changes from previous work

vpc/modules.tf

@@ -16,9 +16,10 @@ module "vpc" {
   # base CIDR for the VPC
   cidr = "${var.first-2-octets}.0.0/16"
 
-  #private_propagating_vgws = ["vgw-004d951e"]
-  #public_propagating_vgws = ["vgw-004d951e"]
+  #private_propagating_vgws = ["vgw-xxxxxxxx"]
+  #public_propagating_vgws = ["vgw-xxxxxxxx"]
 
   enable_nat_gateway = "true"
+  enable_ipv6_cidr_block = "true"
   azs                = ["${var.azs}"]
 }