In an Adaptive Session Redundancy (ASR) environment, if you run traffic to a configuration that contains discrepancies between the redundant indexes on the two CSSs, the CPU utilization for each processor on the CSS may climb to an abnormal level (at 2000 flows/second, approximately 50 percent utilization for each processor).
If you set the logging level to notice-5 or higher, the SCM utilization may peak at approximately 90 percent because each connection generates a redundant index mismatch log entry. For example:
AUG 7 14:12:15 3/1 1124272 SLR-5: Rejected. Redundant global rule index (7) not found.
This might probably the reason for the High CPU utilization.
The CSS 11800 with CSS8-SCM Redundant System Control Module (SCM) is designated for end of sales.
The recommended replacements for the Cisco CSS 11800 include the Cisco CSS 11500 Series Content Services Switch or the Content Switching Module (CSM)an integrated services module for the Cisco Catalyst. 6500 Series Switch and the Cisco 7600 Internet Router.
