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Cisco Bug: CSCut24586 - TBK observed in IP SLA as %SYS-2-NOBLOCK: idle with blocking disabled

Last Modified

Jan 30, 2017

Products (16)

  • Cisco IOS
  • Cisco ASR 901-6CZ-F-D Router
  • Cisco ASR 901-6CZ-FS-D Router
  • Cisco ASR 901S-4SG-F-D Router
  • Cisco ASR 901-4C-FT-D Router
  • Cisco ASR 901-6CZ-F-A Router
  • Cisco ASR 901S-2SG-F-D Router
  • Cisco ASR 901S-2SG-F-AH Router
  • Cisco ASR 901-6CZ-FT-A Router
  • Cisco ASR 901-12C-FT-D Router
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Known Affected Releases

15.5(2)S

Description (partial)

Symptom:
Traceback observed in IP SLA as %SYS-2-NOBLOCK: idle with blocking disabled. -Process= "IP SLAs Responder"

Conditions:
1.	Load the attached configuration file which has scaled configurations. (medium scaled config) 
2.	Observe that the protocols are in settled state
3.	Pump the traffic in G8032,REP rings, IP SLA & some of the L2 VPNs (X-connects)
4.	Mac scaling is around 1500 entries
5.	Observe the protocols are in settled state.
6.	Perform flapping on all the interfaces using ?range? command.
7.	Perform un flapping on all the interfaces using ?range command? 
8.	Observe the trace back as sited above
 
Traceback summary
===============
% 0x10e9dff4 : verrmsg_generic
% 0x10e9e3a4 : errmsg
% 0x14b547b8 : process_ok_to_reschedule
% 0x12b546f0 : process_wait_for_event
% 0x12cdb0c0 : xos_dm_wait
% 0x127e16fc : sla_start_responder
% 0x127dcf2c : sla_IOS_responder
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