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Cisco Bug: CSCun37916 - Reconfigure downstream channel under MD, modems can't be wb online.

Last Modified

Nov 08, 2015

Products (1)

  • Cisco uBR10000 Series Universal Broadband Routers

Known Affected Releases

12.2SCH

Description (partial)

Symptom:
1. modems wb online, there are many rcc under c8/0/0
dt-10k-i08#show cable mac-domain c8/0/0 rcc
RCC-ID   RCP                 RCs MD-DS-SG CMs   WB/RCC-TMPL
21       00 00 00 00 00      4   0        2     WB (Wi3/3/1:31)
22       00 00 00 00 00      4   0        2     WB (Wi3/3/2:0)
23       00 00 00 00 00      8   0        0     WB (Wi3/3/3:0)
24       00 00 00 00 00      4   0        0     WB (Wi3/3/3:1)
25       00 00 00 00 00      4   0        1     WB (Wi3/3/3:31)
26       00 00 00 00 00      4   0        1     WB (Wi3/3/4:0)
27       00 00 00 00 00      8   0        0     WB (Wi3/3/5:0)
28       00 00 00 00 00      4   0        0     WB (Wi3/3/5:1)
29       00 00 00 00 00      4   0        0     WB (Wi3/3/5:24)
30       00 00 00 00 00      4   0        0     WB (Wi3/3/5:31)
2. delete all of downstream channels under c8/0/0. 
3. do LC HA and revertback to c8/0/0
4. reconfigure all of downstream channels back to c8/0/0
5. modems can't be  wb online, there is no rcc for c8/0/0
dt-10k-i08#show cable mac-domain  c8/0/0 rcc
RCC-ID   RCP                 RCs MD-DS-SG CMs   WB/RCC-TMPL
6. reload CMTS, it recovered, and the issue could be reproduced after several times trying.

Conditions:
when LC revertback
add  downstream channels under interface in a short time(less than 4 seconds)
this issue will happen
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