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Cisco Bug: CSCus14747 - ASR903- CPU generated L2/L3 packets not sent via proper queues on egress

Last Modified

Feb 14, 2018

Products (21)

  • Cisco IOS
  • Cisco ASR 901-6CZ-F-D Router
  • Cisco ASR 901-6CZ-FS-D Router
  • Cisco ASR 901S-4SG-F-D Router
  • Cisco ASR 901-4C-FT-D Router
  • Cisco ME 3600X-24TS-M Switch
  • Cisco ASR 901S-2SG-F-D Router
  • Cisco ASR 901S-2SG-F-AH Router
  • Cisco ASR 901-6CZ-F-A Router
  • Cisco ASR 901-6CZ-FT-A Router
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Known Affected Releases

15.4(2)S1

Description (partial)

Symptom:
When the 903 egress class-default queue was congested with traffic exceeding the QoS shaper bandwidth, 
DMR packet drops were observed not only for the default class (CoS 0), but also for all other non-default 
classes (CoS 3, 6, 7).

Likewise, when the egress default queue was congested, SSH response from the 903 (which SHOULD NOT be 
queued via the default queue per QoS settings) got increasingly slower as default queue congestion increased.

Conditions:
Sending L2/L3 traffic to 903 which required 903 to locally generate response packets.
903 egress QoS policy applied at main interface level. 903 ingress QoS policy applied at each service instance.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
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