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Cisco Bug: CSCuj25418 - ASR1K: cpp_cp_svr crash@cpp_bqs_rm_yoda_unplace_and_destroy_srt_obj

Last Modified

Mar 24, 2019

Products (1)

  • Cisco ASR 1000 Series Aggregation Services Routers

Known Affected Releases

15.2(4)S 15.3(3)S 15.4(1)S 15.4(2)S

Description (partial)

Symptom:
The ESP-100 and ASR1K-2X crash when flat policies are applied on both the tunnel and the destination sub-interface. This issue is observed when QOS is applied first on the tunnel then on the sub-interface as follows:

policy-map tunnel-shaper
  class class-default
    shape aver per 20

policy-map sub-int-shaper
  class class-default
     shape ave per 90

Be sure the tunnel is active and pointing to the sub-interface with QoS applied before applying the sub-interface policy. See the attached repro-steps for details.

int tunnel1
 service-policy out tunnel-shaper

int g2/3/0.100
  service-policy out sub-int-shaper

Conditions:
When a sub-interface policy is applied after QoS is active on a tunnel, the tunnel is reparented from the current aggregation node to the sub-interface node. Since reparenting a leaf node requires adding a temporary node in the hierarchy to be able to move flow-control gracefully, the logic to detach the source leaf node from the temporary node was missing. As a result, the code generated a fatal error while attempting to free the temporary node before it is empty.
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