使用企业版转发路由器实现跨地域VPC间的IPv6网络通信

控制台

Terraform

您可以使用Terraform搭建本文示例环境，关于Terraform的安装和配置，请参考Provider 使用。

下面步骤以Linux主机运行Terraform v1.9.8为例进行介绍，操作前请确保您已经完成Terraform 身份认证。

第一步：创建资源

1. 为本文的实践场景创建一个目录，并进入该目录。

   mkdir tf-CenIpv6 && cd tf-CenIpv6

2. 创建一个main.tf文件，用于定义资源信息。

   touch main.tf

3. 打开main.tf文件，复制如下代码，粘贴到文件中并保存。此文件包含了本文实践场景中需要用到的资源和对应配置。

   variable "pname" {
     description = "The prefix name for resources"
     type        = string
     default     = "tf-CenIpv6"
   }
   
   variable "default_region_id" {
     description = "The default region id"
     type        = string
     default     = "cn-hangzhou"
   }
   
   variable "hangzhou_region_id" {
     description = "The hangzhou region id"
     type        = string
     default     = "cn-hangzhou"
   }
   
   variable "shanghai_region_id" {
     description = "The shanghai region id"
     type        = string
     default     = "cn-shanghai"
   }
   
   variable "hangzhou_az_list" {
     description = "List of availability zones to use"
     type        = list(string)
     default     = ["cn-hangzhou-j", "cn-hangzhou-k"]
   }
   
   variable "shanghai_az_list" {
     description = "List of availability zones to use"
     type        = list(string)
     default     = ["cn-shanghai-m", "cn-shanghai-n"]
   }
   
   # --- provider ---
   provider "alicloud" { # default hangzhou
     region = var.default_region_id
   }
   
   provider "alicloud" {
     alias  = "hangzhou"
     region = var.hangzhou_region_id
   }
   
   provider "alicloud" {
     alias  = "shanghai"
     region = var.shanghai_region_id
   }
   
   # --- 2 vpc and 4 vsw ---
   resource "alicloud_vpc" "vpc1" {
     provider    = alicloud.hangzhou
     vpc_name    = "${var.pname}-vpc1"
     cidr_block  = "10.0.0.0/16"
     enable_ipv6 = true
   }
   resource "alicloud_vpc" "vpc2" {
     provider    = alicloud.shanghai
     vpc_name    = "${var.pname}-vpc2"
     cidr_block  = "172.16.0.0/16"
     enable_ipv6 = true
   }
   resource "alicloud_vswitch" "vsw1-1" {
     provider             = alicloud.hangzhou
     vpc_id               = alicloud_vpc.vpc1.id
     cidr_block           = "10.0.0.0/24"
     zone_id              = var.hangzhou_az_list[0]
     vswitch_name         = "${var.pname}-vsw1-1"
     enable_ipv6          = true
     ipv6_cidr_block_mask = 1 # existed
   }
   resource "alicloud_vswitch" "vsw1-2" {
     provider             = alicloud.hangzhou
     vpc_id               = alicloud_vpc.vpc1.id
     cidr_block           = "10.0.1.0/24"
     zone_id              = var.hangzhou_az_list[1]
     vswitch_name         = "${var.pname}-vsw1-2"
     enable_ipv6          = true
     ipv6_cidr_block_mask = 2
   }
   resource "alicloud_vswitch" "vsw2-1" {
     provider             = alicloud.shanghai
     vpc_id               = alicloud_vpc.vpc2.id
     cidr_block           = "172.16.0.0/24"
     zone_id              = var.shanghai_az_list[0]
     vswitch_name         = "${var.pname}-vsw2-1"
     enable_ipv6          = true
     ipv6_cidr_block_mask = 3
   }
   resource "alicloud_vswitch" "vsw2-2" {
     provider             = alicloud.shanghai
     vpc_id               = alicloud_vpc.vpc2.id
     cidr_block           = "172.16.1.0/24"
     zone_id              = var.shanghai_az_list[1]
     vswitch_name         = "${var.pname}-vsw2-2"
     enable_ipv6          = true
     ipv6_cidr_block_mask = 4
   }
   
   # --- ecs1 ---
   resource "alicloud_instance" "ecs1" {
     provider             = alicloud.hangzhou
     instance_name        = "${var.pname}-ecs1"
     instance_type        = "ecs.e-c1m1.large"
     security_groups      = [alicloud_security_group.sg1.id]
     vswitch_id           = alicloud_vswitch.vsw1-1.id
     image_id             = "aliyun_3_x64_20G_qboot_alibase_20230727.vhd"
     system_disk_category = "cloud_essd"
     private_ip           = "10.0.0.1"
     ipv6_address_count   = 1
     instance_charge_type = "PostPaid"
     user_data = base64encode(<<-EOT
       #!/bin/bash
       echo ecs_ok > /root/ok.txt
       sudo acs-plugin-manager --exec --plugin=ecs-utils-ipv6
     EOT
     )
   }
   
   # --- ecs2 ---
   resource "alicloud_instance" "ecs2" {
     provider             = alicloud.shanghai
     instance_name        = "${var.pname}-ecs2"
     instance_type        = "ecs.e-c1m1.large"
     security_groups      = [alicloud_security_group.sg2.id]
     vswitch_id           = alicloud_vswitch.vsw2-1.id
     image_id             = "aliyun_3_x64_20G_qboot_alibase_20230727.vhd"
     system_disk_category = "cloud_essd"
     private_ip           = "172.16.0.1"
     ipv6_address_count   = 1
     instance_charge_type = "PostPaid"
     user_data = base64encode(<<-EOT
       #!/bin/bash
       echo ecs_ok > /root/ok.txt
       sudo acs-plugin-manager --exec --plugin=ecs-utils-ipv6
     EOT
     )
   }
   
   # sg
   resource "alicloud_security_group" "sg1" {
     provider = alicloud.hangzhou
     name     = "${var.pname}-sg1"
     vpc_id   = alicloud_vpc.vpc1.id
   }
   resource "alicloud_security_group_rule" "allow_inbound_ssh1" {
     provider          = alicloud.hangzhou
     type              = "ingress"
     ip_protocol       = "tcp"
     nic_type          = "intranet"
     policy            = "accept"
     port_range        = "22/22"
     priority          = 1
     security_group_id = alicloud_security_group.sg1.id
     cidr_ip           = "0.0.0.0/0"
   }
   resource "alicloud_security_group_rule" "allow_inbound_icmp1" {
     provider          = alicloud.hangzhou
     type              = "ingress"
     ip_protocol       = "icmp"
     nic_type          = "intranet"
     policy            = "accept"
     port_range        = "-1/-1"
     priority          = 1
     security_group_id = alicloud_security_group.sg1.id
     cidr_ip           = "0.0.0.0/0"
   }
   resource "alicloud_security_group_rule" "allow_inbound_ipv6_icmp1" {
     provider          = alicloud.hangzhou
     type              = "ingress"
     ip_protocol       = "all"
     nic_type          = "intranet"
     policy            = "accept"
     port_range        = "-1/-1"
     priority          = 1
     security_group_id = alicloud_security_group.sg1.id
     ipv6_cidr_ip      = "::/0"
   }
   
   resource "alicloud_security_group" "sg2" {
     provider = alicloud.shanghai
     name     = "${var.pname}-sg2"
     vpc_id   = alicloud_vpc.vpc2.id
   }
   resource "alicloud_security_group_rule" "allow_inbound_ssh2" {
     provider          = alicloud.shanghai
     type              = "ingress"
     ip_protocol       = "tcp"
     nic_type          = "intranet"
     policy            = "accept"
     port_range        = "22/22"
     priority          = 1
     security_group_id = alicloud_security_group.sg2.id
     cidr_ip           = "0.0.0.0/0"
   }
   resource "alicloud_security_group_rule" "allow_inbound_icmp2" {
     provider          = alicloud.shanghai
     type              = "ingress"
     ip_protocol       = "icmp"
     nic_type          = "intranet"
     policy            = "accept"
     port_range        = "-1/-1"
     priority          = 1
     security_group_id = alicloud_security_group.sg2.id
     cidr_ip           = "0.0.0.0/0"
   }
   resource "alicloud_security_group_rule" "allow_inbound_ipv6_icmp2" {
     provider = alicloud.shanghai
   
     type              = "ingress"
     ip_protocol       = "all"
     nic_type          = "intranet"
     policy            = "accept"
     port_range        = "-1/-1"
     priority          = 1
     security_group_id = alicloud_security_group.sg2.id
     ipv6_cidr_ip      = "::/0"
   }
   
   
   # --- cen and tr ---
   resource "alicloud_cen_instance" "cen1" {
     cen_instance_name = "${var.pname}-cen1"
   }
   resource "alicloud_cen_transit_router" "tr1" {
     provider            = alicloud.hangzhou
     transit_router_name = "${var.pname}-tr1"
     cen_id              = alicloud_cen_instance.cen1.id
   }
   resource "alicloud_cen_transit_router" "tr2" {
     provider            = alicloud.shanghai
     transit_router_name = "${var.pname}-tr2"
     cen_id              = alicloud_cen_instance.cen1.id
   }
   # get tr sys table id
   data "alicloud_cen_transit_router_route_tables" "tr1" { # get tr sys table
     transit_router_id               = alicloud_cen_transit_router.tr1.transit_router_id
     transit_router_route_table_type = "System"
   }
   data "alicloud_cen_transit_router_route_tables" "tr2" {
     transit_router_id               = alicloud_cen_transit_router.tr2.transit_router_id
     transit_router_route_table_type = "System"
   }
   
   # tr-peer
   resource "alicloud_cen_transit_router_peer_attachment" "peer" {
     provider                      = alicloud.hangzhou
     cen_id                        = alicloud_cen_instance.cen1.id
     transit_router_id             = alicloud_cen_transit_router.tr1.transit_router_id
     peer_transit_router_region_id = var.shanghai_region_id
     peer_transit_router_id        = alicloud_cen_transit_router.tr2.transit_router_id
     bandwidth_type                = "DataTransfer"
     bandwidth                     = 1
     auto_publish_route_enabled    = true # default is false
   }
   resource "alicloud_cen_transit_router_route_table_association" "ass_peer1" {
     transit_router_route_table_id = data.alicloud_cen_transit_router_route_tables.tr1.tables[0].id
     transit_router_attachment_id  = alicloud_cen_transit_router_peer_attachment.peer.transit_router_attachment_id
   }
   resource "alicloud_cen_transit_router_route_table_propagation" "propa_peer1" {
     transit_router_route_table_id = data.alicloud_cen_transit_router_route_tables.tr1.tables[0].id
     transit_router_attachment_id  = alicloud_cen_transit_router_peer_attachment.peer.transit_router_attachment_id
   }
   resource "alicloud_cen_transit_router_route_table_association" "ass_peer2" {
     transit_router_route_table_id = data.alicloud_cen_transit_router_route_tables.tr2.tables[0].id
     transit_router_attachment_id  = alicloud_cen_transit_router_peer_attachment.peer.transit_router_attachment_id
   }
   resource "alicloud_cen_transit_router_route_table_propagation" "propa_peer2" {
     transit_router_route_table_id = data.alicloud_cen_transit_router_route_tables.tr2.tables[0].id
     transit_router_attachment_id  = alicloud_cen_transit_router_peer_attachment.peer.transit_router_attachment_id
   }
   
   # cidr_list
   variable "cidr_list" {
     description = "The list of Private CIDR block"
     type        = list(string)
     default     = ["10.0.0.0/8", "172.16.0.0/12", "192.168.0.0/16"]
   }
   
   # attach1
   resource "alicloud_cen_transit_router_vpc_attachment" "attach1" {
     provider          = alicloud.hangzhou
     cen_id            = alicloud_cen_instance.cen1.id
     transit_router_id = alicloud_cen_transit_router.tr1.transit_router_id
     vpc_id            = alicloud_vpc.vpc1.id
     zone_mappings {
       zone_id    = var.hangzhou_az_list[0]
       vswitch_id = alicloud_vswitch.vsw1-1.id
     }
     zone_mappings {
       zone_id    = var.hangzhou_az_list[1]
       vswitch_id = alicloud_vswitch.vsw1-2.id
     }
     transit_router_vpc_attachment_name    = "attach1"
     transit_router_vpc_attachment_options = { ipv6Support : "enable" }
     auto_publish_route_enabled            = true # default is false
   }
   resource "alicloud_cen_transit_router_route_table_association" "ass1" {
     transit_router_route_table_id = data.alicloud_cen_transit_router_route_tables.tr1.tables[0].id
     transit_router_attachment_id  = alicloud_cen_transit_router_vpc_attachment.attach1.transit_router_attachment_id
   }
   resource "alicloud_cen_transit_router_route_table_propagation" "propa1" {
     transit_router_route_table_id = data.alicloud_cen_transit_router_route_tables.tr1.tables[0].id
     transit_router_attachment_id  = alicloud_cen_transit_router_vpc_attachment.attach1.transit_router_attachment_id
   }
   resource "alicloud_route_entry" "vpc1_to_tr1" {
     provider              = alicloud.hangzhou
     count                 = 3
     route_table_id        = alicloud_vpc.vpc1.route_table_id
     destination_cidrblock = var.cidr_list[count.index]
     nexthop_type          = "Attachment"
     nexthop_id            = alicloud_cen_transit_router_vpc_attachment.attach1.transit_router_attachment_id
   }
   
   # attach2
   resource "alicloud_cen_transit_router_vpc_attachment" "attach2" {
     provider          = alicloud.shanghai
     cen_id            = alicloud_cen_instance.cen1.id
     transit_router_id = alicloud_cen_transit_router.tr2.transit_router_id
     vpc_id            = alicloud_vpc.vpc2.id
     zone_mappings {
       zone_id    = var.shanghai_az_list[0]
       vswitch_id = alicloud_vswitch.vsw2-1.id
     }
     zone_mappings {
       zone_id    = var.shanghai_az_list[1]
       vswitch_id = alicloud_vswitch.vsw2-2.id
     }
     transit_router_vpc_attachment_name    = "attach2"
     transit_router_vpc_attachment_options = { ipv6Support : "enable" }
     auto_publish_route_enabled            = true # default is false
   }
   resource "alicloud_cen_transit_router_route_table_association" "ass2" {
     transit_router_route_table_id = data.alicloud_cen_transit_router_route_tables.tr2.tables[0].id
     transit_router_attachment_id  = alicloud_cen_transit_router_vpc_attachment.attach2.transit_router_attachment_id
   }
   resource "alicloud_cen_transit_router_route_table_propagation" "propa2" {
     transit_router_route_table_id = data.alicloud_cen_transit_router_route_tables.tr2.tables[0].id
     transit_router_attachment_id  = alicloud_cen_transit_router_vpc_attachment.attach2.transit_router_attachment_id
   }
   resource "alicloud_route_entry" "vpc2_to_tr2" {
     provider              = alicloud.shanghai
     count                 = 3
     route_table_id        = alicloud_vpc.vpc2.route_table_id
     destination_cidrblock = var.cidr_list[count.index]
     nexthop_type          = "Attachment"
     nexthop_id            = alicloud_cen_transit_router_vpc_attachment.attach2.transit_router_attachment_id
   }
   
   output "ecs1_login_address" {
     value = "https://ecs-workbench.aliyun.com/?from=EcsConsole&instanceType=ecs&regionId=${var.hangzhou_region_id}&instanceId=${alicloud_instance.ecs1.id}"
   }
   
   output "ecs2_login_address" {
     value = "https://ecs-workbench.aliyun.com/?from=EcsConsole&instanceType=ecs&regionId=${var.shanghai_region_id}&instanceId=${alicloud_instance.ecs2.id}"
   }

4. 初始化目录，完成Terraform的初始化配置。

   terraform init

5. 创建资源。执行后Terraform会先预览将要创建的资源，确认无误后，输入yes正式开始创建。

   terraform apply

第二步：验证测试

完成上述步骤后，VPC1和VPC2之间已经可以实现IPv6网络通信了。以下内容介绍如何测试VPC实例间的IPv6网络连通性。

1. 登录ECS2实例（实例名称为tf-CenIpv6-ecs2）。

   您可以在Terraform的Outputs输出中，找到ECS2的登录地址并复制到浏览器打开，登录时注意认证方式选择临时SSH密钥认证。

   

2. 在ECS2实例中，输入如下命令查看ECS2的IPv6地址

   ifconfig

   

3. 登录ECS1实例（实例名称为tf-CenIpv6-ecs1）。

   您可以在Terraform的Outputs输出中，找到ECS1的登录地址并复制到浏览器打开，登录时注意认证方式选择临时SSH密钥认证。

   

4. 执行以下命令，尝试使用ECS1的IPv6地址访问VPC2下的ECS3实例，验证通信是否正常。

   ping6 <ECS2的IPv6地址>

   

   如果ECS1可以收到如图所示的回复报文，则证明VPC实例之间已经可以进行IPv6网络通信了。

第三步：释放资源

验证完毕后，如果您不再使用资源，请执行以下命令释放资源，防止继续计费。

terraform destroy --auto-approve