To configure an LSP Path optimization policy

Purpose

An LSP Path optimization policy allows you to filter LSP Path candidates and set the execution rules to determine the candidacy and priority of an LSP Path for re-signaling. You can define LSP Paths that are eligible for re-signaling and if a path is selected, the LSP Path is added to a candidate list. Execution rules determine the sequence in which the LSP Paths can re-signal and the number of seconds between re-signaling. Execution rules apply to the entire candidate list. Each time that optimization starts, the candidate list is filtered according to the candidate definition values and then resequenced according to the sequencing target and order values.

To ensure that NEs are not overloaded by LSP re-signaling, an LSP Path optimization schedule can be created to identify when re-signaling can be evaluated and executed. You can also manually execute LSP Path optimization schedules. To avoid network congestion and maintain QoS standards, only one policy should be executed at a time. Repetitive re-signaling requests are ignored, including manual or scheduled re-signaling requests. However, a re-signaling request that is initiated from the LSP Path binding properties form executes regardless of whether another LSP optimization policy is in progress.

The NEs notify the NFM-P about the current state and outcome of LSP Path re-signaling. You can access the LSP Path property form to view information about the state of LSP Path optimization. The following parameters are displayed:

The Resignal Eligible parameter indicates whether an LSP Path is eligible for optimization. When the parameter value is true, the LSP Path can be optimized. When the parameter value is false, the LSP Path is not eligible for optimization.
The Last Performed Type parameter indicates how re-signaling was performed. Typically the value is Manual Resignal. However, if a schedule was set, the value is Timer Based Resignal.
The Last Performed parameter indicates the last time the LSP Path was chosen to be re-signaled.
The Last Performed State parameter indicates the re-signal state of a specific LSP Path.

Steps


1	Choose Manage→MPLS→LSP Path Optimization from the NFM-P main menu. The Manage LSP Path Optimization form opens.
2	Choose LSP Path Optimization Policy (Path/Routing Management: MPLS).
3	Click Create and choose Optimization Policy. The LSP Path Optimization Policy (Create) form opens with the General tab displayed.
4	Configure the required parameters.
5	Click on the Candidate Definition tab to apply filters to define eligible LSP Paths for optimization. If no filters are applied, then all eligible LSP Paths will be listed in the Execution Candidates form. Perform one of the following for LSP Path Filters and/or Dynamic LSP Filters. Select an existing filter: Use the following steps: Click on Select beside the Filter Name parameter. A list of filters is displayed. Choose a filter and click OK. The list closes and the Filter Name field is populated with your selection. Create a new filter: Use the following steps: Click on Select beside the Filter Name parameter. A list of filters is displayed. Click Create. The Create LSP Path/Dynamic LSP Filter forms opens. Choose an Attribute and assign an associated Function and Value to it. Click Add. The Attribute and its Function and Value appear in the Filter field. This is the first portion of the string that will be used to filter the execution candidates. Add to the filter string by selecting an operator from the Operators drop-down menu, and then define a subsequent Attribute and its associated Function and Value. Click Add. The Operator and subsequent Attribute (and its associated Function and Value) are added to the filter string in the Filter field. Continue to build the filter string by repeating 5 and 6 , as required. Click Save. The Save Filter dialog box appears. Configure the parameters and click Save. Close the Create Filter form. The newly-created filter appears in the filter selection list. Select the newly-created filter and click OK. The list closes and the Filter Name field is populated with your selection.
6	To further limit the number LSP Paths that will be listed in the Execution Candidate form, define a Rule-Based Group to add only those NEs that contain the LSP Paths that you need include. Perform one of the following: Select an existing group. Use the following steps: Click on Select beside the Group Name parameter. The Select Rule-Based Group form is displayed. Choose a rule-based group and click OK. The list closes and the Group Name field is populated with your selection. Go to Step 7 . Create a new group. Use the following steps: Click on Select beside the Group Name parameter. The Select Rule-Based Group form is displayed. Click Create. The Rule-Based NE Group (Create) forms opens with the General tab displayed. Configure the parameters and click Apply. Click the Group Members tab and click Create. The Select Network Elements list is displayed. Choose the required NEs and click OK. The list closes and the selected NEs are listed in the Group Members tab. Note: If you configured the Order parameter on the General tab in 3 as Ordered Group, then you can only select one NE at a time. When you click OK, the selected NE will appear in the list. To add the next NE in the order, click Create again, choose another NE, then click OK. Repeat as required. Click OK to save your configuration and close the Rule-Based NE Group (Create) form. The newly-created group appears in the Select Rule-Based Group form. Select the new group and click OK. The list closes and the Group Name field is populated with your selection.
7	Click on the Execution Rules tab.
8	Configure the parameters and click on the Apply button. The form displays with schedule information. Note: The Schedule Optimization button does not appear during LSP path optimization policy creation. The LSP path optimization policy must be created first before a schedule can be applied. You must click on the Apply button. After a schedule is applied to a LSP Optimization Policy, you cannot make changes to the schedule from the Optimization Scheduled Task form.
9	Click on the Schedule Optimization button. An Optimization Scheduled Task (Create) form opens.
10	Configure the parameters.
11	Click on the Select button beside the ID parameter. A Select Schedule - Optimization Scheduled Task form opens.
12	Perform one of the following: Choose an existing schedule. Click Create to create a schedule. The NFM-P Schedule (Create) form opens. See To configure an NFM-P-based schedule for information on creating a schedule.
13	Click on the OK button. The Optimization Scheduled Task form displays schedule and optimization information.
14	Click on the OK button. The Select Schedule - Optimization Scheduled Task form closes and the LSP Path Optimization Policy form reappears.
15	Click on the Execution Candidates tab.
16	Click on the Search button to display only the eligible LSP Paths that were filtered in Step 5 and Step 6 . If a filter was not applied, all eligible LSP Paths are listed.
17	Click on the Optimize button. To view the results of optimization, see To view LSP Path optimization policy results .
18	Close the form. End of steps