Prestaging Devices Process Overview
After Junos Space has discovered the devices, a two- or three-stage process to prestage devices is performed automatically in the backend by the Connectivity Services Director application. The following events occur in a sequential manner for preparing the devices to be compatible and qualified for configuration of services:
- Discover roles. In this stage, the Junos Space software searches the database for N-PE devices that have not yet been assigned.
- Examine the results of the role discovery and make any
exceptions to the system recommendations. Specifically, you might:
Exclude specified devices from N-PE role assignment.
You might need to exclude a device that you know is not a PE device. For example, Provider (P) devices that have loopback addresses pass the rules for N-PE role assignment. For devices that you know are not PE devices, you can edit the configuration out-of-band, and then run role discovery again.
Select a different loopback address for a device.
Exclude interfaces from UNI assignment.
- Confirm the assignments.
When device assignments are confirmed internally by the Connectivity Services Director application, those devices are removed from the list of recommendations. If, initially, you exclude devices from assignment, you can return to the list of recommendations later and make further assignments.
When you add more devices to your network, the role discovery operation runs again. Running role discovery again overwrites any devices remaining in the role discovery results list of recommended assignments, but has no effect on devices with confirmed assignments.
The Prestage Devices screen shows a device inventory of N-PE routers that Connectivity Services Director has discovered in its database that have not yet been assigned. You can perform the following operations from the Prestage Devices screen:
Select multiple devices to assign roles—The most common and recommended prestaging workflow is to select all devices in the Assign Roles screen and assign them all. See Discovering and Assigning All N-PE Devices for step-by-step instructions for assigning all Junos Space recommendations.
Select a single device to assign a role—You must select a single device to change the the UNI assignments on that device. For step-by-step instructions on changing UNI assignments, see Excluding Interfaces from UNI Role Assignments.
You can also exclude a single device using this screen.
Exclude specified devices from the N-PE role. See Discovering and Assigning N-PE Devices with Exceptions for step-by-step instructions.
The Manage Interface Roles screen is an inventory of UNI-qualified interfaces for a specific discovered device. You can view a separate Manage Interface Roles screen for each discovered N-PE device. You can also exclude multiple interfaces from qualification as UNIs. For step-by-step instructions on excluding interfaces from the list of qualified UNIs, see Excluding Interfaces from UNI Role Assignments.
Note The UNI role is assigned to an interface by a notification from the managed device that is sent to the Connectivity Services Director application, even when you unassign the UNI role from the interface using the Prestage Devices workspace. For example, if you unassign the UNI role on an interface of a managed device, that interface is available for provisioning services on devices, when you attempt to create a service order. For the same interface, if you configure encapsulation on it directly from the device and navigate to the Prestaging workspace in Connectivity Services Director after a few minutes, the interface status indicates that UNI role is configured on it. This behavior occurs because the UNI role is assigned to the interface by a device notification.
Note After a device is prestaged in Connectivity Services Director, the prestaging job is not initiated on the same device again. When a device notification is received by the application, Connectivity Services Director synchronizes the prestaging database on the UI interfaces. If a mismatch is detected in the UNI status of the interface in Connectivity Services Director database and the UNI status of the interface on the device (caused by the application being down or network accessibility problems), the synchronization of the UNI interface might not occur. In such a case, the synchronization operation occurs when a configuration- commit on the device is done the next time. To manually resolve this discrepancy in the UNI status of the interface, you can unassign the UNI role of the interface, which causes prestaging to perform a synchronization.
The E-LAN service needs to be enabled in a network device, to make the static pseudowire functionality active in the device. You can activate the static pseudowire functionality by configuring the network device through the CLI window. You need to enter the CLI configuration mode of a network element and run the command
set protocols vpls static-vpls no-tunnel-services
commit
If the device is not configured through CLI, a warning message appears in the application server log, that is the JBOSS Log:
<Device name> should be configured with static VPLS no tunnel service rule.
To discover the roles of the various network elements configured:
1. From the View selector, select Service View. The workspaces that are applicable to routing and tunnel services are displayed.
2. Click the Build icon in the Service View of the Connectivity Services Director banner. The functionalities that you can configure in this mode are displayed in the task pane.
3. In the Network Services > Connectivity task pane, select Prestage Devices > Prestage Devices.
4. Click Manage Device Roles and from the drop-down list, select Discover Roles to retrieve the roles of the devices. A dialog box is displayed with the job ID of the discovery job that is created to obtain the latest roles of the devices.
To remove the role of the network elements configured:
1. From the View selector, select Service View. The workspaces that are applicable to routing and tunnel services are displayed.
2. Click the Build icon in the Service View of the Connectivity Services Director banner. The functionalities that you can configure in this mode are displayed in the task pane.
3. From the Network Services > Connectivity task pane, select Prestage Devices > Prestage Devices.
5. Click Manage Device Roles and from the drop-down list, select Unassign Role to remove the role capability of a network element. You are prompted to confirm the operation. If you click OK, a request is submitted to remove the latest role of the network element or device.
The device is removed from the list of network elements displayed on the Devices Chart page.
To resynchronize the role of the network elements configured:
1. From the View selector, select Service View. The workspaces that are applicable to routing and tunnel services are displayed.
2. Click the Build icon in the Service View of the Connectivity Services Director banner. The functionalities that you can configure in this mode are displayed in the task pane.
3. From the Network Services > Connectivity task pane, select Prestage Devices > Prestage Devices.
5. Click Manage Device Roles and from the drop-down list, select Re-sync Role Capability resynchronize the role capability of a network element. You are prompted to confirm the operation. If you click OK, request is submitted to retrieve the latest role of the network element or device.
The role is re-synced with the same device now.