This topic describes the limits on IPv6 gateways.

Limits on IPv6 gateways

  • Only one IPv6 gateway can be deployed in each virtual private cloud (VPC).
  • After you enable IPv6 for a VPC, the system allocates an IPv6 CIDR block to the VPC. You cannot disassociate the IPv6 CIDR block from the VPC.
  • After you enable IPv6 for a vSwitch, the system allocates an IPv6 CIDR block to the vSwitch. You cannot disassociate the IPv6 CIDR block from the vSwitch.
  • Before you delete an IPv6 gateway, make sure that you have removed all public bandwidth plans and egress-only rules associated with the IPv6 addresses of the IPv6 gateway.
  • Before you delete a VPC, make sure that no IPv6 gateway is deployed in the VPC.
  • You can add only custom routes whose destination CIDR block is ::/0 and next hop is an IPv6 gateway to a VPC.

Egress-only rules

Before you create an egress-only rule for an IPv6 gateway, make sure that you have purchased a public bandwidth plan for the IPv6 address in the egress-only rule.

The following table describes the number of egress-only rules supported by IPv6 gateways of different editions.
Edition Number of egress-only rules
Free Edition 0
Enterprise Edition 50
Enhanced Enterprise Edition 200

Limits on public bandwidth

The following tables describe the bandwidth limits on different IPv6 gateway editions.

Table 1. Bandwidth limits (pay-by-bandwidth)
Edition Bandwidth limit
Free Edition 2 Gbps
Enterprise Edition 2 Gbps
Enhanced Enterprise Edition 2 Gbps
Table 2. Bandwidth limits (pay-by-data-transfer)
Edition Bandwidth limit
Free Edition 200 Mbps
Enterprise Edition 500 Mbps
Enhanced Enterprise Edition 1 Gbps

Throughput capacities of IPv6 gateways

IPv6 traffic that passes through an IPv6 gateway is throttled based on the bandwidth limit and throughput capacity of the IPv6 gateway.
  • If the sum of the bandwidth limits of all IPv6 addresses assigned to the IPv6 gateway does not exceed the throughput capacity of the IPv6 gateway, the IPv6 traffic that passes through the IPv6 gateway does not exceed the sum of the bandwidth limits.
  • If the sum of the bandwidth limits of all IPv6 addresses assigned to the IPv6 gateway exceeds the throughput capacity of the IPv6 gateway, the IPv6 traffic that passes through the IPv6 gateway does not exceed the throughput capacity of the IPv6 gateway.
The following table describes the throughput capacities of IPv6 gateways of different editions.
Edition Throughput capacity
Free Edition 10 Gbps
Enterprise Edition 20 Gbps
Enhanced Enterprise Edition 50 Gbps