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Cisco Bug: CSCvi66788 - VPC-DI incorrectly reports Standby SF when N+1 count is less

Last Modified

Aug 29, 2018

Products (2)

  • Cisco ASR 5000 Series
  • Cisco ASR 5500

Known Affected Releases

21.3.12.68820 21.8.0 21.8.ca1

Description (partial)

Symptom:
Observed on Instance CGWY21 that even with N+1 count not ok (lesser SF amount than 17 this system is still reporting the use and availability of a Standby SF in the system.

In customer testing, StarOS reports:

[local]ZRDM5BCGWY21# show rct stats 
Friday March 16 14:31:03 PDT 2018

RCT stats details (Last 2 Actions)

 #  Action        Type      From  To  Start Time                Duration     Status  
--- ------------- --------- ---- ---- ------------------------  -----------  ------- 
 1  Shutdown      N/A        13    0  2018-Mar-16+14:21:40.252    0.007 sec  Success  
 2  Shutdown      N/A        10    0  2018-Mar-16+14:29:48.300    0.007 sec  Success  

RCT stats summary
-----------------
Migrations        =   0
  Management Card =   0
  Packet Card     =   0
Switchovers       =   0
[local]ZRDM5BCGWY21#
[local]ZRDM5BCGWY21# show card table 
Friday March 16 14:31:32 PDT 2018
Slot         Card Type                               Oper State     SPOF  Attach
-----------  --------------------------------------  -------------  ----  ------
 1: CFC      Control Function Virtual Card           Active         Yes         
 3: FC       6-Port Service Function Virtual Card    Active         No          
 4: FC       6-Port Service Function Virtual Card    Active         No          
 5: FC       6-Port Service Function Virtual Card    Active         No          
 6: FC       6-Port Service Function Virtual Card    Active         No          
 7: FC       6-Port Service Function Virtual Card    Active         No          
 8: FC       6-Port Service Function Virtual Card    Active         No          
 9: FC       6-Port Service Function Virtual Card    Active         No          
10: FC       6-Port Service Function Virtual Card    Standby        -           
12: FC       6-Port Service Function Virtual Card    Active         No          
13: FC       6-Port Service Function Virtual Card    Active         No          
14: FC       6-Port Service Function Virtual Card    Active         No          
15: FC       6-Port Service Function Virtual Card    Active         No          
16: FC       6-Port Service Function Virtual Card    Active         No          
17: FC       6-Port Service Function Virtual Card    Active         No          
19: FC       6-Port Service Function Virtual Card    Active         No          
[local]ZRDM5BCGWY21#

Conditions:
Instance CGWY21 shows incorrectly a Standby SF when the count of SF is less than configured amount.
Instance expects 17 SF's, where 15 are Active, 1 Demux and 1 as Standby.

StarOS is reporting that even with lesser SF amount than 17, an Standby SF in shown in the system. 
In customer testing, StarOS reports:

[local]ZRDM5BCGWY21# show card table 
Friday March 16 14:31:32 PDT 2018
Slot         Card Type                               Oper State     SPOF  Attach
-----------  --------------------------------------  -------------  ----  ------
 1: CFC      Control Function Virtual Card           Active         Yes         
 3: FC       6-Port Service Function Virtual Card    Active         No          
 4: FC       6-Port Service Function Virtual Card    Active         No          
 5: FC       6-Port Service Function Virtual Card    Active         No          
 6: FC       6-Port Service Function Virtual Card    Active         No          
 7: FC       6-Port Service Function Virtual Card    Active         No          
 8: FC       6-Port Service Function Virtual Card    Active         No          
 9: FC       6-Port Service Function Virtual Card    Active         No          
10: FC       6-Port Service Function Virtual Card    Standby        -           
12: FC       6-Port Service Function Virtual Card    Active         No          
13: FC       6-Port Service Function Virtual Card    Active         No          
14: FC       6-Port Service Function Virtual Card    Active         No          
15: FC       6-Port Service Function Virtual Card    Active         No          
16: FC       6-Port Service Function Virtual Card    Active         No          
17: FC       6-Port Service Function Virtual Card    Active         No          
19: FC       6-Port Service Function Virtual Card    Active         No          
[local]ZRDM5BCGWY21# 

From above, cards 11 and 18 are not avasilable in the system, so reporting a Standby card is wrong. There should be SPOF active on all cards.
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