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Cisco Bug: CSCul32842 - ASA 5550 8.4.7 cpu-hog in Dispatch Unit cause interface overrruns

Last Modified

Mar 06, 2018

Products (1)

  • Cisco ASA 5500-X Series Firewalls

Known Affected Releases

8.4(7)

Description (partial)

Symptom:
ASA 5550 running 8.4.7 may see large number of cpu-hog in Dispatch Unit that can cause interface overruns.

Conditions:
Replaying captures will cause cpu-hogs:

Process:      Dispatch Unit, PROC_PC_TOTAL: 1, MAXHOG: 1, LASTHOG: 1
LASTHOG At:   08:36:53 CST Nov 6 2013
PC:           0x081eab72 (suspend)

Process:      Dispatch Unit, NUMHOG: 1, MAXHOG: 1, LASTHOG: 1
LASTHOG At:   08:36:53 CST Nov 6 2013
PC:           0x081eab72 (suspend)
Call stack:   0x081eab72  0x08068e0c

Process:      Dispatch Unit, PROC_PC_TOTAL: 9, MAXHOG: 1, LASTHOG: 1
LASTHOG At:   08:39:45 CST Nov 6 2013
PC:           0x081ea9d1 (suspend)

Process:      Dispatch Unit, NUMHOG: 9, MAXHOG: 1, LASTHOG: 1
LASTHOG At:   08:39:45 CST Nov 6 2013
PC:           0x081ea9d1 (suspend)
Call stack:   0x081ea9d1  0x08068e0c

Process:      Lic TMR, PROC_PC_TOTAL: 1, MAXHOG: 1, LASTHOG: 1
LASTHOG At:   12:00:02 CST Nov 7 2013
PC:           0x0841401e (suspend)

Process:      Lic TMR, NUMHOG: 1, MAXHOG: 1, LASTHOG: 1
LASTHOG At:   12:00:02 CST Nov 7 2013
PC:           0x0841401e (suspend)
Call stack:   0x085373ed  0x08758b29  0x08753ecf  0x08068e0c

These CPU Hogs can cause interface overruns in a production environment
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