Limitations - VPC Product Introduction| Alibaba Cloud Documentation Center

VPC

Items	Limitations	Ticket submission permits exemption
Available CIDR blocks	192.168.0.0/16，172.16.0.0/12，10.0.0.0/8, and their subsets	Supported
Maximum number of VPCs for an account	5	Supported
Maximum number of VRouters in a VPC	1	Unsupported
Maximum number of VSwitches in a VPC	24	Unsupported
Maximum number of route tables in a VPC	1	Unsupported
Maximum number of route entries in a route table	48	Supported
Maximum number of cloud product instances that can run in a VPC	10,000	Unsupported

Items	Limitations
VRouter	Each VPC can have only one VRouter. VRouter does not support dynamic route protocols, such as BGP or OSPF. Each VRouter has only one route table. Route entries in a route table affect all the cloud product instances in the VPC. Currently, the source IP routing rules are not supported by VSwitches and cloud product instances.
VSwitch	VSwitches are a layer-3 switch, therefore the layer-2 broadcast and multicast are not supported. The number of instances that a VSwitch can have = 10,000 - the number of existing instances in the VPC. The CIDR block cannot be modified.