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Cisco Bug: CSCuk50878 - Spurious memory access in wccp_srvc_grp_find

Last Modified

Jan 31, 2017

Products (53)

  • Cisco IOS
  • Cisco Unified Workforce Optimization Advanced Quality Management 8.0(2)
  • Cisco Crosswork Optimization Engine
  • Cisco IGX 8410 Multiservice Switch
  • Cisco NetFlow Generation Appliance (NGA) 3140
  • Cisco Unified IP Interactive Voice Response (IVR) 8.5(1)
  • Cisco Unified Wireless IP Phone 7925G
  • Cisco Catalyst 6500 Series Supervisor Engine 2
  • Cisco CRS-3 Multishelf System
  • Cisco Aironet 5 GHz 54 Mbps Wireless LAN Client Adapter (CB20A)
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Known Affected Releases

1.0 12.3(6) 12.3T

Description (partial)

Symptoms: After a number of WCCP "cache lost" and "cache found" events have 
occurred on a Cisco router, spurious memory accesses may occur, and then the 
addition and deletion of WCCP services may fail. When this situation occurs, 
the output of the <CmdBold>show ip wccp<noCmdBold>
<CmdArg>service-number<noCmdArg> command does not show the WCCP service, even 
though the WCCP service does show in the output of the <CmdBold>show ip 
wccp<noCmdBold> command.

Conditions: This symptom is observed only on Cisco IOS images that contain the 
fix for CSCec55429 and only with dynamic services (not with web cache service) 
when all the caches in a service group are lost and then reacquired a number 
of times. Such a situation may occur by services being manually disabled and 
reenabled on a cache or by a heavy traffic load between the router and the 
cache, causing WCCP protocol messages to be dropped.

Once the symptom has occurred, you must stop all WCCP services on the 
router, and then restart the WCCP services.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
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  • Known Fixed Releases
  • Related Community Discussions
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