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Cisco Bug: CSCta15706 - RLS5-oc12ATM: Scrambling can't be disabled on ATM SPA

Last Modified

Feb 15, 2018

Products (1)

  • Cisco IOS

Known Affected Releases

12.2(33)XNE 12.2(33.1.21)MCP5 12.2(33.1.4)MCP5 12.2(33.1.6)REI 12.2(33.1.9)REI 12.2MCP5 12.2REI

Description (partial)

None

Symptom:
Topology :
   7600(SRE Throttle which does not have this fix) ------- 7600 (SRC / SRD) 

   Ping failure will happen if cell payload scrambling is turned off on the SRC /SRD image side .

Conditions:
   
   Turn off cell payload scrambling through CLI on SRE Throttle image side (which does not have 
   this fix) will not have any impact i.e. cell payload scrambling will be always turned on  
   on this image. No matter if it is disabled or enabled through the CLI.

   In SRC / SRD image cell payload scrambling can be turned off or turned on through CLI . 
   Hence if on the src/ srd image side cell payload scrambling is explicitly turned off then 
   there will be a mismatch in scrambling configuration on both sides leading to a data path 
   failure  i.e. ping failure .
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