pair of transit routers

    1

    Cannot be changed

    Maximum number of transit routers that can be connected to each VPC

    1

    Cannot be changed

    Routing

    Resource

    Default limit

    Request a quota increase

    Maximum number of route tables supported by each transit router

    1

    Cannot be changed

    Maximum number of route entries supported on each transit router

    100

    Cannot be changed

    Routing Policies

    Maximum number of routing policies that can be created for each transit router in the inbound direction

    100

    Cannot be changed

    Maximum number of routing policies that can be created for each transit router in the outbound direction

    100

    Cannot be changed