Configuring a Loose Route

The default setting for the tunnel is to route it dynamically. Note that for Cisco tunnels, the path should be configured with loose routes to the ABR. To change the paths to configured loose routes, open the LSP Tunnel window in Modify mode from Modify > Elements > Tunnels. Click Modify and then select “All Entries” and change the Path Config. Options to “Add” “Config” to configure the route.

Notice that a loose route is now given in the Configured column, indicated by **.

Figure 1: Configured Loose Routes Network management table displaying node IDs, route types, priorities, and current vs configured routing paths between nodes.

Network management table displaying node IDs, route types, priorities, and current vs configured routing paths between nodes.

A route can also be manually configured. For example, select a tunnel and click Modify and then select “Selected Entries.” In the bottom half of the window, there is a table with the route for the tunnel. To configure the path, double-click the cell underneath the column “Configured Route”. Here you can enter in the path, using ** to indicate a loose route after the area border routers.

Note:

The Exclude-IP-Address feature is not currently supported for inter-area tunnels.

Figure 2: Configuring a Route for a Specific LSP Tunnel Screenshot of a network tunnel configuration table showing path details with columns for Pathname, Opt, and Configured Route, plus Add Row and Delete Row buttons for modification.

Screenshot of a network tunnel configuration table showing path details with columns for Pathname, Opt, and Configured Route, plus Add Row and Delete Row buttons for modification.

After configuring the routes as indicated in the previous step, LSP configlets can be generated for the newly created LSP tunnels. This is accomplished through Design > Confligets/Delta > LSP Configlet. For more information, see LSP Configlet Generation Overview.

Figure 3: Example of an LSP Configlet MPLS Traffic Engineering config snippet for a router, detailing Tunnel11001 from SFO to NYC, with explicit path and bandwidth allocation.

MPLS Traffic Engineering config snippet for a router, detailing Tunnel11001 from SFO to NYC, with explicit path and bandwidth allocation.