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Failure Simulation Options

 

To set failure simulation options, in the Juniper NorthStar Planner window, select Simulation > Simulation Options. The Juniper NorthStar Simulation Options window is displayed with Failure Simulation selected as shown in Figure 1.

Figure 1: Juniper NorthStar Simulation Options Window with Failure Simulation Selected
Juniper NorthStar Simulation
Options Window with Failure Simulation Selected

Table 1 describes the options available in the Juniper NorthStar Controller Simulation Options window with Failure Simulation selected.

Table 1: Failure Simulation Options

Option

Description

Include Not-CanFail Trunks in Link Failures

This option specifies whether links configured as CanFail = 0 should be included in link failure simulations. A link configured as CanFail = 0 represents a link that never fails. A link configured as CanFail = 1 represents a link that can fail.

Exclude Currently Unplaced Demands

This option specifies whether unplaced tunnels should be included in the failure simulation. Note that unless specified in this option, unplaced tunnels are listed along with failed tunnels in the node, link, and single line failure simulations.

Include AS Node/Link

If set to Yes, AS nodes and AS links are failed in the exhaustive node and link simulations, respectively. To exclude the AS nodes and AS links from the exhaustive simulations, set this option to No.

Drop all Demands/Tunnels with Priority lower than <value> when a Node Fails

During node failure simulation, tunnels that are lower than the defined value are automatically dropped and are not rerouted in the simulation results.

Drop all Demands/Tunnels with Priority lower than <value> when a Link Fails

During link failure simulation, tunnels that are lower than the defined value are automatically dropped and are not rerouted in the simulation results.

To set failure simulation options, in the Juniper NorthStar Planner window, select Simulation > Simulation Options. The Juniper NorthStar Simulation Options window is displayed with Failure Simulation selected as shown in Figure 1.

To set failure report options, select Failure Report. The Juniper NorthStar Simulation Options window is displayed with Failure Report selected as shown in Figure 2.

Figure 2: Juniper NorthStar Simulation Options Window with Failure Report Selected
Juniper NorthStar Simulation Options
Window with Failure Report Selected

Table 2 lists the options available in the Juniper NorthStar Simulation Options window with Failure Report selected.

Table 2: Failure Simulation Failure Report Options

Option

Description

Verbose Mode

Specifies whether output results should be in detailed (verbose) or summary format. When in verbose mode, the program draws colored lines representing failed and rerouted tunnels on the topology map during interactive failure simulations. When verbose mode is disabled, no such lines are drawn on the map during interactive failure simulations.

Sequential Mode

Allows you to sequentially step through a given simulation run. You can advance to the next simulation by clicking the left mouse button. If sequential mode is set to No, the simulation automatically runs to completion.

Trace File

Specifies whether a trace file should be used to record simulation output results.

Display Paths at Failed Nodes

Specifies whether paths that originate or terminate at a failed node should be displayed in the simulation output. All such tunnels are brought down in a node failure.

Exclude Path Required Tunnels in Failure Statistics

Specifies whether tunnels that failed because of path required criteria should be excluded in the simulation. If a demand is defined with a path required field and that path is not available for some reason, the demand fails. The program does not attempt to reroute the demand on an alternate path.

Report Tunnel Utilization

When running an exhaustive failure simulation in Layer 3 and selecting Generate Peak Utilization Report, the Tunnel Peak Utilization report generation can be turned off by setting this to No.