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Cisco Bug: CSCuo11754 - SFF8472 takes excessive CPU

Last Modified

Feb 12, 2018

Products (17)

  • Cisco ME 3600X Series Ethernet Access Switches
  • Cisco ASR 901-6CZ-F-D Router
  • Cisco ME 3600X-24TS-M Switch
  • Cisco ASR 901-4C-FT-D Router
  • Cisco ASR 901-6CZ-F-A Router
  • Cisco ASR 901-6CZ-FT-A Router
  • Cisco ASR 901-12C-FT-D Router
  • Cisco 7600 Series Route Switch Processor 720 with 10 Gigabit Ethernet Uplinks
  • Cisco ASR 901-4C-F-D Router
  • Cisco 7600 Series Route Switch Processor 720 with Multilayer Switch Feature Card
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Known Affected Releases

15.3(3)S2

Description (partial)

Symptom:
With interface monitoring enabled small CPU spikes are observed or sub-second control plane protocol flaps are observed. More specifically control plane protocols like RSVP or OSPF that are configured with dead  times of less than 1 second experience neighbor flaps without clear CPU spikes according to "show process cpu"

Conditions:
Interface transceiver monitoring is enabled. This can be seen in the configuration with the commands

transceiver type all
 monitoring
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
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