Help Center/ Virtual Private Network/ FAQs/ FAQs - S2C Enterprise Edition VPN/ Subnet Configurations/ How Do I Plan CIDR Blocks for Access to a VPC Through a VPN Connection?
Updated on 2026-05-14 GMT+08:00
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How Do I Plan CIDR Blocks for Access to a VPC Through a VPN Connection?

  • The CIDR blocks of a VPC cannot conflict with on-premises CIDR blocks.
  • To avoid conflicts with cloud service addresses, do not use 127.0.0.0/8, 169.254.0.0/16, 224.0.0.0/3, 100.64.0.0/10, 100.64.0.0/12, and 214.0.0.0/8 for your on-premises network.

    If you need to use 100.64.0.0/10 or 100.64.0.0/12, submit a service ticket.

Parent topic: Subnet Configurations