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Known Behavior


The following behaviors are known to occur in NorthStar Controller Release 4.2.2:

  • Only the bandwidth of PCE-initiated and PCC-delegated LSPs can be sized by applying bandwidth sizing attributes, but there is nothing to prevent you from applying attributes to PCC-controlled LSPs and no warning that they will not take effect.

  • NorthStar REST API does not always return the selected routing method in the REST response:

    • Currently, if a REST API body has routingMethod=Default, the corresponding REST response does not include the routingMethod keyword.

    • NorthStar still computes the ERO properly.

    • In a future NorthStar release, the REST response will properly indicate the selected routingMethod.

  • Re-provision LSPs issue:

    • For a NETCONF-provisioned P2MP tree, re-provisioning individual sub-LSPs to go around a failed link can fail under the following conditions:

      • The user re-provisions sub-LSPs separately.

      • The user has a mixture of sub-LSPs with a user-specified strict path and paths computed by NorthStar.

    • The workflow is to re-provision all sub-LSPs of a tree together; NorthStar computes sub-LSPs of a tree as a whole, not individually.

  • Behaviors and limitations related to NETCONF Provisioning of LSPs and Binding SID Support:

    • Binding SID SR support requires Junos OS Releases 18.3R2 /18.4R2 or later.

    • Automatic rerouting of NETCONF-provisioned LSPs (including NETCONF-provisioned SR LSPs) due to a failure in the network is not supported.

    • The Preview Path button in the Provision LSP window may return a “Cannot find a path!” error message when in fact a path was found and the SR LSP was successfully provisioned. The error message occurs for certain scenarios such as when an SR LSP makes use of a binding SID SR LSP (privateForwardingAdjacency).

  • During PCE-initiated LSP provisioning, some third party routers can return an error code for an unknown reason. Currently, the NorthStar Application only reports “NS_ERR_GENERIC” when this occurs. It is planned to improve this behavior and report the exact error code (e.g. PCEP Error Type = 24 error value = 2 ) in future releases.

  • Behaviors related to Netflow Collector:

    • It can happen that during a NorthStar upgrade from NorthStar 4.x, netflowd cannot be started. If netflowd fails to start, run the following command on the system hosting the netflow collector:

    • The telemetry REST API assumes that LSPs on different routers have different names.

    • In rare cases, you might get an empty result in the network information table Service tab for both summary and detailed information, for example, after a system upgrade. If this happens, you can resolve it by restarting the web process: