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Cisco Bug: CSCte20216 - Always check QAM state when MDD recovery to deal with misbehaving CM

Last Modified

Jul 23, 2010

Products (1)

  • Cisco uBR7200 Series Universal Broadband Routers

Known Affected Releases

12.2SBC

Description (partial)

Symptom:
Some cable modems, such as the DPC2505 cable modem report QAM/FEC lock failure (event type 2) when a secondary RF-channel is down, and report an MDD recovery (event type 4) when the RF-channel is UP, instead of reporting a QAM/FEC recovery. 

This causes QAM/MDD state transition error in the Cisco CMTS. 

Conditions:
 This issue is seen when a DPC2505 is connected to the Cisco CMTS.
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