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Cisco Bug: CSCuo17065 - N3K: Port QoS Policy Impacts System Queue Mapping on all Ports

Last Modified

Feb 15, 2018

Products (7)

  • Cisco Nexus 3000 Series Switches
  • Cisco Nexus 3064 Switch
  • Cisco Nexus 3016 Switch
  • Cisco Nexus 3064-T Switch
  • Cisco Nexus 3048 Switch
  • Cisco Nexus 3132Q Switch
  • Cisco Nexus 3172 Switch

Known Affected Releases

6.0(2)U2(2) 6.0(2)U2(4.91.4Z) 6.0(2)U3(1)

Description (partial)

Packets may get mapped to the "wrong" output interface queue when applying an input interface QoS policy (I.E. Marking) that overrides a configured System QoS Policy.  It should be noted that the input interface QoS policy can be applied to "any" interface, which will impact traffic on non-related interfaces.

This only occurs if a system QoS input policy is configured and a different interface QoS policy is applied to an interface after the system QoS policy is already applied.

System Qos Policy:

system qos
    service-policy type qos input QOS_MARKING

Uplink Port(s):

        interface EthernetX/X 
          service-policy type qos input UPLINK_REMARKING
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