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Provision Diverse LSP

 

When creating a route between two sites, you might not want to rely on a single LSP to send traffic from one site to another. By creating a second LSP routing path between the two sites, you can protect against failures and balance the network load.

To provision a diverse pair of tunnels in the network topology, navigate to Applications>Provision Diverse LSP. The Provision Diverse LSP window is displayed as shown in Figure 1.

Figure 1: Provision Diverse LSP Window, Properties Tab
Provision Diverse
LSP Window, Properties Tab

On the Properties tab, the data entry fields are the same as for adding a single tunnel, with the addition of an indication as to whether the tunnels are link, site, or SRLG diverse from each other and a check box to create a symmetric pair. The Create Symmetric Pair option allows you to create the symmetric pair in the same operation as creating the diverse LSP.

By default, the tunnel creation is not scheduled, which means the tunnels are provisioned immediately upon submission. Click the Scheduling tab to access scheduling options. Select Once to enable the scheduler options for a single event. Select Daily to enable the scheduler options for a recurring daily event. Click the calendar icon beside the fields to select the start and end dates, and the beginning and ending times.

Click Preview Paths at the bottom of the window to see the paths drawn on the topology map. Click Submit to complete the diverse LSP provisioning.

A few things to keep in mind with regard to provisioning diverse LSPs:

  • The time zone is the server time zone.

  • If NorthStar Controller is not able to achieve the diversity level you request, it still creates the diverse tunnel pair, using a diversity level as close as possible to the level you requested.

  • NorthStar Controller does not, by default, reroute a diverse LSP pair when there is a network outage. Instead, use the Path Optimization feature (Applications > Path Optimization). One option is to schedule path optimization to occur at regular intervals.

  • When provisioning diverse LSPs, NorthStar might return an error if the value you entered in the Modify Node window’s Site field contains special characters, depending on the version of Node.js in use. We recommend using alphanumeric characters only. See Network Information Table Bottom Tool Bar for the location of the Site field in the Modify Node window.