# Amazon Direct Connect Resiliency Toolkit
Amazon offers customers the ability to achieve highly resilient network connections between Amazon Virtual Private Cloud (Amazon VPC) and their on-premises infrastructure. The Amazon Direct Connect Resiliency Toolkit provides a connection wizard with multiple resiliency models. These models help you to determine, and then place an order for the number of dedicated connections to achieve your SLA objective. You select a resiliency model, and then the Amazon Direct Connect Resiliency Toolkit guides you through the dedicated connection ordering process. The resiliency models are designed to ensure that you have the appropriate number of dedicated connections in multiple locations.
The Amazon Direct Connect Resiliency Toolkit has the following benefits:
+ Provides guidance on how you determine and then order the appropriate redundant Amazon Direct Connect dedicated connections.
+ Ensures that the redundant dedicated connections have the same speed.
+ Automatically configures the dedicated connection names.
+ Automatically approves your dedicated connections when you have an existing Amazon account and you select a known Amazon Direct Connect Partner. The Letter of Authority (LOA) is available for immediate download.
+ Automatically creates a support ticket for the dedicated connection approval when you are a new Amazon customer, or you select an unknown (**Other**) partner.
+ Provides an order summary for your dedicated connections, with the SLA that you can achieve and the port-hour cost for the ordered dedicated connections.
+ Creates link aggregation groups (LAGs), and adds the appropriate number of dedicated connections to the LAGs when you choose a speed other than 1 Gbps, 10 Gbps, 100 Gbps, or 400 Gbps.
+ Provides a LAG summary with the dedicated connection SLA that you can achieve, and the total port-hour cost for each ordered dedicated connection as part of the LAG.
+ Prevents you from terminating the dedicated connections on the same Amazon Direct Connect device.
+ Provides a way for you to test your configuration for resiliency. You work with Amazon to bring down the BGP peering session in order to verify that traffic routes to one of your redundant virtual interfaces. For more information, see [Amazon Direct Connect Failover Test](resiliency_failover.md).
+ Provides Amazon CloudWatch metrics for connections and virtual interfaces. For more information, see [Monitor Amazon Direct Connect resources](monitoring-overview.md).
After you select the resiliency model, the Amazon Direct Connect Resiliency Toolkit steps you through the following procedures:
+ Selecting the number of dedicated connections
+ Selecting the connection capacity, and the dedicated connection location
+ Ordering the dedicated connections
+ Verifying that the dedicated connections are ready to use
+ Downloading your Letter of Authority (LOA-CFA) for each dedicated connection
+ Verifying that your configuration meets your resiliency requirements
## Available resiliency models
The following resiliency models are available in the Amazon Direct Connect Resiliency Toolkit:
+ **Maximum resiliency**: This model provides you a way to order dedicated connections to achieve an SLA of 99.99%. It requires you to meet all of the requirements for achieving the SLA that are specified in the [Amazon Direct Connect Service Level Agreement](https://aws.amazon.com/directconnect/sla/).
+ **High resiliency**: This model provides you a way to order dedicated connections to achieve an SLA of 99.9%. It requires you to meet all of the requirements for achieving the SLA that are specified in the [Amazon Direct Connect Service Level Agreement](https://aws.amazon.com/directconnect/sla/).
+ **Development and test**: This model provides you a way to achieve development and test resiliency for non-critical workloads, by using separate connections that terminate on separate devices in one location.
The best practice is to use the **Connection wizard** in the Amazon Direct Connect Resiliency Toolkit to order to achieve your SLA objective.
**Note**
If you do not want to create a resiliency model using the Amazon Direct Connect Resiliency Toolkit, you can create a Classic connection. For more information about Classic connections, see [Classic connection](classic_connection.md).
## Amazon Direct Connect Resiliency Toolkit prerequisites
Note the following information before you begin your configuration:
+ Familiarize yourself with the [Connection prerequisites](connection_options.md#connect-prereqs.title).
+ The available resiliency model that you want to use.
## Maximum resiliency
You can achieve maximum resiliency for critical workloads by using separate connections that terminate on separate devices in more than one location (as shown in the following figure). This model provides resiliency against device, connectivity, and complete location failures. The following figure shows both connections from each customer data center going to the same Amazon Direct Connect locations. You can optionally have each connection from a customer data center going to different locations.
![\[Maximum resiliency model\]](http://docs.amazonaws.cn/en_us/directconnect/latest/UserGuide/images/dc-max-resiliency.png)
For the procedure for using the Amazon Direct Connect Resiliency Toolkit to configure a maximum resiliency model, see [Configure maximum resiliency](max-resiliency-set-up.md).
## High resiliency
You can achieve high resiliency for critical workloads by using two single connections to multiple locations (as shown in the following figure). This model provides resiliency against connectivity failures caused by a fiber cut or a device failure. It also helps prevent a complete location failure.
![\[High resiliency model\]](http://docs.amazonaws.cn/en_us/directconnect/latest/UserGuide/images/dc-high-resiliency.png)
For the procedure for using the Amazon Direct Connect Resiliency Toolkit to configure a high resiliency model, see [Configure high resiliency](high-resiliency-set-up.md).
## Development and test
You can achieve development and test resiliency for non-critical workloads by using separate connections that terminate on separate devices in one location (as shown in the following figure). This model provides resiliency against device failure, but does not provide resiliency against location failure.
![\[Development and Test Model\]](http://docs.amazonaws.cn/en_us/directconnect/latest/UserGuide/images/dc-devtest.png)
For the procedure for using the Amazon Direct Connect Resiliency Toolkit to configure a maximum resiliency model, see [Configure development and test resiliency](devtest-resiliency-set-up.md).
## Amazon Direct Connect FailoverTest
Use the Amazon Direct Connect Resiliency Toolkit to verify traffic routes and that those routes meet your resiliency requirements.
For the procedures for using the Amazon Direct Connect Resiliency Toolkit to perform failover tests, see [Direct Connect failover test](resiliency_failover.md).
# Configure Direct Connect for maximum resiliency with the Amazon Direct Connect Resiliency Toolkit
In this example, the Amazon Direct Connect Resiliency Toolkit is used to configure a maximum resiliency model
**Topics**
+ [Step 1: Sign up for Amazon](#max-resiliency-signup)
+ [Step 2: Configure the resiliency model](#max-resiliency-select-model)
+ [Step 3: Create your virtual interfaces](#max-resiliency-createvirtualinterface)
+ [Step 4: Verify your virtual interface resiliency configuration](#max-resiliency-failover)
+ [Step 5: Verify your virtual interfaces connectivity](#max-resiliency-connected)
## Step 1: Sign up for Amazon
To use Amazon Direct Connect, you need an Amazon account if you don't already have one.
### Sign up for an Amazon Web Services account
If you do not have an Amazon Web Services account, use the following procedure to create one.
**To sign up for Amazon Web Services**
1. Open [http://www.amazonaws.cn/](http://www.amazonaws.cn/) and choose **Sign Up**.
1. Follow the on-screen instructions.
Amazon sends you a confirmation email after the sign-up process is complete. At any time, you can view your current account activity and manage your account by going to [http://www.amazonaws.cn/](http://www.amazonaws.cn/) and choosing **My Account**.
### Secure IAM users
After you sign up for an Amazon Web Services account, safeguard your administrative user by turning on multi-factor authentication (MFA). For instructions, see [Enable a virtual MFA device for an IAM user (console)](https://docs.amazonaws.cn/IAM/latest/UserGuide/id_credentials_mfa_enable_virtual.html#enable-virt-mfa-for-iam-user) in the *IAM User Guide*.
To give other users access to your Amazon Web Services account resources, create IAM users. To secure your IAM users, turn on MFA and only give the IAM users the permissions needed to perform their tasks.
For more information about creating and securing IAM users, see the following topics in the *IAM User Guide*:
+ [Creating an IAM user in your Amazon Web Services account](https://docs.amazonaws.cn//IAM/latest/UserGuide/id_users_create.html)
+ [Access management for Amazon resources](https://docs.amazonaws.cn/IAM/latest/UserGuide/access.html)
+ [Example IAM identity-based policies](https://docs.amazonaws.cn/IAM/latest/UserGuide/access_policies_examples.html)
## Step 2: Configure the resiliency model
**To configure a maximum resiliency model**
1. Open the **Amazon Direct Connect** console at [https://console.amazonaws.cn/directconnect/v2/home](https://console.amazonaws.cn/directconnect/v2/home).
1. In the navigation pane, choose **Connections**, and then choose **Create a connection**.
1. Under **Connection ordering type**, choose **Connection wizard**.
1. Under **Resiliency level**, choose **Maximum Resiliency**, and then choose **Next**.
1. On the **Configure connections** pane, under **Connection settings,** do the following:
1. For **Bandwidth**, choose the dedicated connection bandwidth.
This bandwidth applies to all of the created connections.
1. For **First location service provider**, select the appropriate Amazon Direct Connect location for the dedicated connection.
1. If applicable, for **First Sub location**, choose the floor closest to you or your network provider. This option is only available if the location has meet-me rooms (MMRs) on multiple floors of the building.
1. If you selected **Other** for **First location service provider**, for **Name of other provider**, enter the name of the partner that you use.
1. For **Second location service provider**, select the appropriate Amazon Direct Connect location.
1. If applicable, for **Second Sub location**, choose the floor closest to you or your network provider. This option is only available if the location has meet-me rooms (MMRs) on multiple floors of the building.
1. If you selected **Other** for **Second location service provider**, for **Name of other provider**, enter the name of the partner that you use.
1. (Optional) Add or remove a tag.
[Add a tag] Choose **Add tag** and do the following:
+ For **Key**, enter the key name.
+ For **Value**, enter the key value.
[Remove a tag] Next to the tag, choose **Remove tag**.
1. Choose **Next**.
1. Review your connections, and then choose **Continue**.
If your LOAs are ready, you can choose **Download LOA**, and then click **Continue**.
It can take up to 72 business hours for Amazon to review your request and provision a port for your connection. During this time, you might receive an email with a request for more information about your use case or the specified location. The email is sent to the email address that you used when you signed up for Amazon. You must respond within 7 days or the connection is deleted.
## Step 3: Create your virtual interfaces
You can create a private virtual interface to connect to your VPC. Or, you can create a public virtual interface to connect to public Amazon services that aren't in a VPC. When you create a private virtual interface to a VPC, you need a private virtual interface for each VPC that you're connecting to. For example, you need three private virtual interfaces to connect to three VPCs.
Before you begin, ensure that you have the following information:
| Resource | Required information |
| --- | --- |
| Connection | The Amazon Direct Connect connection or link aggregation group (LAG) for which you are creating the virtual interface. |
| Virtual interface name | A name for the virtual interface. |
| Virtual interface owner | If you're creating the virtual interface for another account, you need the Amazon account ID of the other account. |
| (Private virtual interface only) Connection | For connecting to a VPC in the same Amazon Region, you need the virtual private gateway for your VPC. The ASN for the Amazon side of the BGP session is inherited from the virtual private gateway. When you create a virtual private gateway, you can specify your own private ASN. Otherwise, Amazon provides a default ASN. For more information, see [Create a Virtual Private Gateway](https://docs.amazonaws.cn/vpc/latest/userguide/SetUpVPNConnections.html#vpn-create-vpg) in the Amazon VPC User Guide. For connecting to a VPC through a Direct Connect gateway, you need the Direct Connect gateway. For more information, see [Direct Connect Gateways](https://docs.amazonaws.cn/directconnect/latest/UserGuide/direct-connect-gateways.html). |
| VLAN | A unique virtual local area network (VLAN) tag that's not already in use on your connection. The value must be between 1 and 4094 and must comply with the Ethernet 802.1Q standard. This tag is required for any traffic traversing the Amazon Direct Connect connection. If you have a hosted connection, your Amazon Direct Connect Partner provides this value. You can’t modify the value after you have created the virtual interface. |
| Peer IP addresses | A virtual interface can support a BGP peering session for IPv4, IPv6, or one of each (dual-stack). Do not use Elastic IPs (EIPs) or Bring your own IP addresses (BYOIP) from the Amazon Pool to create a public virtual interface. You cannot create multiple BGP sessions for the same IP addressing family on the same virtual interface. The IP address ranges are assigned to each end of the virtual interface for the BGP peering session. [\[See the AWS documentation website for more details\]](http://docs.amazonaws.cn/en_us/directconnect/latest/UserGuide/max-resiliency-set-up.html) |
| Address family | Whether the BGP peering session will be over IPv4 or IPv6. |
| BGP information | [\[See the AWS documentation website for more details\]](http://docs.amazonaws.cn/en_us/directconnect/latest/UserGuide/max-resiliency-set-up.html) |
| (Public virtual interface only) Prefixes you want to advertise | Public IPv4 routes or IPv6 routes to advertise over BGP. You must advertise at least one prefix using BGP, up to a maximum of 1,000 prefixes. [\[See the AWS documentation website for more details\]](http://docs.amazonaws.cn/en_us/directconnect/latest/UserGuide/max-resiliency-set-up.html) |
| (Private and transit virtual interfaces only) Jumbo frames | The maximum transmission unit (MTU) of packets over Amazon Direct Connect. The default is 1500. Setting the MTU of a virtual interface to 9001 (jumbo frames) can cause an update to the underlying physical connection if it wasn't updated to support jumbo frames. Updating the connection disrupts network connectivity for all virtual interfaces associated with the connection for up to 30 seconds. Jumbo frames apply only to propagated routes from Amazon Direct Connect. If you add static routes to a route table that point to your virtual private gateway, then traffic routed through the static routes is sent using 1500 MTU. To check whether a connection or virtual interface supports jumbo frames, select it in the Amazon Direct Connect console and find Jumbo frame capable on the virtual interface General configuration page. |
If your public prefixes or ASNs belong to an ISP or network carrier, we request additional information from you. This can be a document using an official company letterhead, or an email from the company's domain name verifying that the network prefix/ASN can be used by you.
When you create a public virtual interface, it can take up to 72 business hours for Amazon to review and approve your request.
**To provision a public virtual interface to non-VPC services**
1. Open the **Amazon Direct Connect** console at [https://console.amazonaws.cn/directconnect/v2/home](https://console.amazonaws.cn/directconnect/v2/home).
1. In the navigation pane, choose **Virtual Interfaces**.
1. Choose **Create virtual interface**.
1. Under **Virtual interface type**, for **Type**, choose **Public**.
1. Under **Public virtual interface settings**, do the following:
1. For **Virtual interface name**, enter a name for the virtual interface.
1. For **Connection**, choose the Direct Connect connection that you want to use for this interface.
1. For **VLAN**, enter the ID number for your virtual local area network (VLAN).
1. For **BGP ASN**, enter the Border Gateway Protocol (BGP) Autonomous System Number (ASN) of your gateway.
The valid values are 1 to 4294967294. This includes support for both ASNs (1-2147483647) and long ASNs (1-4294967294). For more information about ASNs and long ASNs see [Long ASN support in Amazon Direct Connect](long-asn-support.md).
1. Under **Additional settings**, do the following:
1. To configure an IPv4 BGP or an IPv6 peer, do the following:
[IPv4] To configure an IPv4 BGP peer, choose **IPv4** and do one of the following:
+ To specify these IP addresses yourself, for **Your router peer ip**, enter the destination IPv4 CIDR address to which Amazon should send traffic.
+ For **Amazon router peer IP**, enter the IPv4 CIDR address to use to send traffic to Amazon.
[IPv6] To configure an IPv6 BGP peer, choose **IPv6**. The peer IPv6 addresses are automatically assigned from Amazon's pool of IPv6 addresses. You cannot specify custom IPv6 addresses.
1. To provide your own BGP key, enter your BGP MD5 key.
If you do not enter a value, we generate a BGP key.
1. To advertise prefixes to Amazon, for **Prefixes you want to advertise**, enter the IPv4 CIDR destination addresses (separated by commas) to which traffic should be routed over the virtual interface.
1. (Optional) Add or remove a tag.
[Add a tag] Choose **Add tag** and do the following:
+ For **Key**, enter the key name.
+ For **Value**, enter the key value.
[Remove a tag] Next to the tag, choose **Remove tag**.
1. Choose **Create virtual interface**.
**To provision a private virtual interface to a VPC**
1. Open the **Amazon Direct Connect** console at [https://console.amazonaws.cn/directconnect/v2/home](https://console.amazonaws.cn/directconnect/v2/home).
1. In the navigation pane, choose **Virtual Interfaces**.
1. Choose **Create virtual interface**.
1. Under **Virtual interface type**, for **Type**, choose **Private**.
1. Under **Private virtual interface settings**, do the following:
1. For **Virtual interface name**, enter a name for the virtual interface.
1. For **Connection**, choose the Direct Connect connection that you want to use for this interface.
1. For **Gateway type**, choose **Virtual private gateway**, or **Direct Connect gateway**.
1. For **Virtual interface owner**, choose **Another Amazon account**, and then enter the Amazon account.
1. For **Virtual private gateway**, choose the virtual private gateway to use for this interface.
1. For **VLAN**, enter the ID number for your virtual local area network (VLAN).
1. For **BGP ASN**, enter the Border Gateway Protocol Autonomous System Number of your on-premises peer router for the new virtual interface.
The valid values are 1 to 4294967294. This includes support for both ASNs (1-2147483647) and long ASNs (1-4294967294). For more information about ASNs and long ASNs see [Long ASN support in Amazon Direct Connect](long-asn-support.md).
1. Under **Additional Settings**, do the following:
1. To configure an IPv4 BGP or an IPv6 peer, do the following:
[IPv4] To configure an IPv4 BGP peer, choose **IPv4** and do one of the following:
+ To specify these IP addresses yourself, for **Your router peer ip**, enter the destination IPv4 CIDR address to which Amazon should send traffic.
+ For **Amazon router peer ip**, enter the IPv4 CIDR address to use to send traffic to Amazon.
**Important**
When configuring Amazon Direct Connect virtual interfaces, you can specify your own IP addresses using RFC 1918, use other addressing schemes, or opt for Amazon assigned IPv4 /29 CIDR addresses allocated from the RFC 3927 169.254.0.0/16 IPv4 Link-Local range for point-to-point connectivity. These point-to-point connections should be used exclusively for eBGP peering between your customer gateway router and the Direct Connect endpoint. For VPC traffic or tunnelling purposes, such as Amazon Site-to-Site Private IP VPN, or Transit Gateway Connect, Amazon recommends using a loopback or LAN interface on your customer gateway router as the source or destination address instead of the point-to-point connections.
For more information about RFC 1918, see [Address Allocation for Private Internets](https://datatracker.ietf.org/doc/html/rfc1918).
For more information about RFC 3927, see [Dynamic Configuration of IPv4 Link-Local Addresses](https://datatracker.ietf.org/doc/html/rfc3927).
[IPv6] To configure an IPv6 BGP peer, choose **IPv6**. The peer IPv6 addresses are automatically assigned from Amazon's pool of IPv6 addresses. You cannot specify custom IPv6 addresses.
1. To change the maximum transmission unit (MTU) from 1500 (default) to 9001 (jumbo frames), select **Jumbo MTU (MTU size 9001)**.
1. (Optional) Under **Enable SiteLink**, choose **Enabled** to enable direct connectivity between Direct Connect points of presence.
1. (Optional) Add or remove a tag.
[Add a tag] Choose **Add tag** and do the following:
+ For **Key**, enter the key name.
+ For **Value**, enter the key value.
[Remove a tag] Next to the tag, choose **Remove tag**.
1. Choose **Create virtual interface**.
## Step 4: Verify your virtual interface resiliency configuration
After you have established virtual interfaces to the Amazon Cloud or to Amazon VPC, perform a virtual interface failover test to verify that your configuration meets your resiliency requirements. For more information, see [Amazon Direct Connect Failover Test](resiliency_failover.md).
## Step 5: Verify your virtual interfaces connectivity
After you have established virtual interfaces to the Amazon Cloud or to Amazon VPC, you can verify your Amazon Direct Connect connection using the following procedures.
**To verify your virtual interface connection to the Amazon Cloud**
+ Run `traceroute` and verify that the Amazon Direct Connect identifier is in the network trace.
**To verify your virtual interface connection to Amazon VPC**
1. Using a pingable AMI, such as an Amazon Linux AMI, launch an EC2 instance into the VPC that is attached to your virtual private gateway. The Amazon Linux AMIs are available in the **Quick Start** tab when you use the instance launch wizard in the Amazon EC2 console. For more information, see [Launch an Instance](https://docs.amazonaws.cn/AWSEC2/latest/UserGuide/ec2-launch-instance_linux.html) in the *Amazon EC2 User Guide.* Ensure that the security group that's associated with the instance includes a rule permitting inbound ICMP traffic (for the ping request).
1. After the instance is running, get its private IPv4 address (for example, 10.0.0.4). The Amazon EC2 console displays the address as part of the instance details.
1. Ping the private IPv4 address and get a response.
# Configure Direct Connect for high resiliency with the Amazon Direct Connect Resiliency Toolkit
In this example, the Amazon Direct Connect Resiliency Toolkit is used to configure a high resiliency model
**Topics**
+ [Step 1: Sign up for Amazon](#high-resiliency-signup)
+ [Step 2: Configure the resiliency model](#high-resiliency-select-model)
+ [Step 3: Create your virtual interfaces](#high-resiliency-createvirtualinterface)
+ [Step 4: Verify your virtual interface resiliency configuration](#high-res-resiliency-failover)
+ [Step 5: Verify your virtual interfaces connectivity](#high-resiliency-connected)
## Step 1: Sign up for Amazon
To use Amazon Direct Connect, you need an Amazon account if you don't already have one.
### Sign up for an Amazon Web Services account
If you do not have an Amazon Web Services account, use the following procedure to create one.
**To sign up for Amazon Web Services**
1. Open [http://www.amazonaws.cn/](http://www.amazonaws.cn/) and choose **Sign Up**.
1. Follow the on-screen instructions.
Amazon sends you a confirmation email after the sign-up process is complete. At any time, you can view your current account activity and manage your account by going to [http://www.amazonaws.cn/](http://www.amazonaws.cn/) and choosing **My Account**.
### Secure IAM users
After you sign up for an Amazon Web Services account, safeguard your administrative user by turning on multi-factor authentication (MFA). For instructions, see [Enable a virtual MFA device for an IAM user (console)](https://docs.amazonaws.cn/IAM/latest/UserGuide/id_credentials_mfa_enable_virtual.html#enable-virt-mfa-for-iam-user) in the *IAM User Guide*.
To give other users access to your Amazon Web Services account resources, create IAM users. To secure your IAM users, turn on MFA and only give the IAM users the permissions needed to perform their tasks.
For more information about creating and securing IAM users, see the following topics in the *IAM User Guide*:
+ [Creating an IAM user in your Amazon Web Services account](https://docs.amazonaws.cn//IAM/latest/UserGuide/id_users_create.html)
+ [Access management for Amazon resources](https://docs.amazonaws.cn/IAM/latest/UserGuide/access.html)
+ [Example IAM identity-based policies](https://docs.amazonaws.cn/IAM/latest/UserGuide/access_policies_examples.html)
## Step 2: Configure the resiliency model
**To configure a high resiliency model**
1. Open the **Amazon Direct Connect** console at [https://console.amazonaws.cn/directconnect/v2/home](https://console.amazonaws.cn/directconnect/v2/home).
1. In the navigation pane, choose **Connections**, and then choose **Create a connection**.
1. Under **Connection ordering type**, choose **Connection wizard**.
1. Under **Resiliency level**, choose **High Resiliency**, and then choose **Next**.
1. On the **Configure connections** pane, under **Connection settings,** do the following:
1. For **bandwidth**, choose the connection bandwidth.
This bandwidth applies to all of the created connections.
1. For **First location service provider**, select the appropriate Amazon Direct Connect location.
1. If applicable, for **First Sub location**, choose the floor closest to you or your network provider. This option is only available if the location has meet-me rooms (MMRs) on multiple floors of the building.
1. If you selected **Other** for **First location service provider**, for **Name of other provider**, enter the name of the partner that you use.
1. For **Second location service provider**, select the appropriate Amazon Direct Connect location.
1. If applicable, for **Second Sub location**, choose the floor closest to you or your network provider. This option is only available if the location has meet-me rooms (MMRs) on multiple floors of the building.
1. If you selected **Other** for **Second location service provider**, for **Name of other provider**, enter the name of the partner that you use.
1. (Optional) Add or remove a tag.
[Add a tag] Choose **Add tag** and do the following:
+ For **Key**, enter the key name.
+ For **Value**, enter the key value.
[Remove a tag] Next to the tag, choose **Remove tag**.
1. Choose **Next**.
1. Review your connections, and then choose **Continue**.
If your LOAs are ready, you can choose **Download LOA**, and then click **Continue**.
It can take up to 72 business hours for Amazon to review your request and provision a port for your connection. During this time, you might receive an email with a request for more information about your use case or the specified location. The email is sent to the email address that you used when you signed up for Amazon. You must respond within 7 days or the connection is deleted.
## Step 3: Create your virtual interfaces
You can create a private virtual interface to connect to your VPC. Or, you can create a public virtual interface to connect to public Amazon services that aren't in a VPC. When you create a private virtual interface to a VPC, you need a private virtual interface for each VPC that you're connecting to. For example, you need three private virtual interfaces to connect to three VPCs.
Before you begin, ensure that you have the following information:
| Resource | Required information |
| --- | --- |
| Connection | The Amazon Direct Connect connection or link aggregation group (LAG) for which you are creating the virtual interface. |
| Virtual interface name | A name for the virtual interface. |
| Virtual interface owner | If you're creating the virtual interface for another account, you need the Amazon account ID of the other account. |
| (Private virtual interface only) Connection | For connecting to a VPC in the same Amazon Region, you need the virtual private gateway for your VPC. The ASN for the Amazon side of the BGP session is inherited from the virtual private gateway. When you create a virtual private gateway, you can specify your own private ASN. Otherwise, Amazon provides a default ASN. For more information, see [Create a Virtual Private Gateway](https://docs.amazonaws.cn/vpc/latest/userguide/SetUpVPNConnections.html#vpn-create-vpg) in the Amazon VPC User Guide. For connecting to a VPC through a Direct Connect gateway, you need the Direct Connect gateway. For more information, see [Direct Connect Gateways](https://docs.amazonaws.cn/directconnect/latest/UserGuide/direct-connect-gateways.html). |
| VLAN | A unique virtual local area network (VLAN) tag that's not already in use on your connection. The value must be between 1 and 4094 and must comply with the Ethernet 802.1Q standard. This tag is required for any traffic traversing the Amazon Direct Connect connection. If you have a hosted connection, your Amazon Direct Connect Partner provides this value. You can’t modify the value after you have created the virtual interface. |
| Peer IP addresses | A virtual interface can support a BGP peering session for IPv4, IPv6, or one of each (dual-stack). Do not use Elastic IPs (EIPs) or Bring your own IP addresses (BYOIP) from the Amazon Pool to create a public virtual interface. You cannot create multiple BGP sessions for the same IP addressing family on the same virtual interface. The IP address ranges are assigned to each end of the virtual interface for the BGP peering session. [\[See the AWS documentation website for more details\]](http://docs.amazonaws.cn/en_us/directconnect/latest/UserGuide/high-resiliency-set-up.html) |
| Address family | Whether the BGP peering session will be over IPv4 or IPv6. |
| BGP information | [\[See the AWS documentation website for more details\]](http://docs.amazonaws.cn/en_us/directconnect/latest/UserGuide/high-resiliency-set-up.html) |
| (Public virtual interface only) Prefixes you want to advertise | Public IPv4 routes or IPv6 routes to advertise over BGP. You must advertise at least one prefix using BGP, up to a maximum of 1,000 prefixes. [\[See the AWS documentation website for more details\]](http://docs.amazonaws.cn/en_us/directconnect/latest/UserGuide/high-resiliency-set-up.html) |
| (Private and transit virtual interfaces only) Jumbo frames | The maximum transmission unit (MTU) of packets over Amazon Direct Connect. The default is 1500. Setting the MTU of a virtual interface to 9001 (jumbo frames) can cause an update to the underlying physical connection if it wasn't updated to support jumbo frames. Updating the connection disrupts network connectivity for all virtual interfaces associated with the connection for up to 30 seconds. Jumbo frames apply only to propagated routes from Amazon Direct Connect. If you add static routes to a route table that point to your virtual private gateway, then traffic routed through the static routes is sent using 1500 MTU. To check whether a connection or virtual interface supports jumbo frames, select it in the Amazon Direct Connect console and find Jumbo frame capable on the virtual interface General configuration page. |
If your public prefixes or ASNs belong to an ISP or network carrier, Amazon requests additional information from you. This can be a document using an official company letterhead, or an email from the company's domain name verifying that the network prefix/ASN can be used by you.
When you create a public virtual interface, it can take up to 72 business hours for Amazon to review and approve your request.
**To provision a public virtual interface to non-VPC services**
1. Open the **Amazon Direct Connect** console at [https://console.amazonaws.cn/directconnect/v2/home](https://console.amazonaws.cn/directconnect/v2/home).
1. In the navigation pane, choose **Virtual Interfaces**.
1. Choose **Create virtual interface**.
1. Under **Virtual interface type**, for **Type**, choose **Public**.
1. Under **Public virtual interface settings**, do the following:
1. For **Virtual interface name**, enter a name for the virtual interface.
1. For **Connection**, choose the Direct Connect connection that you want to use for this interface.
1. For **VLAN**, enter the ID number for your virtual local area network (VLAN).
1. For **BGP ASN**, enter the Border Gateway Protocol (BGP) Autonomous System Number (ASN) of your gateway.
The valid values are 1 to 4294967294. This includes support for both ASNs (1-2147483647) and long ASNs (1-4294967294). For more information about ASNs and long ASNs see [Long ASN support in Amazon Direct Connect](long-asn-support.md).
1. Under **Additional settings**, do the following:
1. To configure an IPv4 BGP or an IPv6 peer, do the following:
[IPv4] To configure an IPv4 BGP peer, choose **IPv4** and do one of the following:
+ To specify these IP addresses yourself, for **Your router peer ip**, enter the destination IPv4 CIDR address to which Amazon should send traffic.
+ For **Amazon router peer IP**, enter the IPv4 CIDR address to use to send traffic to Amazon.
[IPv6] To configure an IPv6 BGP peer, choose **IPv6**. The peer IPv6 addresses are automatically assigned from Amazon's pool of IPv6 addresses. You cannot specify custom IPv6 addresses.
1. To provide your own BGP key, enter your BGP MD5 key.
If you do not enter a value, we generate a BGP key.
1. To advertise prefixes to Amazon, for **Prefixes you want to advertise**, enter the IPv4 CIDR destination addresses (separated by commas) to which traffic should be routed over the virtual interface.
1. (Optional) Add or remove a tag.
[Add a tag] Choose **Add tag** and do the following:
+ For **Key**, enter the key name.
+ For **Value**, enter the key value.
[Remove a tag] Next to the tag, choose **Remove tag**.
1. Choose **Create virtual interface**.
**To provision a private virtual interface to a VPC**
1. Open the **Amazon Direct Connect** console at [https://console.amazonaws.cn/directconnect/v2/home](https://console.amazonaws.cn/directconnect/v2/home).
1. In the navigation pane, choose **Virtual Interfaces**.
1. Choose **Create virtual interface**.
1. Under **Virtual interface type**, for **Type**, choose **Private**.
1. Under **Private virtual interface settings**, do the following:
1. For **Virtual interface name**, enter a name for the virtual interface.
1. For **Connection**, choose the Direct Connect connection that you want to use for this interface.
1. For **Gateway type**, choose **Virtual private gateway**, or **Direct Connect gateway**.
1. For **Virtual interface owner**, choose **Another Amazon account**, and then enter the Amazon account.
1. For **Virtual private gateway**, choose the virtual private gateway to use for this interface.
1. For **VLAN**, enter the ID number for your virtual local area network (VLAN).
1. For **BGP ASN**, enter the Border Gateway Protocol Autonomous System Number of your on-premises peer router for the new virtual interface.
The valid values are 1 to 4294967294. This includes support for both ASNs (1-2147483647) and long ASNs (1-4294967294). For more information about ASNs and long ASNs see [Long ASN support in Amazon Direct Connect](long-asn-support.md).
1. Under **Additional Settings**, do the following:
1. To configure an IPv4 BGP or an IPv6 peer, do the following:
[IPv4] To configure an IPv4 BGP peer, choose **IPv4** and do one of the following:
+ To specify these IP addresses yourself, for **Your router peer ip**, enter the destination IPv4 CIDR address to which Amazon should send traffic.
+ For **Amazon router peer ip**, enter the IPv4 CIDR address to use to send traffic to Amazon.
**Important**
When configuring Amazon Direct Connect virtual interfaces, you can specify your own IP addresses using RFC 1918, use other addressing schemes, or opt for Amazon assigned IPv4 /29 CIDR addresses allocated from the RFC 3927 169.254.0.0/16 IPv4 Link-Local range for point-to-point connectivity. These point-to-point connections should be used exclusively for eBGP peering between your customer gateway router and the Direct Connect endpoint. For VPC traffic or tunnelling purposes, such as Amazon Site-to-Site Private IP VPN, or Transit Gateway Connect, Amazon recommends using a loopback or LAN interface on your customer gateway router as the source or destination address instead of the point-to-point connections.
For more information about RFC 1918, see [Address Allocation for Private Internets](https://datatracker.ietf.org/doc/html/rfc1918).
For more information about RFC 3927, see [Dynamic Configuration of IPv4 Link-Local Addresses](https://datatracker.ietf.org/doc/html/rfc3927).
[IPv6] To configure an IPv6 BGP peer, choose **IPv6**. The peer IPv6 addresses are automatically assigned from Amazon's pool of IPv6 addresses. You cannot specify custom IPv6 addresses.
1. To change the maximum transmission unit (MTU) from 1500 (default) to 9001 (jumbo frames), select **Jumbo MTU (MTU size 9001)**.
1. (Optional) Under **Enable SiteLink**, choose **Enabled** to enable direct connectivity between Direct Connect points of presence.
1. (Optional) Add or remove a tag.
[Add a tag] Choose **Add tag** and do the following:
+ For **Key**, enter the key name.
+ For **Value**, enter the key value.
[Remove a tag] Next to the tag, choose **Remove tag**.
1. Choose **Create virtual interface**.
## Step 4: Verify your virtual interface resiliency configuration
After you have established virtual interfaces to the Amazon Cloud or to Amazon VPC, perform a virtual interface failover test to verify that your configuration meets your resiliency requirements. For more information, see [Amazon Direct Connect Failover Test](resiliency_failover.md).
## Step 5: Verify your virtual interfaces connectivity
After you have established virtual interfaces to the Amazon Cloud or to Amazon VPC, you can verify your Amazon Direct Connect connection using the following procedures.
**To verify your virtual interface connection to the Amazon Cloud**
+ Run `traceroute` and verify that the Amazon Direct Connect identifier is in the network trace.
**To verify your virtual interface connection to Amazon VPC**
1. Using a pingable AMI, such as an Amazon Linux AMI, launch an EC2 instance into the VPC that is attached to your virtual private gateway. The Amazon Linux AMIs are available in the **Quick Start** tab when you use the instance launch wizard in the Amazon EC2 console. For more information, see [Launch an Instance](https://docs.amazonaws.cn/AWSEC2/latest/UserGuide/ec2-launch-instance_linux.html) in the *Amazon EC2 User Guide.* Ensure that the security group that's associated with the instance includes a rule permitting inbound ICMP traffic (for the ping request).
1. After the instance is running, get its private IPv4 address (for example, 10.0.0.4). The Amazon EC2 console displays the address as part of the instance details.
1. Ping the private IPv4 address and get a response.
# Configure Amazon Direct Connect for development and test resiliency with the Amazon Direct Connect Resiliency Toolkit
In this example, the Amazon Direct Connect Resiliency Toolkit is used to configure a development and test resiliency model
**Topics**
+ [Step 1: Sign up for Amazon](#dev-test-signup)
+ [Step 2: Configure the resiliency model](#dev-test-select-model)
+ [Step 3: Create a virtual interface](#dev-test-createvirtualinterface)
+ [Step 4: Verify your virtual interface resiliency configuration](#dev-test-resiliency-failover)
+ [Step 5: Verify your virtual interface](#dev-test-connected)
## Step 1: Sign up for Amazon
To use Amazon Direct Connect, you need an Amazon account if you don't already have one.
### Sign up for an Amazon Web Services account
If you do not have an Amazon Web Services account, use the following procedure to create one.
**To sign up for Amazon Web Services**
1. Open [http://www.amazonaws.cn/](http://www.amazonaws.cn/) and choose **Sign Up**.
1. Follow the on-screen instructions.
Amazon sends you a confirmation email after the sign-up process is complete. At any time, you can view your current account activity and manage your account by going to [http://www.amazonaws.cn/](http://www.amazonaws.cn/) and choosing **My Account**.
### Secure IAM users
After you sign up for an Amazon Web Services account, safeguard your administrative user by turning on multi-factor authentication (MFA). For instructions, see [Enable a virtual MFA device for an IAM user (console)](https://docs.amazonaws.cn/IAM/latest/UserGuide/id_credentials_mfa_enable_virtual.html#enable-virt-mfa-for-iam-user) in the *IAM User Guide*.
To give other users access to your Amazon Web Services account resources, create IAM users. To secure your IAM users, turn on MFA and only give the IAM users the permissions needed to perform their tasks.
For more information about creating and securing IAM users, see the following topics in the *IAM User Guide*:
+ [Creating an IAM user in your Amazon Web Services account](https://docs.amazonaws.cn//IAM/latest/UserGuide/id_users_create.html)
+ [Access management for Amazon resources](https://docs.amazonaws.cn/IAM/latest/UserGuide/access.html)
+ [Example IAM identity-based policies](https://docs.amazonaws.cn/IAM/latest/UserGuide/access_policies_examples.html)
## Step 2: Configure the resiliency model
**To configure the resiliency model**
1. Open the **Amazon Direct Connect** console at [https://console.amazonaws.cn/directconnect/v2/home](https://console.amazonaws.cn/directconnect/v2/home).
1. In the navigation pane, choose **Connections**, and then choose **Create a connection**.
1. Under **Connection ordering type**, choose **Connection wizard**.
1. Under **Resiliency level**, choose **Development and test**, and then choose **Next**.
1. On the **Configure connections** pane, under **Connection settings,** do the following:
1. For **bandwidth**, choose the connection bandwidth.
This bandwidth applies to all of the created connections.
1. For **First location service provider**, select the appropriate Amazon Direct Connect location.
1. If applicable, for **First Sub location**, choose the floor closest to you or your network provider. This option is only available if the location has meet-me rooms (MMRs) on multiple floors of the building.
1. If you selected **Other** for **First location service provider**, for **Name of other provider**, enter the name of the partner that you use.
1. (Optional) Add or remove a tag.
[Add a tag] Choose **Add tag** and do the following:
+ For **Key**, enter the key name.
+ For **Value**, enter the key value.
[Remove a tag] Next to the tag, choose **Remove tag**.
1. Choose **Next**.
1. Review your connections, and then choose **Continue**.
If your LOAs are ready, you can choose **Download LOA**, and then click **Continue**.
It can take up to 72 business hours for Amazon to review your request and provision a port for your connection. During this time, you might receive an email with a request for more information about your use case or the specified location. The email is sent to the email address that you used when you signed up for Amazon. You must respond within 7 days or the connection is deleted.
## Step 3: Create a virtual interface
To begin using your Amazon Direct Connect connection, you must create a virtual interface. You can create a private virtual interface to connect to your VPC. Or, you can create a public virtual interface to connect to public Amazon services that aren't in a VPC. When you create a private virtual interface to a VPC, you need a private virtual interface for each VPC that you're connecting to. For example, you need three private virtual interfaces to connect to three VPCs.
Before you begin, ensure that you have the following information:
| Resource | Required information |
| --- | --- |
| Connection | The Amazon Direct Connect connection or link aggregation group (LAG) for which you are creating the virtual interface. |
| Virtual interface name | A name for the virtual interface. |
| Virtual interface owner | If you're creating the virtual interface for another account, you need the Amazon account ID of the other account. |
| (Private virtual interface only) Connection | For connecting to a VPC in the same Amazon Region, you need the virtual private gateway for your VPC. The ASN for the Amazon side of the BGP session is inherited from the virtual private gateway. When you create a virtual private gateway, you can specify your own private ASN. Otherwise, Amazon provides a default ASN. For more information, see [Create a Virtual Private Gateway](https://docs.amazonaws.cn/vpc/latest/userguide/SetUpVPNConnections.html#vpn-create-vpg) in the Amazon VPC User Guide. For connecting to a VPC through a Direct Connect gateway, you need the Direct Connect gateway. For more information, see [Direct Connect Gateways](https://docs.amazonaws.cn/directconnect/latest/UserGuide/direct-connect-gateways.html). |
| VLAN | A unique virtual local area network (VLAN) tag that's not already in use on your connection. The value must be between 1 and 4094 and must comply with the Ethernet 802.1Q standard. This tag is required for any traffic traversing the Amazon Direct Connect connection. If you have a hosted connection, your Amazon Direct Connect Partner provides this value. You can’t modify the value after you have created the virtual interface. |
| Peer IP addresses | A virtual interface can support a BGP peering session for IPv4, IPv6, or one of each (dual-stack). Do not use Elastic IPs (EIPs) or Bring your own IP addresses (BYOIP) from the Amazon Pool to create a public virtual interface. You cannot create multiple BGP sessions for the same IP addressing family on the same virtual interface. The IP address ranges are assigned to each end of the virtual interface for the BGP peering session. [\[See the AWS documentation website for more details\]](http://docs.amazonaws.cn/en_us/directconnect/latest/UserGuide/devtest-resiliency-set-up.html) |
| Address family | Whether the BGP peering session will be over IPv4 or IPv6. |
| BGP information | [\[See the AWS documentation website for more details\]](http://docs.amazonaws.cn/en_us/directconnect/latest/UserGuide/devtest-resiliency-set-up.html) |
| (Public virtual interface only) Prefixes you want to advertise | Public IPv4 routes or IPv6 routes to advertise over BGP. You must advertise at least one prefix using BGP, up to a maximum of 1,000 prefixes. [\[See the AWS documentation website for more details\]](http://docs.amazonaws.cn/en_us/directconnect/latest/UserGuide/devtest-resiliency-set-up.html) |
| (Private and transit virtual interfaces only) Jumbo frames | The maximum transmission unit (MTU) of packets over Amazon Direct Connect. The default is 1500. Setting the MTU of a virtual interface to 9001 (jumbo frames) can cause an update to the underlying physical connection if it wasn't updated to support jumbo frames. Updating the connection disrupts network connectivity for all virtual interfaces associated with the connection for up to 30 seconds. Jumbo frames apply only to propagated routes from Amazon Direct Connect. If you add static routes to a route table that point to your virtual private gateway, then traffic routed through the static routes is sent using 1500 MTU. To check whether a connection or virtual interface supports jumbo frames, select it in the Amazon Direct Connect console and find Jumbo frame capable on the virtual interface General configuration page. |
If your public prefixes or ASNs belong to an ISP or network carrier, we request additional information from you. This can be a document using an official company letterhead, or an email from the company's domain name verifying that the network prefix/ASN can be used by you.
When you create a public virtual interface, it can take up to 72 business hours for Amazon to review and approve your request.
**To provision a public virtual interface to non-VPC services**
1. Open the **Amazon Direct Connect** console at [https://console.amazonaws.cn/directconnect/v2/home](https://console.amazonaws.cn/directconnect/v2/home).
1. In the navigation pane, choose **Virtual Interfaces**.
1. Choose **Create virtual interface**.
1. Under **Virtual interface type**, for **Type**, choose **Public**.
1. Under **Public virtual interface settings**, do the following:
1. For **Virtual interface name**, enter a name for the virtual interface.
1. For **Connection**, choose the Direct Connect connection that you want to use for this interface.
1. For **VLAN**, enter the ID number for your virtual local area network (VLAN).
1. For **BGP ASN**, enter the Border Gateway Protocol (BGP) Autonomous System Number (ASN) of your gateway.
The valid values are 1 to 4294967294. This includes support for both ASNs (1-2147483647) and long ASNs (1-4294967294). For more information about ASNs and long ASNs see [Long ASN support in Amazon Direct Connect](long-asn-support.md).
1. Under **Additional settings**, do the following:
1. To configure an IPv4 BGP or an IPv6 peer, do the following:
[IPv4] To configure an IPv4 BGP peer, choose **IPv4** and do one of the following:
+ To specify these IP addresses yourself, for **Your router peer ip**, enter the destination IPv4 CIDR address to which Amazon should send traffic.
+ For **Amazon router peer IP**, enter the IPv4 CIDR address to use to send traffic to Amazon.
[IPv6] To configure an IPv6 BGP peer, choose **IPv6**. The peer IPv6 addresses are automatically assigned from Amazon's pool of IPv6 addresses. You cannot specify custom IPv6 addresses.
1. To provide your own BGP key, enter your BGP MD5 key.
If you do not enter a value, we generate a BGP key.
1. To advertise prefixes to Amazon, for **Prefixes you want to advertise**, enter the IPv4 CIDR destination addresses (separated by commas) to which traffic should be routed over the virtual interface.
1. (Optional) Add or remove a tag.
[Add a tag] Choose **Add tag** and do the following:
+ For **Key**, enter the key name.
+ For **Value**, enter the key value.
[Remove a tag] Next to the tag, choose **Remove tag**.
1. Choose **Create virtual interface**.
**To provision a private virtual interface to a VPC**
1. Open the **Amazon Direct Connect** console at [https://console.amazonaws.cn/directconnect/v2/home](https://console.amazonaws.cn/directconnect/v2/home).
1. In the navigation pane, choose **Virtual Interfaces**.
1. Choose **Create virtual interface**.
1. Under **Virtual interface type**, for **Type**, choose **Private**.
1. Under **Private virtual interface settings**, do the following:
1. For **Virtual interface name**, enter a name for the virtual interface.
1. For **Connection**, choose the Direct Connect connection that you want to use for this interface.
1. For **Gateway type**, choose **Virtual private gateway**, or **Direct Connect gateway**.
1. For **Virtual interface owner**, choose **Another Amazon account**, and then enter the Amazon account.
1. For **Virtual private gateway**, choose the virtual private gateway to use for this interface.
1. For **VLAN**, enter the ID number for your virtual local area network (VLAN).
1. For **BGP ASN**, enter the Border Gateway Protocol Autonomous System Number of your on-premises peer router for the new virtual interface.
The valid values are 1 to 4294967294. This includes support for both ASNs (1-2147483647) and long ASNs (1-4294967294). For more information about ASNs and long ASNs see [Long ASN support in Amazon Direct Connect](long-asn-support.md).
1. Under **Additional Settings**, do the following:
1. To configure an IPv4 BGP or an IPv6 peer, do the following:
[IPv4] To configure an IPv4 BGP peer, choose **IPv4** and do one of the following:
+ To specify these IP addresses yourself, for **Your router peer ip**, enter the destination IPv4 CIDR address to which Amazon should send traffic.
+ For **Amazon router peer ip**, enter the IPv4 CIDR address to use to send traffic to Amazon.
**Important**
When configuring Amazon Direct Connect virtual interfaces, you can specify your own IP addresses using RFC 1918, use other addressing schemes, or opt for Amazon assigned IPv4 /29 CIDR addresses allocated from the RFC 3927 169.254.0.0/16 IPv4 Link-Local range for point-to-point connectivity. These point-to-point connections should be used exclusively for eBGP peering between your customer gateway router and the Direct Connect endpoint. For VPC traffic or tunnelling purposes, such as Amazon Site-to-Site Private IP VPN, or Transit Gateway Connect, Amazon recommends using a loopback or LAN interface on your customer gateway router as the source or destination address instead of the point-to-point connections.
For more information about RFC 1918, see [Address Allocation for Private Internets](https://datatracker.ietf.org/doc/html/rfc1918).
For more information about RFC 3927, see [Dynamic Configuration of IPv4 Link-Local Addresses](https://datatracker.ietf.org/doc/html/rfc3927).
[IPv6] To configure an IPv6 BGP peer, choose **IPv6**. The peer IPv6 addresses are automatically assigned from Amazon's pool of IPv6 addresses. You cannot specify custom IPv6 addresses.
1. To change the maximum transmission unit (MTU) from 1500 (default) to 9001 (jumbo frames), select **Jumbo MTU (MTU size 9001)**.
1. (Optional) Under **Enable SiteLink**, choose **Enabled** to enable direct connectivity between Direct Connect points of presence.
1. (Optional) Add or remove a tag.
[Add a tag] Choose **Add tag** and do the following:
+ For **Key**, enter the key name.
+ For **Value**, enter the key value.
[Remove a tag] Next to the tag, choose **Remove tag**.
1. Choose **Create virtual interface**.
## Step 4: Verify your virtual interface resiliency configuration
After you have established virtual interfaces to the Amazon Cloud or to Amazon VPC, perform a virtual interface failover test to verify that your configuration meets your resiliency requirements. For more information, see [Amazon Direct Connect Failover Test](resiliency_failover.md).
## Step 5: Verify your virtual interface
After you have established virtual interfaces to the Amazon Cloud or to Amazon VPC, you can verify your Amazon Direct Connect connection using the following procedures.
**To verify your virtual interface connection to the Amazon Cloud**
+ Run `traceroute` and verify that the Amazon Direct Connect identifier is in the network trace.
**To verify your virtual interface connection to Amazon VPC**
1. Using a pingable AMI, such as an Amazon Linux AMI, launch an EC2 instance into the VPC that is attached to your virtual private gateway. The Amazon Linux AMIs are available in the **Quick Start** tab when you use the instance launch wizard in the Amazon EC2 console. For more information, see [Launch an Instance](https://docs.amazonaws.cn/AWSEC2/latest/UserGuide/ec2-launch-instance_linux.html) in the *Amazon EC2 User Guide.* Ensure that the security group that's associated with the instance includes a rule permitting inbound ICMP traffic (for the ping request).
1. After the instance is running, get its private IPv4 address (for example, 10.0.0.4). The Amazon EC2 console displays the address as part of the instance details.
1. Ping the private IPv4 address and get a response.
# Amazon Direct Connect Failover Test
The Amazon Direct Connect Resiliency Toolkit resiliency models are designed to ensure that you have the appropriate number of virtual interface connections in multiple locations. After you complete the wizard, use the Amazon Direct Connect Resiliency Toolkit failover test to bring down the BGP peering session in order to verify that traffic routes to one of your redundant virtual interfaces, and meets your resiliency requirements.
Use the test to make sure that traffic routes over redundant virtual interfaces when a virtual interface is out of service. You start the test by selecting a virtual interface, BGP peering session, and how long to run the test. Amazon places the selected virtual interface BGP peering session in the down state. When the interface is in this state, traffic should go over a redundant virtual interface. If your configuration does not contain the appropriate redundant connections, the BGP peering session fails, and traffic does not get routed. When the test completes, or you manually stop the test, Amazon restores the BGP session. After the test is complete, you can use the Amazon Direct Connect Resiliency Toolkit to adjust your configuration.
**Note**
Do not use this feature during a Direct Connect maintenance period as the BGP session might be restored prematurely either during or after the maintenance.
## Test history
Amazon deletes the test history after 365 days. The test history includes the status for tests that were run on all BGP peers. The history includes which BGP peering sessions were tested, the start and end times, and the test status, which can be any of the following values:
+ **In progress** - The test is currently running.
+ **Completed** - The test ran for the time that you specified.
+ **Cancelled** - The test was cancelled before the specified time.
+ **Failed** - The test did not run for the time that you specified. This can happen when there is an issue with the router.
For more information, see [View Amazon Direct Connect Resiliency Toolkit virtual interface failover test history](view_failover_test.md).
## Validation permissions
The only account that has permission to run the failover test is the account that owns the virtual interface. The account owner receives an indication through Amazon CloudTrail that a test ran on a virtual interface.
**Topics**
+ [Test history](#test_history)
+ [Validation permissions](#permissions)
+ [Start a virtual interface failover test](start_failover_test.md)
+ [View a virtual interface failover test history](view_failover_test.md)
+ [Stop a virtual interface failover test](stop_failover_test.md)
# Start an Amazon Direct Connect Resiliency Toolkit virtual interface failover test
You can start the virtual interface failover test using the Amazon Direct Connect console, or the Amazon CLI.
**To start the virtual interface failover test from the Amazon Direct Connect console**
1. Open the **Amazon Direct Connect** console at [https://console.amazonaws.cn/directconnect/v2/home](https://console.amazonaws.cn/directconnect/v2/home).
1. Choose **Virtual interfaces**.
1. Select the virtual interfaces and then choose **Actions**, **Bring down BGP**.
You can run the test on a public, private, or transit virtual interface.
1. In the **Start failure test** dialog box, do the following:
1. For **Peerings to bring down to test**, choose which peering sessions to test, for example IPv4.
1. For **Test maximum time**, enter the number of minutes that the test will last.
The maximum value is 4,320 minutes (72 business hours).
The default value is 180 minutes (3 hours).
1. For **To confirm test**, enter **Confirm**.
1. Choose **Confirm**.
The BGP peering session is placed in the DOWN state. You can send traffic to verify that there are no outages. If needed, you can stop the test immediately.
**To start the virtual interface failover test using the Amazon CLI**
Use [StartBgpFailoverTest](https://docs.amazonaws.cn/directconnect/latest/APIReference/API_StartBgpFailoverTest.html).
# View Amazon Direct Connect Resiliency Toolkit virtual interface failover test history
You can view the virtual interface failover test history using the Amazon Direct Connect console, or the Amazon CLI.
**To view the virtual interface failover test history from the Amazon Direct Connect console**
1. Open the **Amazon Direct Connect** console at [https://console.amazonaws.cn/directconnect/v2/home](https://console.amazonaws.cn/directconnect/v2/home).
1. Choose **Virtual interfaces**.
1. Select the virtual interface and then choose **View details**.
1. Choose **Test history**.
The console displays the virtual interface tests that you performed for the virtual interface.
1. To view the details for a specific test, select the test id.
**To view the virtual interface failover test history using the Amazon CLI**
Use [ListVirtualInterfaceTestHistory](https://docs.amazonaws.cn/directconnect/latest/APIReference/API_ListVirtualInterfaceTestHistory.html).
# Stop an Amazon Direct Connect Resiliency Toolkit virtual interface failover test
You can stop the virtual interface failover test using the Amazon Direct Connect console, or the Amazon CLI.
**To stop the virtual interface failover test from the Amazon Direct Connect console**
1. Open the **Amazon Direct Connect** console at [https://console.amazonaws.cn/directconnect/v2/home](https://console.amazonaws.cn/directconnect/v2/home).
1. Choose **Virtual interfaces**.
1. Select the virtual interface, and then choose **Actions**, **Cancel test**.
1. Choose **Confirm**.
Amazon restores the BGP peering session. The testing history displays "cancelled" for the test.
**To stop the virtual interface failover test using the Amazon CLI**
Use [StopBgpFailoverTest](https://docs.amazonaws.cn/directconnect/latest/APIReference/API_StopBgpFailoverTest.html).