This topic describes the limits on IPv6 gateways, including the limits on egress-only rules, limits on Internet bandwidth, and throttling of 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 Internet 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
::/0and next hop is an IPv6 gateway to a VPC.
Limits on egress-only rules
Before you create an egress-only rule for an IPv6 address, make sure that you have purchased Internet bandwidth for the IPv6 address.
Item | Default limit |
Egress-only rule | 200 |
Limits on Internet bandwidth
Item | Default limit |
Maximum bandwidth of a pay-by-bandwidth IPv6 gateway | 2,000 Mbit/s |
Maximum bandwidth of a pay-by-data-transfer IPv6 gateway | 1,000 Mbit/s |
Throttling of IPv6 gateways
Item | Default limit |
Throttling of a pay-by-data-transfer IPv6 gateway | For each Alibaba Cloud account, the sum of the maximum bandwidth of all pay-by-data-transfer IPv6 gateways in a region cannot exceed 5 Gbit/s. If your business requires guaranteed bandwidth or larger bandwidth, you can purchase pay-by-bandwidth IPv6 gateways. |
Throttling of a pay-by-bandwidth IPv6 gateway | For each Alibaba Cloud account, the sum of the maximum bandwidth of all pay-by-bandwidth IPv6 gateways in a region cannot exceed 50 Gbit/s. To increase the maximum bandwidth, submit a ticket or contact your account manager. |