New and Changed Information

The following table provides an overview of the changes to the organization and content of this guide up to the current release. The table does not provide an exhaustive list of all changes made to the guide or the new features of the Cisco Cloud APIC.

Table 1. New and Changed Information

Release

Feature or Change Description

Where Documented

Release 4.2(1)

Updated the document for Cloud APIC in Microsoft Azure

Release 4.1(1)

First release of this document

About Shared On-Premises L3Out for Cisco Cloud APIC Workloads

This document describes how to configure an on-premises external connectivity that is shared by a cloud site in a Cisco ACI multi-cloud architecture. The cloud site can be either Amazon Web Services (AWS) or Microsoft Azure or both. In this situation, the endpoints on a cloud site can use the on-premises external connectivity (L3Out) to access networks outside of the ACI architecture and/or the Internet. One example use case is to use an on-premises firewall to enforce certain mandatory security policies for traffic going in and out of a cloud site.

Figure 1. Shared L3Out, On-Premises and AWS
Figure 2. Shared L3Out, On-Premises and Azure

Prerequisites

  • You must have an on-premises Cisco APIC installed and configured, as described in Cisco APIC Installation, Upgrade, and Downgrade Guide.

    If you plan to use Cloud APIC in AWS, you must use Cisco APIC Release 4.1(1) or later.

    If you plan to use Cloud APIC in Azure, you must use Cisco APIC Release 4.2(1) or later.

  • You must have an L3Out configured on your on-premises Cisco APIC site, as described in Cisco APIC Layer 3 Networking Configuration Guide.

  • You must have a Cisco ACI Multi-Site Orchestrator installed and configured and the on-premises site added, as described in Cisco ACI Multi-Site Orchestrator Installation and Upgrade Guide

    If you plan to use Cloud APIC in AWS, you must install Cisco ACI Multi-Site Release 2.1(1) or later.

    If you plan to use Cloud APIC in Azure, you must install Cisco ACI Multi-Site Release 2.2(1) or later.

  • You must have a Cloud APIC installed, configured, and added to the Multi-Site Orchestrator.

    For AWS, you must install Cloud APIC Release 4.1(1) or later, as described in the Cisco Cloud APIC for AWS Installation Guide.

    For Azure, you must install Cloud APIC Release 4.2(1) or later, as described in the Cisco Cloud APIC for Azure Installation Guide.

  • If you plan to use Amazon Web Services, you must have an AWS account set up and configured for the user tenant that will be used in this use case, as described in Setting Up the AWS Account for the User Tenant chapter of the Cisco Cloud APIC for AWS Installation Guide

    There is a one-to-one mapping between AWS accounts and Cisco Cloud APIC tenants, so each tenant must have a unique AWS account associated with it. However, if you already configured an AWS account and a user tenant in your Cisco Cloud APIC, you can choose to use the same tenant for this use-case.

  • If you plan to use Microsoft Azure, you must have an Azure subscription set up and configured to use for the user tenant, as described in chapter of the Cisco Cloud APIC for Azure Installation Guide.

    You can create multiple Cloud APIC tenants under the same Azure subscription or you can choose to create a separate subscription for each Cloud APIC tenant. For this use case you can choose to create a new tenant or use an existing one you may have configured previously, for example the Infra tenant used for the Cloud APIC installation.

Guidelines and Limitations

When configuring this use case, the following restrictions apply:
  • ACI Multi-Site multi-cloud deployments support a combination of any two cloud sites (AWS, Azure, or both) and two on-premises sites for a total of four sites.

  • If you plan to use Amazon Web Services cloud site, you cannot use the same account for multiple Tenants. This includes the infra Tenant as well as any user Tenants you may configure.

  • The on-premises L3Out and cloud EPGs must not be in Tenant common.

  • The on-premises L3Out, the cloud EPG, and the Contract must all be in the same Tenant.

  • When configuring L3Out contract, the scope of the contract can be vrf or tenant if the cloud EPG uses the same VRF as the L3Out. The scope must be tenant if a separate VRF is configured for the cloud EPG.

  • When an on-premises L3Out has a contract with a cloud EPG in a different VRF, the VRF in which the cloud EPG resides cannot be stretched to the on-premises site and cannot have a contract with any other VRF in the on-premises site.

  • When configuring an external subnet in an on-premises external EPG:

    • Mark the external subnet with a shared route-control flag to have a contract with a cloud EPG.

      The external subnet must be marked even if the external EPG and the cloud EPG are in the same VRF.

    • Specify the external subnet as a non-zero subnet. Only explicit subnets can be exported to the cloud.

    • The external subnet must not overlap with another external subnet.

    • Aggregation of routes is not supported. In other words, you must add individual subnets, such as 10.10.10.0/24 and 10.10.11.0/24, rather than a single 10.10.0.0/16 subnet.

  • For cloud subnet routes to be advertised out of the fabric, you must configure the on-premises L3out to enable the Export Route Control Subnet flag.

    You can do this in your on-premises APIC GUI by navigating to Tenants > <tenant-name> > Networking > External Routed Networks > <network-name> > Networks > <network-name> and adding the cloud subnet. Then in the Create Subnet window checking the Export Route Control Subnet checkbox.

  • The external subnet that is configured as classification subnet in the on-premises external EPG must have been learned through the routing protocol in the L3Out or created as a static route.

Gathering the Necessary Information

There are several pieces of information that you will need as you go through the procedures in this document. Gather the information outlined in the following sections, then refer to the information that you enter in this section in later procedures, when necessary.

Cloud Tenant Information

When you add a tenant in Multi-Site Orchestrator GUI as described later in this document, you must provide cloud account information for the cloud service where the tenant will be created. You can obtain this information from either your AWS account or Azure account.


Note

If you are planning to deploy the tenant to only one type of cloud service, you can skip the irrelevant information in the following tables.


Table 2. AWS Information for Cloud Tenant

Required Information

Your values

Where to locate the information

AWS account ID for the user tenant

____________________

The Amazon account for your cloud tenant.

Creating a new AWS account and user is described in Setting Up an AWS Account and User.

AWS Access Key ID and Secret Access Key for the user tenant

AccessKey:

____________________

Secret Access Key:

____________________

The following information is required only for Untrusted tenants only. If you plan to add a Trusted tenant, you can skip this field.

You can use the information from the .csv file you downloaded when you created the AWS account and user or follow the following procedures to locate this information in AWS:

  1. Log into this new, separate Amazon Web Services account.

  2. Go to Identity and Access Management (IAM).

    https://aws.amazon.com/iam/

  3. In the left pane, select Users.

  4. Click the link for your Cisco Cloud APIC user tenant account.

  5. On the Summary page, click the Security credentials tab.

  6. Click Create access key if you do not already have an Amazon Web Services access key ID.

  7. Locate the information from the Access key ID and Secret access key fields.

Table 3. Azure Information for Cloud Tenant

Required Information

Your values

Where to locate the information

Azure account subscription ID for the user tenant

____________________

Use the Azure subscription ID. You can obtain the subscription ID by logging into your Azure account and navigating to Home > All Services > Subscriptions.

Note 
Keep in mind, you must use the Subscription ID and not Subscription Name as listed in the Azure portal.

Alternatively, if you'd like to create a new subscription specifically for the tenant you plan to use for this use case, follow the steps described in Setting Up an Azure Account with a Subscription for this field.

Azure Application ID, Directory ID, and Client Secret

Subscription ID:

____________________

Application ID:

____________________

Client Secret:

____________________

The following information is required only for Unmanaged tenants. If you plan to add a managed tenant, you can skip this field.

You can locate this information using the following procedure:

  1. Log into your Azure account.

  2. Navigate to Home > All Services > App registrations > <application-name> and note the Application (client) ID and Directory (tenant) ID.

  3. Then click Certificates & secrets > New client secret and create a Client Secret.

    Note 

    The secret is only viewable immediately after you create it.

Setting Up an AWS Account and User

There is a one-to-one mapping between AWS accounts and Cisco Cloud APIC tenants, so each tenant must have a unique AWS account associated with it. This includes the infra tenant as well as any user tenants you may configure.


Note

You must have a separate AWS user for each user tenant. However, if you are configuring several different use case scenarios, you can use the same user tenant for all the use cases. You can use the following procedure to create a new user within your AWS account, if necessary.


Procedure

Step 1

Create a new Amazon Web Services account for the Cloud APIC user tenant.

  1. Browse to https://aws.amazon.com/.

  2. Click Create an AWS Account.

  3. Enter the necessary information to create a new AWS account.

Step 2

Log in to your AWS account.

Step 3

Go to the AWS Management Console:

Step 4

Create a new user in your AWS account.

This step is required for Untrusted tenants only. If you are planning to add this tenant as a Trusted tenant, you only need the AWS account ID and can skip this step.

  1. Click the Services link at the top of the screen, then click the IAM link.

  2. In the left pane, click Users, then click the Add user button.

    The Add User page appears.

  3. In the User name field, enter a unique name for this user.

  4. In the Access type field, check Programmatic access, then click the Next: Permissions button at the bottom of the page.

  5. In the Set permissions area, select Attach existing policies directly.

    The screen expands to display Filter policies information.

  6. Check the box next to Administrator Access, then click the Next: Tags button at the bottom of the page.

  7. Leave the information in the Add tags page as-is and click the Next: Review button at the bottom of the page.

  8. Click the Create User button at the bottom of the page.

    Ignore the warning that states This user has no permissions if that warning appears.

    An access key is created for you at this point.

  9. Make a note of the Access Key ID and Secret Access Key information for this Amazon Web Services admin account.

    Download the .csv file or copy the information from the Access key ID and Secret access key fields to a file.

  10. Click the Close button at the bottom of the page.


Setting Up an Azure Account with a Subscription

You can choose to deploy multiple tenants within the same subscription or create a separate subscription for each tenant.

If you want to use an existing subscription, for example the one where you deployed your Cloud APIC, skip this section. Otherwise, you can create a separate subscription specifically for the tenant in this use case.

Procedure

Step 1

Log in to your Azure account.

Step 2

In the left side bar, click All services.

Step 3

In the All services filter bar at the top, search for "subscriptions" and click Subscriptions.

Step 4

Create a subscription.

Provide all the required information to create a subscription.

Step 5

Create a new application.

This step is required for Unmanaged tenants only. If you are planning to add this tenant as a Managed tenant, you only need the subscription ID and can skip this step.

  1. In the left side bar, click All services.

  2. In the All services filter bar at the top, search for "registrations" and click App registrations.

  3. In the main window, click +New registration.

  4. In the Register an application screen, provide the information for your application.

  5. Make a note of the Application (client) ID and Directory (tenant) ID fields values.

  6. Click the Certificates & secrets, then click +New client secret.

    Provide the secret's description and duration.

    Once the secret is created, note the value.

    Note 

    The secret's value is only viewable immediately after you create it.


Cloud Site CIDR Information

Each VRF you define creates a VPC in Amazon Web Services or a VNET in Azure. CIDR is a cloud context profile configuration linked to the VRF and is broken up into one or more subnets used by your cloud endpoints. You will need to provide the CIDR and subnet information when you configure VRF.

Keep in mind that while you can define one or more subnets within a CIDR in AWS, you would need to define at least 2 subnets in Azure. This is because when you create subnets in Azure, one subnet is always used as a gateway subnet, so you would need an additional subnet for the endpoints.

In AWS, subnets are linked to availability zones (AZ) and you will need one subnet per availability zone.

Cloud Site CIDR Information

Example

Your Entry

CIDR prefix (AWS VPC or Azure VNET) and netmask

3.3.0.0/16

Subnet information

Endpoints subnet:

3.3.2.0/24

(Azure only) Gateway subnet:

3.3.1.0/24

Endpoint information

3.3.2.1/24

Creating a Tenant

Use the following procedure to create a Tenant and associate it with your on-premises and cloud sites.

Before you begin

  • You must have AWS account or Azure cloud services subscription active and available.

  • If you are creating a brand new tenant for use with AWS, there is a one-to-one mapping between AWS user accounts and APIC tenants, so you must have a separate AWS user account created and ready to be used by the tenant. For more information, see Setting Up an AWS Account and User.

Procedure


Step 1

Log in to your Multi-Site Orchestrator GUI.

Step 2

In the left navigation menu, click Tenants.

Step 3

In the main pane, click Add Tenant.

Step 4

In the Add Tenant window, provide a name for the tenant.

You may also choose to provide a description of the tenant.

Step 5

In the Associated Sites area, select the on-premises site where you want to add the tenant.

When associating with an on-premises site, simply check the checkbox next to the site.

(Optional) If you want to assign the tenant to a specific security domain, you can choose it from the dropdown menu.

Step 6

If you want to add this tenant to an AWS site, check the checkbox next to it.

When associating an AWS cloud site with a tenant, you must also provide the AWS user account information.

  1. After you check an AWS site, select the security domain from the dropdown list if necessary.

  2. Then click Associate Account next to it.

  3. In the AWS Account ID field, provide the ID of the AWS user account you have created for this tenant.

    This is the AWS account that you logged into when setting up the AWS account for Trusted Tenant using the CFT.

  4. In the Access Type field, choose the type of AWS user account you have created.

    • Select Trusted, if you set up the AWS account for Trusted Tenant using CFT.

    • Select Untrusted, if you set up the AWS account for an Untrusted User Tenant using the AWS access key ID and secret access key. In this case you must also provide the following:

      • Cloud Access Key ID: Enter the AWS access key ID information for the user tenant in this field.

      • Cloud Secret Access Key: Enter the AWS secret access key information for the user tenant in this field.

Step 7

If you want to add this tenant to an Azure site, check the checkbox next to it.

When associating an Azure cloud site with a tenant, you must also provide the Azure subscription information.

  1. After you check an Azure site, select the security domain from the dropdown list if necessary.

    Note 

    Security domain must be specified if you plan to share a subscription that is already used by another tenant. In that case, both tenants must be assigned to the same security domain.

  2. Then click Associate Account next to it.

  3. Choose tenant mode.

    You can choose one of the following two modes when adding a tenant:

    • Choose Mode: Select Shared, if you want to use an existing subscription that is shared with an existing tenant.

      Unlike AWS user accounts, where there is always a one-to-one mapping between AWS accounts and Cloud APIC tenants, Azure allows you to create multiple tenants using the same subscription.

      If you choose Select Shared, you can then select a subscription from the dropdown list and your new tenant will be associated with the same Azure subscription. Note that you must have a security domain configured for the tenants that share the subscription for it to show up in the dropdown list.

    • Choose Mode: Create Own, if you want to associate the tenant with a new Azure subscription.

      Then in the Azure Subscription ID field, provide the ID of the Azure subscription.

      You can obtain the subscription ID by logging into your Azure account and navigating to Home > Subscriptions. Keep in mind, you must use the Subscription ID and not Subscription Name as listed in the Azure portal.

  4. In the Access Type field, choose the access type between the Cloud APIC VM and the tenant.

    • Select Managed Identity, to allow the Cloud APIC VM to manage the cloud resources.

    • Select Unmanaged Identity, to manage the cloud resources via a specific application. In this case you must also provide the application's credentials to the Cloud APIC:

      • Application ID: Enter the application ID for the Azure application. This ID is listed in Home > App registrations > <application-name> > Application (client) ID field in the Azure portal.

      • Client Secret: Enter the application secret. You can create a secret under Home > App registrations > <application-name> > Certificates & secrets > New client secret.

      • Azure Active Directory ID: Enter the application directory ID for the Azure application. This ID is listed in Home > App registrations > <application-name>, in the Directory (tenant) ID field.

Step 8

In the Associated Users area, select which users have access to the tenant

Step 9

(Optional) Enable consistency checker.

You may choose to enable scheduled consistency checker for this tenant. Additional information about consistency check is available in the Cisco ACI Multi-Site Configuration Guide.

Note 

Consistency checker is available only for on-premises fabrics.

Step 10

Click Save to add the tenant.

Step 11

Verify that the tenant was successfully pushed to the on-premises APIC site:

  1. Log into your on-premises APIC site.

  2. On the menu bar, choose Tenants > All Tenants.

  3. In the main pane, verify that the tenant you created in the previous step is displayed in the on-premises APIC site.

Step 12

Verify that the tenant was successfully pushed to the Cloud APIC site:

  1. Log into your Cloud APIC site.

  2. On the main Cloud APIC page, under Application Management, click Tenants.

  3. Verify that the tenant that you just created through the ACI Multi-Site Orchestrator in the previous step is displayed in the Cloud APIC site.

    You may need to click the Refresh button at the top right corner of the screen before your new tenant is displayed.


Creating a Schema and Templates

Use the following procedure to create a new schema and templates for this use case. We recommend creating a separate template for each site and another template for objects that are stretched between multiple sites.

Procedure


Step 1

In the main menu, click Schemas.

Step 2

On the schema screen, click Add Schema.

Step 3

Specify a name for the schema.

At the top of the Untitled Schema screen, click the schema name to edit it. Then provide a descriptive name for the schema, for example cloud-apic-example).

Step 4

Create and name the templates.

We recommend creating separate templates for the on-premises site, the cloud site, and the stretched objects.

  1. Add the templates by clicking the + icon next to the Templates heading

  2. Mouse over the default name (for example, Template 1) and click the Edit icon next to it

  3. Provide a new name for each template.

    For example, template-onprem, template-aws, template-azure, or template-stretched.

Step 5

For each template you have created, select a tenant.

  1. Select a template.

  2. In the middle pane click + To build your schema please click here to select a tenant.

  3. In the right sidebar, select a tenant from the Select a Tenant dropdown.


Associating Templates with Sites

Use the following procedure to associate the templates with the appropriate sites.

Procedure


Step 1

In the left pane, click the + icon next to Sites.

Step 2

In the Add Sites window, add the on-premises site and the Cloud APIC site to the schema by putting a check in the box next to each.

Step 3

From the Assign to Template drop-down next to each site, select the appropriate templates.

For the cloud site, select the following templates:

  • The template for the cloud site (for example, template-cloud)

  • The template for the contract and VRF that will be stretched between the on-premises ACI site and the cloud site (for example, template-stretched)

For the on-premises site, select the following templates:

  • The template for the on-premises site (for example, template-onprem)

  • The template for the VRF that will be stretched between the on-premises ACI site and the cloud site (for example, template-stretched)

Step 4

Click Save.


Configuring VRFs for L3Out Cloud EPG

This section describes how to create or import VRFs that will be used by the cloud EPG and the on-premises L3Out. You can choose to use the same VRF that is used by the on-premises L3Out, in which case the VRF will be stretched between the sites; or you can choose to create a separate VRF for the cloud EPG, in which case you will need to create 2 separate VRFs from the Multi-Site Orchestrator.

Procedure


Step 1

Select the template where you want to add the L3Out VRF.

If you plan to use a single VRF for the cloud EPG and on-premises L3Out, configure it in the stretched template (for example template-stretched).

If you plan to create separate VRF for the cloud EPG, select the template you created for the on-premises site (for example, template-onprem.

Step 2

Create or import the L3Out VRF.

If the L3Out VRF already exists in your on-premises site, we recommend importing it. To import the VRF:

  1. In the middle pane, click Import next to the Tenant you added.

  2. From the Import dropdown, select the on-premises site.

  3. In the Import from <site> window, select VRF.

  4. Check the L3Out VRF you want to import.

  5. Click Import.

If the VRF doesn't already exist, you can create it from the Orchestrator. To create the VRF:

  1. In the middle pane, scroll down until you see the VRF area, then click + in the dotted box.

  2. In the right pane, enter the VRF name in the Display Name field (for example, vrf-l3out).

  3. Click Save.

Step 3

(Optional) Create a separate VRF for the cloud EPG.

You can use the same VRF for your cloud EPG as the L3Out VRF you have imported or created in the previous step. You can also create a separate VRF for the cloud EPG. If you plan to use a single stretched VRF for your cloud EPG and on-premises L3Out, you can skip this step.

  1. Select the cloud template where you want to create the VRF.

    Since you're creating a separate VRF for your cloud EPG, select the template you created for the cloud site.

  2. In the middle pane, scroll down until you see the VRF area, then click + in the dotted box.

  3. In the right pane, enter the VRF name in the Display Name field (for example, vrf-cloud).

  4. Click Save.


Configuring Cloud Region and CIDR

After you add a cloud site to your schema, you can associate a CIDR with the cloud VRF.

Procedure


Step 1

In the left pane, select the template under the cloud site that you have added.

Because you configure the CIDR information at the site-local level, you must select the template under the Sites category on the left, not from the general Templates category.

Step 2

In the middle pane, scroll down to the VRF area, then click the VRF you created.

Step 3

In the right pane, under the Site Local Properties click Regions + to add a region. Then select the region from the dropdown menu.

Step 4

In the right pane, under the Site Local Properties click + CIDR).

Step 5

Click Save.

Step 6

Enter the CIDR information for the VRF.

If it's the first CIDR you are adding for the region, select Primary. Otherwise, select Secondary.

Step 7

Click +Subnet to add a subnet to the CIDR.

Note 

The subnets you configure for your cloud site must be different from the subnets you configure for the on-premises bridge domain.

If you are configuring this for an AWS cloud, you can provide one or more subnets. In addition, if you have configured more than one availability zone for your AWS site, you must add one subnet per availability zone.

If you are configuring this for an Azure cloud, you must provide at least two different subnets. In this case, you will also have to designate one of the subnets to be used as the gateway subnet while the other subnets can be used for the cloud endpoints.

For each subnet you're adding, specify the subnet information that you have prepared in Cloud Site CIDR Information.

Step 8

Click SAVE.


Creating a Filter for L3Out Contract

This section describes how to create a filter for the contract that will be used between the cloud EPG and the on-premises L3Out.

Procedure


Step 1

Select the template where you want to create the filter.

We recommend choosing the stretched template for this example.

Step 2

In the middle pane, scroll down to the Filter area, then click + to create a filter.

Step 3

In the right pane, enter the filter name in the Display Name field (for example, l3out-filter).

Step 4

In the right pane, click + Entry.

Step 5

In the Add Entry window, provide the filter details

In the Name field, provide the name for the filter entry (for example, tcp).

In the Ethertype field, select ip.

In the IP Protocol field, select tcp.

Configure any additional settings as relevant to your deployment.

Step 6

Click SAVE to save the filter.


Creating a Contract for Shared L3Out

This section describes how to create a contract that will be used between the cloud EPG and the on-premises L3Out.

Procedure


Step 1

Select the template where you want to create the contract.

We recommend choosing the stretched template for this example.

Step 2

In the middle pane, scroll down to the Contract area, then click + to create a contract.

Step 3

In the middle pane, locate the Contract area, then click + to create a contract.

Step 4

In the right pane, enter the contract name in the Display Name field (for example, contract-shared-l3out).

Step 5

In the right pane, select tenant for the contract's scope.

Step 6

In the right pane, scroll down to the Filter Chain area and click + Filter to add a filter to the contract.

Step 7

In the Add Filter Chain window that opens, select the filter you added in previous section from the Name dropdown menu.


Creating Application Profile and Cloud EPG

This section describes how to create an Application Profile and a cloud EPG.

Procedure


Step 1

In the left side bar, select the correct template.

If you created a separate template for cloud objects (for example, template-cloud), create the EPG in that template.

Step 2

In the middle pane, locate the Application profile area, then click + Application Profile.

Step 3

In the right pane, enter the Application Profile name in the Display Name field (for example, app1).

Step 4

In the middle pane, click + Add EPG.

Step 5

In the right pane, enter an EPG name in the Display Name field (for example, epg-cloud).

Step 6

In the right pane, scroll down to the Cloud Properties section.

Step 7

From the Virtual Routing & Forwarding dropdown, select the cloud VRF you created.

Step 8

Configure the endpoint selector for the EPG as described in the next section.


Adding Cloud Endpoint Selector

On the Cloud APIC, a cloud EPG is a collection of endpoints that share the same security policy. Cloud EPGs can have endpoints in one or more subnets and are tied to a CIDR.

You define the endpoints for a cloud EPG using an object called endpoint selector. The endpoint selector is essentially a set of rules run against the cloud instances assigned to either AWS VPC or Azure VNET managed by the Cloud APIC. Any endpoint selector rules that match endpoint instances will assign that endpoint to the Cloud EPG.

Unlike the traditional on-premises ACI fabrics where endpoints can only belong to a single EPG at any one time, it is possible to configure endpoint selectors to match multiple Cloud EPGs. This in turn would cause the same instance to belong to multiple Cloud EPGs. However, we recommend configuring endpoint selectors in such a way that each endpoint matches only a single EPG.

Configuring actual endpoints is described in the following two sections:

Procedure


Step 1

In the Multi-Site Orchestrator, select the EPG.

Step 2

In the right pane, in the Site Local Properties area, click + Selector under the Selectors heading to configure the endpoint selector.

If you plan to stretch this EPG, you can also choose to add the endpoint selector at the template level instead.

Step 3

In the Add New End Point Selector form, enter a name in the End Point Selector Name field, based on the classification that you use for this endpoint selector.

For example, for an endpoint selector with the IP Subnet classification, you might use a name such as IP-Subnet-EPSelector.

Step 4

Click + Expression, then use the three fields to configure the endpoint selector based on how you want to classify the endpoints in the cloud:

The Type field determines the expression that you want to use for the endpoint selector:

  • Choose IP Address if you want to use an individual IP address or a subnet for the endpoint selector.

    Note 

    If the endpoints are Azure scale sets and the selector is IP based, the selector must exactly match the subnet where the scale set is placed. For example, if you configured 10.1.0.0/16 CIDR, 10.1.0.0/24 subnet, and the scale set is in this subnet, then the IP selection must match 10.1.0.0/24 exactly and not a wider mask such as 10.1.0.1/32.

  • Choose Region if you want to use the cloud region for the endpoint selector, then choose the specific region that you want use.

    When you select Region for the endpoint selector, every instance within the tenant that is brought up in that region will be assigned to this cloud EPG.

  • Choose Zone if you want to use the Amazon Web Services availability zone for the endpoint selector, then choose the specific zone that you want use.

    When you select Zone for the endpoint selector, every instance within the tenant that is brought up in that zone will be assigned to this cloud EPG.

    Note 

    This selector type is supported only for AWS cloud sites.

  • Choose Custom tags or labels if you want to create a custom tag or label for the endpoint selector. Start typing to enter the custom tag or label, then click Create on the new field to create a new custom tab or label.

The Operator field determines the relation between the type and its value:

  • Equals: Used when you have a single value in the Value field.

  • Not Equals: Used when you have a single value in the Value field.

  • In: Used when you have multiple comma-separated values in the Value field.

  • Not In: Used when you have multiple comma-separated values in the Value field.

  • Has Key: Used if the expression contains only a key.

  • Does Not Have Key: Used if the expression contains only a key.

The Value field determines the collection of endpoints that you want to use for the endpoint selector, based on the choices that you made for the two previous fields. This can be a single IP address, a subnet, AWS region or zone, or a custom tag value.

For this use case, you will be assigning endpoints based on IP subnets, so you will configure the endpoint selector using the following example values:

  • Type: IP Address

  • Operator: Equals

  • Value: 3.3.1.0/24

Step 5

Click the checkmark next to the new endpoint selector.

Step 6

Click Save in the Add New End Point Selector form.


Configuring Contract Between Cloud EPG and External EPG

This section describes how to configure an external EPG to allow your cloud end points to use the on-premises L3Out.

Procedure


Step 1

Create External EPG.

  1. Select the appropriate template.

If you created a separate template for the on-premises objects, create the external EPG in that template.

  1. In the middle pane, scroll down to External EPG and click the + to add an external EPG.

  2. In the right pane, select ON-PREM from the Select Site Type menu.

  3. In the Display Name field, enter the external EPG's name (for example, l3out-on-prem).

  4. From the Virtual Routing & Forwarding dropdown, select the VRF used by the on-premises L3Out.

  5. In the On-Prem Properties area, click +Subnet to add a classification subnet.

    An Add Subnet windows opens.

  6. Specify the subnet that should be advertised into the on-premises fabric.

  7. Check the Shared Route Control Subnet.

  8. Click Save to finish adding the subnet.

Step 2

Add the contract to the external EPG.

  1. In the middle pane, select the external EPG you created.

  2. In the right pane, scroll down to the Common Properties area and click +Contract.

  3. In the Add Contract window that opens, select the contract you created and its type, then click SAVE.

    In this case it should not matter which EPG is selected as the provider or the consumer. However, you must select one as the provider and the other one as the consumer.

Step 3

Add the contract to the cloud EPG.

  1. In the middle pane, select the cloud EPG you created.

  2. In the right pane, scroll down to the Common Properties area and click +Contract.

  3. In the Add Contract window that opens, select the contract you created and its type, then click SAVE.

    In this case it should not matter which EPG is selected as the provider or the consumer. However, you must select one as the provider and the other one as the consumer.

Step 4

Configure the site-local properties for the external EPG.

  1. From the left sidebar, scroll down to SITES and select the template under your on-premises site.

  2. In the middle pane, select the external EPG you created.

  3. In the right sidebar, scroll down to Site Local Properties and select the on-premises L3Out from the L3Out dropdown menu.

    This is the L3Out that is configured in your on-premises fabric.

Step 5

In the top right corner, click SAVE to save the schema.


Deploying to Sites

Once you have completed all of the other configuration tasks, deploy the templates you have configured to the sites.

Procedure


Step 1

Click on the Deploy to Sites button at the top right corner of the screen to deploy the templates to the sites.

Confirmation window will appear.

Step 2

Confirm the deployment.

The confirmation window lists the changes that will be made for each site. After you confirm the deployment, you should see a message saying Successfully Deployed.


Endpoints in AWS Cloud

This task describes how to create an AWS cloud endpoint (VM) with appropriate endpoint selector information that you defined when creating the cloud EPG in the Multi-Site Orchestrator.

Procedure


Step 1

Log in to the Amazon Web Services account.

Step 2

In the AWS Management Console, click All services.

Step 3

From All services, select Computer > EC2.

Step 4

Click Launch Instance to create a new instance (VM).

Step 5

Then select the type of instance you want to create and provide the required information.

Based on the endpoint selector you have chosen for the cloud EPG you created, specify one or more of the following parameters for the EC2 instance:

  • If you plan on assigning endpoints based on an IP subnet, use the CIDR and subnet information you have specified in the endpoint selector.

  • If you plan on assigning endpoints based on an Amazon Web Services region or zone, configure an appropriate Availability Zone for each instance.

    For example, you would use us-west-1 for AWS region or us-west-1a for an availability zone.

  • If you are assigning endpoints based on a custom tag or label, select the Tags tab and click Add/Edit Tags to create a new tag.

    Then enter the same value you chose in the Value field of the endpointer selector.


Endpoints in Azure Cloud

This task describes how to create an Azure cloud endpoint (VM) with appropriate endpoint selector information that you defined when creating the cloud EPG in the Multi-Site Orchestrator.

Procedure


Step 1

Log in to the Azure account.

Step 2

Navigate to Home > All services > Virtual Machines.

Step 3

Click +Add to create a new virtual machine.

Step 4

In the Create a virtual machine screen, provide the appropriate information based on the endpoint selector you created.

Provide all the required information, such as virtual machine name, size, administrator account, etc.

In the Subscription dropdown, select the subscription where you created your tenant.

If you are assigning endpoints based on an IP subnet, choose the subnet created by the Multi-Site Orchestrator.

If you plan on assigning endpoints based on a custom tag or label, choose a VM, then click the Tags tab on the left. Use an existing tag in this area, or click Add/Edit Tags to create a new one. You will use the entry in the Value field for this tag for the custom tag or label for the endpoint selector.


Verifying Shared L3Out Configuration

Use the following procedure to verify that the cloud EPG and on-premises L3Out have been properly configured.

Procedure


Step 1

In the Cloud APIC GUI: Verify that the on-premises connectivity was properly establish on the Cloud APIC site.

In the Dashboard view's Intersite Connectivity Status, verify the following:

  • IPsec Tunnels between the on-premises and cloud CSR are up.

  • OSPF neighbors are up.

  • BGP Sessions are up.

Step 2

In the Cloud APIC GUI: Verify that the application profile, the cloud EPG, and VRF were created on the Cloud APIC site.

  1. Navigate to Application Management > Application Profiles and verify that the application profile has been created.

  2. Navigate to Application Management > EPGs and verify that the EPG has been created.

  3. Navigate to Application Management > VRFs and verify that the VRF has been created.

Step 3

In the Cloud APIC GUI: Verify that the end points were deployed successfully for your EPG on your Cloud APIC site:

  1. Navigate to Application Management > EPGs and verify that the EPG has been created.

  2. In the Name column, locate the EPG that you created earlier, then locate the entry under the Endpoints column for this EPG.

    The number shown in this column should match the number of endpoints that you have for this EPG. You might have to click the Refresh button at the top right corner of the screen (the circle with an arrow) to refresh the screen before the number is displayed properly in this column.

  3. Click the number in this Endpoints column to bring up more information on the endpoints for this EPG.

  4. Verify that the information that you used in the endpoint selector is being used for this endpoint.

Step 4

In the Cloud APIC GUI: Verify that the cloud EPG has the correct contract configured.

  1. Navigate to Application Management > EPGs and click on the cloud EPG you created.

  2. In the Application Management tab, verify that the contract you configured is associated with the EPG.

Step 5

In the Cloud APIC GUI: Verify that the the L3Out and the external EPG were were created.

Step 6

In the on-premises APIC GUI:: Verify that the Tenant, VRF, and external network that you configured in the Multi-Site Orchestrator were properly configured in the on-premises APIC.

  1. Click on the Tenants tab and verify that the tenant was correctly pushed to the on-premises site.

  2. Navigate to Tenants > <tenant-name> > Networking > External Routed Networks > <on-prem-l3out> > Networks > <external-network-instance-profile> and verify that the classification subnet is configured correctly.

    In the External Network Instance Profile screen, verify that the classification subnet is visible in the Subnets list.

    Double click the subnet and verify that the External Subnets for the External EPG and Shared Route Control Subnet checkboxes are checked.

  3. In the External Network Instance Profile screen, select Policy > Contracts > Provided Contracts tab and verify that the L3Out contract is displayed.

  4. Navigate to Tenants > <tenant-name> > Networking > External Routed Networks > Match Rules for Route Maps > <match-rule> and verify that the Match Prefix contains the correct subnet.

Step 7

In the on-premises APIC GUI:: Verify that the shadow EPG for your cloud EPG was correctly created.

  1. Navigate to Tenants > <tenant-name> > Networking > External Routed Networks > <l3out> > Networks > <external-network-instance-profile> and verify that the cloud EPG shadow object is created.

    In the External Network Instance Profile of the cloud EPG's shadow EPG, verify that the cloud subnet for your contract is displayed. If you configured the endpoint selector as something other than subnet, then individual endpoints will be displayed.

  2. In the External Network Instance Profile screen, select Policy > Contracts tab. Then verify that the L3Out contract is displayed under either the Consumed Contracts or Provided Contracts category.