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Cisco Bug: CSCuj58272 - BQS RM proc reparent crash during PPP eth session bring up in 1002x

Last Modified

Feb 10, 2017

Products (1)

  • Cisco ASR 1000 Series Aggregation Services Routers

Known Affected Releases

15.2(4)S 15.3(3)S 15.4(1)S

Description (partial)

Symptom:
The CP process crashes when reparenting more than 128 entries from one tree to the other. A reparenting event could be stimulated by either an internal or external event but this issue is more likely to caused by an internal reparenting.

An internal reparenting could occur when a leaf node is transformed into a hierarchy layer node or when de-aggregating an aggregation node after the schedule size is below the 4000 threshold.

Conditions:
When reparenting either a leaf or hierarchy layer entries, the resource manager was not clearing the counter that tracks the number of entries that need to be flushed after processing the first batch. This caused the code to run incorrectly to a point of completing the request prior to reprogramming the HW correctly. As a result some entries may be left in the source parent which cause a crash when the tree is freed before it is empty.
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