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Cisco Bug: CSCsz69486 - CoPP: Multicast traffics are punted to Control plane

Last Modified

Jan 29, 2017

Products (1)

  • Cisco IOS

Known Affected Releases


Description (partial)

Symptoms: A multicast video stream forwarded between GE0/0 subinterfaces is
policed by the Control Plane Policing (CoPP) class-default. As soon as CoPP is
removed, the video recovers its original quality.

With CEF:
qffsydbd6ar01#deb control-pl
qffsydbd6ar01#sh log | i reason
 Control Plane: marking pak exception [cef reason 12]
 Control Plane: marking pak exception [cef reason 39]

Without CEF:
qffsydbd6ar01(config)#no ip cef
qffsydbd6ar01#deb control-pl
qffsydbd6ar01#sh log 
Control Plane:marking in pak exception [non cef linktype IP]

Conditions: This occurs after upgrading to Cisco IOS Release 12.4(20)T2.
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