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Cisco Bug: CSCul14719 - DCD and MDD msgs are still matched when mac-address is configured to CM

Last Modified

Feb 03, 2017

Products (1)

  • Cisco uBR10000 Series Universal Broadband Routers

Known Affected Releases

15.3(3)S

Description (partial)

Symptom:
DCD and MDD msgs are still matched when cable monitor mac-address is configured to CM's.  Reproduce steps are as follows:

dt-10k-i3#show version | inc image
System image file is "disk0:ubr10k5-k9p6u2-mz.mcp.1026"

Reproduce Probability: stably reproduce.

1. Configure DSG on CMTS.
2. Verify DSD message is sending correctly.
3. Select 2 CMs (1 CM per primary channel under MD Cable7/1/0) and configure cable monitor for one of MD interface (Mo7/1/0:0) on the MD.
4. Connect monitor port Te0/0/0 to a IXIA port. The captured packets on IXIA port shows there are 2 DCD and MDD messages received every time (see attached cap file for details).

Actually, DCD and MDD msgs should not be matched and captured because cable monitor mac-address is configured to CM's, but not the destination mac-address of DCD or MDD messages in this case.

Also refer to attached test log for details.

Conditions:
configure MAC address based downstream cable monitor to a MD.
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