Parameter | Description |
Resource Group | Select the resource group to which the VPC belongs. |
Tag Key | Select or enter a tag key. You can specify up to 20 tag keys. A tag key can be up to 128 characters in length and cannot contain http:// or https:// . It cannot start with acs: or aliyun . |
Tag Value | Select or enter a tag value. You can specify up to 20 tag values. A tag value can be up to 128 characters in length and cannot contain http:// or https:// . It cannot start with acs: or aliyun . |
VPC | Select the VPC for which you want to create the vSwitch. |
IPv4 CIDR Block | The IPv4 CIDR block of the selected VPC is displayed. If the VPC has a secondary IPv4 CIDR block, you can specify the primary or secondary IPv4 CIDR block as the CIDR block of the vSwitch based on your business requirements. |
IPv6 CIDR Block | Select the IPv6 CIDR block of the VPC from the drop-down list. If you select Do Not Assign, IPv6 is disabled for the vSwitch. Note Only the following regions support IPv6 CIDR blocks: China (Qingdao), China (Beijing), China (Zhangjiakou), China (Hohhot), China (Ulanqab), China (Hangzhou), China (Shanghai), China (Fuzhou - Local Region), China (Shenzhen), China (Heyuan), China (Guangzhou), China (Chengdu), China (Hong Kong), Philippines (Manila), Singapore, Japan (Tokyo), South Korea (Seoul), Indonesia (Jakarta), Malaysia (Kuala Lumpur), Thailand (Bangkok), US (Virginia), US (Silicon Valley), Germany (Frankfurt), and SAU (Riyadh - Partner Region). If IPv6 is disabled for the VPC, click Enable IPv6. After IPv6 is enabled, the system automatically creates an IPv6 gateway free of charge.
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vSwitch |
Name | Enter a name for the vSwitch. |
Zone | In the drop-down list, select a zone for the vSwitch. In the same VPC, vSwitches in different zones can communicate with each other. The drop-down list shows whether Elastic Compute Service (ECS) instances, ApsaraDB RDS instances, internal-facing Classic Load Balancer (CLB) instances, and internal-facing Application Load Balancer (ALB) instances are supported in each zone. The supported cloud resources vary based on the zone and the creation time of the cloud resources. The instances provided in this topic are for reference only. The actual instances on the buy page shall prevail. |
IPv4 CIDR Block | Enter an IPv4 CIDR block for the vSwitch. When you specify a CIDR block for the vSwitch, take note of the following limits: The CIDR block of a vSwitch must be a subset of the CIDR block of the VPC to which the vSwitch belongs. For example, if the CIDR block of a VPC is 192.168.0.0/16, the CIDR block of a vSwitch in the VPC can range from 192.168.0.0/17 to 192.168.0.0/29. 100.64.0.0/10 is reserved by Alibaba Cloud. Therefore, 100.64.0.0/10 and its subnets cannot be used as the IPv4 CIDR block of the vSwitch. The first IP address and the last three IP addresses of a vSwitch CIDR block are reserved. For example, if a vSwitch CIDR block is 192.168.1.0/24, the IP addresses 192.168.1.0, 192.168.1.253, 192.168.1.254, and 192.168.1.255 are reserved. If a vSwitch is required to communicate with vSwitches in other VPCs or with data centers, make sure that the CIDR block of the vSwitch does not overlap with the destination CIDR blocks.
Note After the vSwitch is created, you cannot modify its CIDR block. |
IPv6 CIDR Block | Enable IPv6 and configure an IPv6 CIDR block for the vSwitch. Note If your VPC is assigned an IPv6 CIDR block, you must configure the IPv6 CIDR block of the vSwitch. If your VPC is not assigned an IPv6 CIDR block, you do not need to configure the IPv6 CIDR block of the vSwitch.
By default, the subnet mask of the IPv6 CIDR block for the vSwitch is /64. You can enter a decimal number from 0 to 255 to define the last 8 bits of the IPv6 CIDR block. For example, if the IPv6 CIDR block of the VPC is 2408:XXXX:XXXX:6e00::/56, you can enter 255 (ff in hexadecimal format) for the IPv6 CIDR block of the vSwitch. In this case, the IPv6 CIDR block of the vSwitch is 2408:XXXX:XXXX:6eff::/64. The first IPv6 address and last nine IPv6 addresses are reserved by the system. For example, if the IPv6 CIDR block of a vSwitch is 2408:XXXX:XXXX:6eff::/64, the first IPv6 address 2408:XXXX:XXXX:6eff:: and the last nine IPv6 addresses are reserved by the system: 2408:XXXX:XXXX:6eff:ffff:ffff:ffff:fff7, 2408:XXXX:XXXX:6eff:ffff:ffff:ffff:fff8, 2408:XXXX:XXXX:6eff:ffff:ffff:ffff:fff9, 2408:XXXX:XXXX:6eff:ffff:ffff:ffff:fffa, 2408:XXXX:XXXX:6eff:ffff:ffff:ffff:fffb, 2408:XXXX:XXXX:6eff:ffff:ffff:ffff:fffc, 2408:XXXX:XXXX:6eff:ffff:ffff:ffff:fffd, 2408:XXXX:XXXX:6eff:ffff:ffff:ffff:fffe, and 2408:XXXX:XXXX:6eff:ffff:ffff:ffff:ffff.
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