Product Documentation

Configuring the Virtual Path Service Between the MCN and Client Sites

The next step is to configure the Virtual Path Service between the MCN and each of the client (branch) sites. To do this, you will use the configuration forms and settings available in the Connections section configuration tree of the Configuration Editor.

To configure the Virtual Path Service between the MCN and a client site, do the following:

  1. Continuing in the Configuration Editor, click the Connections section heading.

    This reveals the Connections section configuration tree.

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  2. Click + to the left of the MCN site name in the Connections section tree.

    This opens the MCN site branch in the Connections configuration tree.

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  3. Click + next to the Virtual Paths branch label.

    This opens the Virtual Paths configuration section (child branch) for the MCN site branch in the tree. This section provides settings and forms for configuring the Virtual Path Service between the MCN and each of the Virtual WAN client sites.The below figure shows an example Virtual Paths section for an MCN site.

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    The Virtual Paths section contains the following child branches:

    • Dynamic Virtual Paths – (Optional) The settings in this section allow you to enable and disable Dynamic Virtual Paths, and set the maximum allowable Dynamic Virtual Paths for the site. Dynamic Virtual Paths are Virtual Paths that are established directly between sites, based on a configured threshold. The threshold is typically based on the amount of traffic occurring between those sites. Dynamic Virtual Paths are operational only after the specified threshold is reached. Dynamic Virtual Paths are not required for normal operation, so configuring this section is optional.

    • <MCN_Site_Name>_<Client_Site_Name> – The system initially automatically adds a static Virtual Path between the MCN and a client site, as this Virtual Path is required. The name for the path uses the following form:

      <MCN_Site_Name>_<Client_Site_Name>

      Where:

      • MCN_Site_Name is the name of the MCN for this Virtual WAN.

      • Client_Site_Name is the name of a client site identified in the current configuration package.

    User-configurable default settings are initially applied to the static Virtual Path, as defined in the Default Sets > Virtual Path Default Sets section of the Connections configuration tree. However, you can customize or add to the defined Default Sets, and also customize the configuration for a specific site and Virtual Path.

    Note

    To add more static Virtual Paths for a site, you must do so manually. Instructions for manually adding a static Virtual Path are included in the steps below.

  4. Click + next to the name of the static Virtual Path in the Virtual Paths tree.

    This reveals additional child branches (configuration sets) for the static Virtual Path, as follows:

    • Local Site – This section enables you to view and configure the Virtual Path settings from the perspective of a local site. You can also view, customize, and add Classes or Rules as required for this specific Virtual Path. You can also add Virtual Paths to the local site, as needed.

    • Remote Site – This section enables you to view and configure the Virtual Path settings from the perspective of a remote site. As for the Local Site section, you can also view, customize, and add Class or Rules as required for this specific Virtual Path. You can also add Virtual Paths to the remote site, as needed.

    • Paths – This section provides settings and forms for configuring the Virtual Paths and Virtual Path Service between the MCN and the client site.

      The below figure shows an example MCN static Virtual Path branch and child branches.

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  5. Click + next to the Paths branch label, or click Paths if no + icon is present.

    The system is able to automatically generate Virtual Paths for some WAN Links. If so, there will be a plus sign (+) to the left of the Paths child branch label. If the + icon is not present, click the Paths label directly. This reveals the Add (+) button for adding a Virtual Path. The Add icon is located to the right of the Paths branch label.

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  6. Click + (Add) to the right of the Paths branch label.

    This displays the Add Path dialog box (configuration form).

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  7. Specify the source and destination site information for the new Virtual Path.

    Specify the following from the available drop-down menus:

    Note

    Depending on how the WAN links are configured for the sites, some fields will be read-only. Fields that are configurable provide a drop-down menu of the available selections.

    • From Site – This is the source site for the Virtual Path. For the required static Virtual Path, this is configured as the MCN site by default.

    • From WAN Link – This is the originating WAN Link for the Virtual Path.

    • To Site –  This is the destination site for the Virtual Path.

    • To WAN Link – This is the destination WAN link for the Virtual Path.

  8. Click Add.

    This adds the configured Virtual Path to both the MCN and the associated client site in the Connections tree. This also automatically opens the Paths settings configuration form for the From Site for the Virtual Path (in this case, the MCN).

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  9. Click Edit (pencil icon), to the right of the MCN-to-client Virtual Path label.

    This opens the Virtual Path Service configuration form for editing.

  10. Configure the settings for the Virtual Path, or accept the defaults.

    The Paths configuration form contains the following settings:

    • From Site section:

      • Site – This is the source site for the Virtual Path. For the required static Virtual Path, this is configured as the MCN site by default.

      • WAN Link – This is the originating WAN Link for the Virtual Path.

    • To Site section:

      • Site – This is the destination site for the Virtual Path.

      • WAN  Link – This is the destination WAN link for the Virtual Path.

    • Reverse Also  – Select this checkbox to enable Reverse Also for this Virtual Path. If enabled, the system automatically builds a Virtual Path in the opposite direction of the configured path, using the same WAN links as configured for the original path.

    • IP DSCP Tagging – Select a tag from the drop-down menu. This specifies the DSCP tag to set in the IP header for traffic traveling over this Virtual Path.

    • Enable Encryption – Select this checkbox to enable encryption of packets sent along this Virtual Path.

    • Bad Loss Sensitive – Select a setting from the drop-down menu. The options are:

      • Enable– (Default) If enabled, paths will be marked BAD due to loss, and will incur a path scoring penalty.

      • Disable – Disabling Bad Loss Sensitive can be useful when the loss of bandwidth is intolerable.

      • Custom – Select Custom to specify the percentage of loss over time required to mark a path as BAD. Selecting this option reveals the following additional settings:

      • Percent Loss (%) – This specifies the percentage of loss threshold before a path is marked BAD, as measured over the specified time. By default, the percentage is based on the last 200 packets received.

      • Over Time (ms) – Specify the time period (in milliseconds) over which to measure packet loss. Select an option between 100 and 2000 from the drop-down menu for this field.

      • Silence Period (ms) – This specifies the duration (in milliseconds) before the path state transitions from GOOD to BAD. The default is 150 milliseconds. Select an option between 150 and 1000 from the drop-down menu for this field.

      • Path Probation Period (ms) – This specifies the wait time (in milliseconds) before a path transitions from BAD to GOOD. Select an option between 500 and 60000 from the drop-down menu for this field. The default is 10000 milliseconds.

      • Instability Sensitive – Select this checkbox to enable. If enabled, latency penalties due to a path state of BAD and other latency spikes are considered in the path scoring algorithm.

      • Tracking IP Address – Enter a Virtual IP Address on the Virtual Path that can be pinged to determine the state of the path.

      • Reverse Tracking IP Address – If Reverse Also is enabled for the Virtual Path, enter a Virtual IP Address on the path that can be pinged to determine the state of the reverse path.

  11. Click the minus sign () to the left of the path label to close the settings form.

    This reveals that the two new From Site and To Site Virtual Paths between the MCN and the client site have been added to the tree.

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  12. Repeat the steps above for each branch you want to connect to the MCN.

  13. (Optional) When you finish adding and configuring all of the Virtual Paths to and from the MCN, click the minus sign (–) to the left of the MCN branch label to close the branch.

    Next, you have the option of customizing the Virtual Paths configurations for the client sites, as well as adding and configuring additional paths between clients. Instructions are provided in the remaining steps, below.

  14. Click + to the left of the client site branch label in the tree.

    This opens the client site branch in the Connections tree.

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  15. Drill down to the Paths settings configuration form for any client site Virtual Path you want to configure.

    To navigate to the Paths settings form for the client site, do the following:

    • Click + to the left of the branch label for the client site.

    • Click + to the left of the Virtual Paths.

    • Click + to the left of the branch label for the Virtual Path you want to configure.

    • Click + to the left Paths.

    The below figures shows an example Paths settings form for the new From Site path added in the previous steps.

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  16. Configure the settings for each path you want to customize.

    Follow the same steps as you did to configure the Virtual Paths for the MCN site.

  17. ( Optional) Click the minus sign (–) to the left of the client site branch label.

    This closes the configured client site branch in the tree.

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    This completes the basic configuration of the Virtual Paths between the client sites and the MCN.

    Note

    For information on configuring additional settings in the Connections or Provisioning sections of the Configuration Editor, please refer to the Management Web Interface online help for those sections. If you do not want to configure these settings at this time, you can proceed to the appropriate step indicated below.

    The next step depends on the SD-WAN Edition license you have activated for your deployment, as follows:

Configuring the Virtual Path Service Between the MCN and Client Sites

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