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    Creating and Viewing SLA-Iterator Profiles

    An iterator periodically transmits service level agreement (SLA) measurement packets as ITU-Y.1731 - compliant frames for two-way delay measurement or loss measurement. For an iterator to form a remote adjacency (pairing of two end points) and to become operational, the continuity check message (CCM) must be active between the CFM local and remote MEP configurations. The OAM application in Connectivity Services Director uses SLA-iterator profiles to collect Y.1731 statistics. These iterator profiles have to be configured before starting performance monitoring. The OAM application discovers already configured SLA-iterator profiles while discovering the OAM devices.

    There are be three predefined SLA-iterator profiles for frame loss, frame delay, and two-way delay measurements, respectively. You can also create SLA-iterator profiles through the user interface. The OAM Insight application manages the association between SLA-iterator profiles and devices it has been deployed. You can attach or detach these SLA-iterator profiles to several devices any time.

    Creating a SLA-Iterator Profile

    You can create an iterator profile with its parameters to periodically transmit SLA measurement packets as ITU-Y.1731-compliant frames for delay measurement or loss measurement. The SLA-iterator profile is saved in the database and appears in the Manage OAM Profiles page with the Service Type column indicating SLA Iterator Profile. You can then open the Actions menu to perform additional tasks, such as deleting or publishing service definitions.

    A wizard is available to create and modify a service order in an intuitive and easily-navigable format. The settings that you can configure in the service order are organized in separate pages of the wizard, which you can launch by clicking the appropriate buttons at the top of the Create or Edit a SLA-Iterator Profile page. Alternatively, you can proceed to the corresponding setting-related pages by clicking the Back and Next buttons at any point in the wizard during the creation of the service order.

    To create a SLA-iterator profile:

    1. From the View selector, select Device View.

      The workspaces that are applicable to this view are displayed.

    2. From the Junos Space user interface, click the Build icon on the Connectivity Services Director banner.

      The functionalities that you can configure in this mode are displayed in the task pane.

    3. From the View pane, click the plus sign (+) beside the My Network item in the View pane to expand the tree and select the device node you want for which you want to create the SLA-iterator profile.

      The device type selected within the device model tree is highlighted.

    4. From the Tasks pane, select the name of the profile that you want to create. To create a SLA-iterator profile for a device, select Profiles > OAM.

      The Manage OAM Profiles page is displayed.

    5. Click the New icon at the top of the page.

      The Select Profile Type dialog box is displayed, listing the types of OAM profiles that you can create for the selected device.

    6. Select the SLA-Iterator Profile radio button from the Select Profile Type dialog box.

      The General Settings page of the SLA-Iterator Profile creation wizard is displayed.

    Configuring the General Settings of an SLA-Iterator Profile

    To define the attributes of an SLA-iterator profile:

    Note: Whenever link-fault management (LFM) with an SLA-iterator profile is configured to mark the interface as down (by including the link-down attribute), the port is placed in the blocked state (STP state). In such a state of the interface, data traffic is not transmitted out on that interface. Because the connectivity-fault management (CFM) downstream maintenance MEPs come up on blocked ports, the CFM sessions come up properly. However, the interface is down and the interface status TLV does not contain the correct status. Only if you configure the port status TLV, the actual status of the port is reflected. The interface status TLV does not carry the actual state of the port.

    1. On the General Settings page of the wizard, fill in the fields as indicated in the table.

      Field

      Action

      Name

      Specify the name of the SLA-iterator profile.

      Range: 1 through 50. Space and special characters are allowed.

      Cycle time

      Specify the amount of time (in milliseconds) between back-to-back transmission of SLA frames for one connection.

      Range: 10 through 3600000 milliseconds

      Default: 10 milliseconds

      Iteration period

      Specify the maximum number of cycles per iteration (the number of connections registered to an iterator cannot exceed this value) under an iterator profile.

      Range: 1 through 2000 services

      Default: 1 service

      Disable Iterator Profile

      Disables an iterator profile.

      Measurement type

      Specify the type of Y.1731 (SLA measurement) frame to be sent. Select the measurement type from the list:

      • Loss—Use Y.1731-compliant line module (LM) frames for this profile to measure frame loss.
      • Statistical Frame Loss— Use Y.1731-compliant two-way data module (DM) frames for this profile to statistically measure frame loss.
      • Two way delay— Use Y.1731-compliant two-way DM frames for this profile to measure frame loss.
    2. From the General Settings page of the wizard, click Next to proceed to the final step of the wizard, which is to review the configured settings. The Review page of the wizard is displayed.

    Reviewing the Configured SLA-Iterator Profile Settings

    The Review page of the SLA-iterator profile creation and modification wizards enable you to view and evaluate the service parameters and components you configured in preceding steps or pages of the wizard. This page provides a comprehensive, single-page view of all the service elements configured in the different pages of the wizard. You can either click the buttons corresponding to the various settings at the top of the wizard page to directly traverse to the page you want to modify or click the navigation buttons at the bottom of the wizard page to go to the different pages of the wizard.

    To review the configured SLA-iterator profile settings:

    1. Click Review to view the defined parameters. You can examine and modify the created service order parameters. Alternatively, click the corresponding buttons at the top of the wizard page to navigate to the specific pages pertain to the settings you want to modify.
    2. Click Edit next to the section that contains the parameter you want to modify. You are navigated to the corresponding page of the wizard in which the parameter settings are defined.
    3. Click Finish to save the profile. Click Back to return to the previous page of the wizard; else click Cancel to discard the changes. The service order inventory window appears.

      The SLA-iterator profile is saved in the database and appears in the Manage OAM Profiles inventory page. You can then use the icons that are present on that page to perform additional tasks, such as deleting or modifying SLA-iterator profiles, and publishing or unpublishing the profiles.

    Modifying an SLA-Iterator Profile

    On the Manage OAM Profiles page, you can view the collection of previously configured OAM profiles, such as CFM profiles, LFM profiles, RFC2544 test profiles, SLA-iterator profiles, SLA-iterator profiles, or SLA iterator profiles.

    To modify an SLA-iterator profile:

    1. From the View selector, select Device View.

      The workspaces that are applicable to this view are displayed.

    2. From the Junos Space user interface, click the Build icon on the Connectivity Services Director banner.

      The functionalities that you can configure in this mode are displayed in the task pane.

    3. From the View pane, click the plus sign (+) beside the My Network item in the View pane to expand the tree and select the device node you want for which you want to create the SLA-iterator profile.

      The device type selected within the device model tree is highlighted.

    4. From the Tasks pane, select the name of the profile that you want to create. To create an SLA-iterator profile for a device, select Profiles > OAM.

      The Manage OAM Profiles page is displayed.

    5. Select the check box next to the SLA-iterator profile you want to modify, and click the Edit icon above the table of listed OAM profiles.

      The Modify SLA-Iterator Profile wizard is displayed, with the General Settings and Review buttons.

      Note: The Service Type field can be used to identify the different SLA-iterator profiles that are present in the Connectivity Services Director database.

    6. Edit the parameters as needed.
    7. Click Save to save the modified settings.

    Viewing an SLA-Iterator Profile Details

    From the Manage OAM Profiles page, you can view the configuration attributes and properties defined for an SLA-iterator profile. In certain network deployments, before you want to create or modify an SLA-iterator profile, you might require the previously configured SLA-iterator profile details to be viewed for optimal and effective configuration.

    Note: The Service Type field can be used to identify the different SLA-iterator profiles that are present in the Connectivity Services Director database.

    1. From the View selector, select Device View.

      The workspaces that are applicable to this view are displayed.

    2. From the Junos Space user interface, click the Build icon on the Connectivity Services Director banner.

      The functionalities that you can configure in this mode are displayed in the task pane.

    3. From the View pane, click the plus sign (+) beside the My Network item in the View pane to expand the tree and select the device node you want for which you want to create the SLA-iterator profile.

      The device type selected within the device model tree is highlighted.

    4. From the Tasks pane, select the name of the profile that you want to create. To create an SLA-iterator profile for a device, select Profiles > OAM.

      The Manage OAM Profiles page is displayed.

    5. Double-click the SLA-iterator profile for which you want to view.

      The SLA-Iterator Profile Details window is displayed.

      It has two the following two tabs:

      • Profile Details— Displays SLA-iterator profile configuration, such as the measurement type, iteration period, and cycle time
      • Device Details— Displays list of devices attached to this SLA-iterator profile
    6. After you complete viewing the profile parameters, click Close to close the details window and return to the profiles listing page.

      Note: The SLA-iterator profile landing page displays the list of SLA-iterator profiles only in tabular view.

    Modified: 2016-03-01