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Cisco Bug: CSCtb34234 - %ATTN-3-SYNC_TIMEOUT during periods of oversubscription with MLPPP

Last Modified

Mar 02, 2018

Products (1)

  • Cisco ASR 1000 Series Aggregation Services Routers

Known Affected Releases


Description (partial)


During periods of high traffic rates to MLPPP bundles with a QoS policy applied
%ATTN-3-SYNC-TIMEOUT warnings have been observed.

For this particular situation with MLPPP, the %ATTN-3-SYNC-TIMEOUT is
purely a cosmetic issue.

This issue has typically been seen when a given QoS class is being 
oversubscribed or when a deep queue-limit has been assigned to a QoS 
class queue and again the class is oversubscribed.

Related Community Discussions

ASR1002 HX IOSXE 4 PLATFORM R0 0 kernel astro cilk enable rx read timed out
Hello, Have you already seen the message bellow ? Version 16.6.3 Device running crypto    %IOSXE-4-PLATFORM:  R0/0: kernel: astro: cilk enable rx: read timed out 2000us *Aug 22 08:40:31.869 UTC: %IOSXE-3-PLATFORM:  SIP0: cpp_cp: QFP:0.0 Thread:182 TS:00000083006528243692 %ATTN-3-SYNC_TIMEOUT: msecs since last timeout 82981688, missing packets 2829 *Aug 22 08:40:32.119 UTC: %IOSXE-4-PLATFORM:  R0/0: kernel: astro: cilk enable rx: read timed out 2000us *Aug 22 08:40:33.120 UTC: %IOSXE-4-PLATFORM:  ...
Latest activity: Aug 22, 2018
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  • Full Description (including symptoms, conditions and workarounds)
  • Status
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  • Related Community Discussions
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