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Answer: Configure an egress-only internet gateway; create a default route in private subnet route tables pointing to it.
For IPv6 outbound from private subnets, use Egress-Only Internet Gateway (EGW) which is IPv6 only, no inbound. Route ::/0 to it in private route tables. NAT Gateway supports IPv4, there's no IPv6 NAT; IGW for public IPv6.
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A VPC has IPv4 configuration with public and private subnets. After adding IPv6, public subnets work but private subnets don't allow outbound internet IPv6 connections. What should be done?
A
Configure an egress-only internet gateway; create a default route in private subnet route tables pointing to it.
B
Turn on IPv6 NAT on NAT gateways; point default route in private subnets to NAT gateways.
C
Configure a new IPv6-only NAT gateway; point default route in private subnets to it.
D
Create a default route in private subnet route tables pointing to the existing internet gateway.
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