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Schedule and Monitor a Maintenance Event

Paragon Pathfinder allows you to schedule maintenance events on nodes, links, and facilities (shared risk link groups [SRLGs]). During a maintenance event, Paragon Pathfinder considers the entities (nodes, links, and facilities) that are undergoing maintenance as down and routes the LSPs traversing through those entities through other paths, thereby ensuring that there is no downtime because of the maintenance.

The maintenance event that you add is listed under the Maintenance tab, where you can view the progress of the maintenance event from its status; see About the Maintenance Tab.

To schedule and to monitor a maintenance event:

  1. On the Paragon Automation GUI, navigate to the Topology page (Network > Maintenance).
  2. Schedule a maintenance event from the Maintenance tab of the Network Information table on the Topology page; see Add a Maintenance Event.
    After you schedule the maintenance event, the maintenance event is listed in the Maintenance tab of the Network Information table; see Maintenance Event Overview
  3. Identify the LSPs that are affected by the maintenance event by using the Controller Status of the LSPs in the Tunnels tab of the Network Information table. Table 1 lists the Controller Status values for LSPs affected by a maintenance event.

  4. After the maintenance event is complete, ensure that the LSPs that were previously affected by the maintenance event are up and working fine:
    Note:

    After the maintenance event is completed, the Reoptimize Tunnels upon Completion setting, which you configure while scheduling a maintenance event, determines whether Paragon Pathfinder recalculates the most optimum path or not. For more information, see Add a Maintenance Event.
    1. On the Tunnels tab of the Network Information Table, ensure that the Controller Status field for each LSP, previously affected by the maintenance event is empty.
    2. Select the LSPs in the Network Information Table to view the routes taken by the LSPs (on the network topology map).
    3. (Optional) Use the Diagnostic tool present on the top-right side of the Network Information Table to:

      • Check the details of the LSP, as configured on the router at the head-end of the LSP to confirm that the LSP is configured correctly.

      • Send ping traffic over the LSP to check whether Node A is able to reach Node Z.

      • Send traceroute traffic over the LSP to check the intermediate nodes between Node A and Node Z and if any forwarding issues are present in the LSP.

    4. For each LSP that was previously affected, select the LSP and click View > Tunnel Traffic to ensure that traffic is flowing smoothly through the LSP, and click View > Delay to ensure that delay is within the acceptable limits.

    You have now completed all the tasks that are related to the maintenance event.

Table 1: Controller Status for LSPs under Maintenance
Controller Status Field Description
Maint_Reroute

The LSP is rerouted due to maintenance.
Maint_NotHandled

The LSP is not a part of the ongoing maintenance event because the LSP is not controlled by Paragon Pathfinder.
Maint_NotReroute_DivPathUp

The LSP is not rerouted due to the maintenance event because a standby path is already up and functioning.
Maint_NotReroute_NodeDown

The LSP is not rerouted because the maintenance event is affecting the endpoints of the LSP.

Related Documentation