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Cisco Bug: CSCtd92385 - linecards IN-RESET state after downgrade 3.7.2

Last Modified

May 16, 2018

Products (1)

  • Cisco ASR 9000 Series Aggregation Services Routers

Known Affected Releases


Description (partial)


LCs are continuously reset and never come up.

RP/0/RSP0/CPU0:VC(admin)#sh plat
Thu Jan  7 15:14:44.825 PST PST
Node            Type                      State           Config State
0/RSP0/CPU0     A9K-RSP-4G(Active)        IOS XR RUN      PWR,NSHUT,MON
0/RSP1/CPU0     A9K-RSP-4G(Standby)       IOS XR RUN      PWR,NSHUT,MON
0/FT0/SP        FAN TRAY                  READY           
0/FT1/SP        FAN TRAY                  READY           
0/1/CPU0        A9K-4T-B                  BRINGDOWN       PWR,NSHUT,NMON
0/2/CPU0        A9K-40GE-B                BRINGDOWN       PWR,NSHUT,NMON


Due to a bug in an install package sort algorithm the admin meta-data directory of SMUs will get deleted, but will be copied back because of SDR scope sync, and the gap is around half minute. If standby RP requests package sync list from active RP within the small time window then the issue will be seen (ie, it prevents LCs to come up).
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