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Create P2MP LSP Tunnels and Generate Corresponding LSP Configlets

NorthStar Planner allows the user to create P2MP LSP tunnels. To create P2MP LSP tunnels, navigate to the Tunnels tab to bring up the Tunnels Window. Then click on the Add button, and select the P2MP Tunnels option to bring up the Add P2MP Tunnels window.

Figure 1: Selecting the P2MP Tunnels Option in the Tunnels WindowDropdown menu titled Add with options: One Tunnel, Multiple Tunnels, P2MP Tunnels highlighted, One Hop Tunnels.
Figure 2: Adding a P2MP LSP tunnelScreenshot of a network configuration interface for adding Point-to-Multipoint tunnels, showing fields for template, tunnel name, count, bandwidth, type, inclusion criteria, priority, service, path options, comments, source, destination, filter options, bidirectional creation, and action buttons for adding and closing tunnels.

As shown in the above figure, first specify a name for the P2MP LSP instance and then choose the source node (ingress LSR) and the leaf nodes (egress LSRs for the sub-LSPs) for the P2MP tree. Then click on the Add button, and the tool will automatically perform the P2MP LSP path computations necessary to place the sub-LSPs associated with the P2MP LSP.

The user has the option to further specify traffic engineering constraints (such as bandwidth and explicit path) for each sub-LSP, as can be done with any point-to-point LSP. For further information on how to specify tunnel parameters. For more information, see NorthStar Planner LSP Tunnels Overview.

To see the newly-created P2MP LSP, bring up the NetInfo > Multicast > Multicast Trees window to see the P2MP LSP tunnels configured in the network.

Figure 3: Newly-Added P2MP LSP Called espntvTable displaying multicast trees with columns: Name, Src Node, BW, Number of Dest, Number Routed, Ave Hop, Max Hop, Number Cross, and Length.
Figure 4: The Sub-LSPs for the P2MP LSP espntvTable of multicast tunnels for espntv showing ID, NodeA ID as DENVER, NodeZ ID as PALOALTO, BOSTON, MIAMI; Type R,MCespntv; Bandwidth 300.0M; HopCount 2, 6, 3.

After using the NorthStar Planner to model P2MP LSPs, the P2MP LSPs can be rolled out according to the tool’s P2MP LSP path computation calculations. This allows the P2MP LSPs created during network planning to be translated into a series of actions that can be easily implemented by network operations. NorthStar Planner can be used to easily convert the outputs of the network modeling into LSP configlets.

A configlet is a small section of the router configuration file that describes all the LSP attributes: bandwidth, admin-group, primary path, etc. To generate the configlets, select Design > Confligets/Delta > LSP Configlet to bring up the LSP Configlet window. After the appropriate options have been specified, click on Submit button to generate the configlets for the selected nodes/tunnels.

Figure 5: LSP Configlet Generation WindowLSP Configlet interface with fields for target directory, options, file format, node/tunnel selection, and vendor tabs. Buttons: Submit, View/Edit, Close, Help.

The following figure shows the various statements listed in the configlet generated by NorthStar Planner for the P2MP LSP (espntv) that was created above.

Figure 6: Configlet Generated for the P2MP LSP espntv.MPLS configuration file in text editor showing label-switched paths from DENVER to BOSTON, MIAMI, PALOALTO with bandwidth 300m and priority 7 7.