Add a segment action in an AWS Cloud WAN core network policy version - AWS Network Manager
Segment sharingSegment routesService insertion

Add a segment action in an AWS Cloud WAN core network policy version

The following steps guide you through optionally setting segment actions for a core network for a policy version using the Policy versions link on the AWS Network Manager console. Before setting segment actions you must first configure your network settings and add one or more segments. For more information, about segment actions, see Segment actions.

Segment sharing

Create a shared segment between two segments.

Segment sharing is bidirectional by default. When you create a segment share between two segments, routes from both segments are automatically advertised to each other. For example, you might share a segment named test with another segment named dev. Routes from test are advertised to dev, and vice versa. To make routes in shared segments unidirectional, create a deny list filter to share routes from one segment to the other, but not vice versa. Using the previous example, you could make a deny list filter that prevents routes from test being advertised to dev. For more information on creating the deny list for a segment, see Add a segment to an AWS Cloud WAN core network policy version.

To create a shared segment

  1. Access the Network Manager console at https://console.aws.amazon.com/networkmanager/home/.

  2. Under Connectivity choose Cloud WAN.

  3. On the Global networks page, choose the global network ID that for the core network you want to create a policy version for, and then choose Core network.

  4. In the navigation pane, choose Policy versions.

  5. Choose Create policy version.

  6. Choose Segment actions - optional.

  7. (Optional) In the Sharing section, choose Create, and then do the following:

    1. From the Segment dropdown list, choose the core network segment that you want to share.

    2. For the Segment filter, choose whether you want to allow all shared routes from other segments, to allow only selected routes, or to deny selected routes. The default is Allow all.

    3. Choose Create sharing.

Segment routes

Create a segment route for a policy version.

To create a segment route

  1. Access the Network Manager console at https://console.aws.amazon.com/networkmanager/home/.

  2. Under Connectivity choose Cloud WAN.

  3. On the Global networks page, choose the global network ID that for the core network you want to create a policy version for, and then choose Core network.

  4. In the navigation pane, choose Policy versions.

  5. Choose Create policy version.

  6. Choose Segment actions - optional.

  7. (Optional) In the Routes section, choose Create, and then do the following:

    1. From the Segment dropdown list, choose the core network segment that you want to share.

    2. For Destination CIDR Block, enter a static route. You can enter multiple CIDR blocks by choosing Add for each block that you want to add. Choose Remove for any blocks that you don't want.

      Note

      You can't leave any blank destination CIDR blocks. Choose Remove to delete any empty blocks.

    3. Choose Blackhole if you want to "black hole" the route. If you make this choice, you can't add any attachments to the route.

    4. From the Attachments list, choose any attachments that you want to include in this route.

    5. Choose Create segment route.

  8. (Optional) Add Attachment policies. For more information, see Create an attachment policy in an AWS Cloud WAN core network policy version.

  9. Choose Create route.

Service insertion

Create a segment route for a policy version.

To set up service insertion for a segment

  1. Access the Network Manager console at https://console.aws.amazon.com/networkmanager/home/.

  2. Under Connectivity choose Cloud WAN.

  3. On the Global networks page, choose the global network ID that for the core network you want to create a policy version for, and then choose Core network.

  4. In the navigation pane, choose Policy versions.

  5. Choose Create policy version.

  6. Choose Segment actions - optional.

    Note

    You must first have created your segments and network functions group.

  7. If you want to create a service insertion action associated with a network functions group in the Service insertion section, choose Create, and then choose an Action. If you're not creating a service insertion action, this is an optional section.

    Send via

    This Action uses an east-west traffic pattern from attachment to attachment. For example, you might create a policy that directs all traffic between a segment named Production and all other segments via inspection VPC attachments.

    1. For the Mode, choose one of the following:

      • Single hop — This option steers traffic through a single intermediate attachment.

      • Dual hop — Traffic traverses the inserted attachments in both the source and destination core network edges.

    2. For Segment from, choose the source segment.

    3. For Segment to, choose the destination segments.

    4. For Send traffic via, choose the network functions group that you want to use for the service insertion.

    5. (Optional) In Edge overrides, choose Add.

      • From the Edge 1 and Edge 2 drop-down lists, choose the edge locations for the overrides. the service the priority order for the edge locations to route traffic.

      • Choose the Preferred edge drop-down list to choose which edge location you prefer to use.

      • Choose Add to include additional edge overrides.

    Send to

    This Action uses north-south traffic, sending traffic to the security appliance, such as an Inspection VPC or firewall, and then out to the Internet or an on-premises location.

    1. For Segment from, choose the segment coming into the security appliance. For example, you might have a segment named production that you want to first go to a security appliance.

    2. For Segment to, choose one or more segments that traffic will flow to from the security appliance.

    3. For Send traffic via, choose the network functions group that you want to use for the service insertion.

    4. Optional) In Edge overrides, choose Add.

      • From the Edge 1 and Edge 2 drop-down lists, choose the edge locations for the overrides. the service the priority order for the edge locations to route traffic.

      • Choose the Preferred edge drop-down list to choose which edge location you prefer to use.

        • Choose Add to include additional edge overrides.

  8. Choose Create service insertion.

  9. (Optional) Add Attachment policies. For more information, see Create an attachment policy in an AWS Cloud WAN core network policy version.