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Cisco Bug: CSCtb04121 - after process restart controller is down with no alarm

Last Modified

May 16, 2018

Products (1)

  • Cisco Carrier Routing System

Known Affected Releases


Description (partial)


POS Interfaces down/down. 

show controller sonet R/S/B/P reports:
Status: Down
Detected Alarms: None
Asserted Alarms: None
Mask for Detected->Asserted: None

ie. showing no alarms but the controller is Down, hence interfaces taken out of service.

show im database detail R/S/CPU0 reports:
Controller SONET R/S/B/P, ifh 0x03008600 (down, 10000)
Controller SonetPath R/S/B/P, ifh 0x03008700 (down, 10000)
Interface POS R/S/B/P, ifh 0x03008800 (down, 4474+4)


Process restart of g_spa_x or plim_16p_oc48 can cause this condition.

A known trigger is CSCsy21122 which causes g_spa_x crash and restart from OIR activity.

It is not possible to bring the affected interface(s) back up from configuration or process restarts.
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