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Cisco Bug: CSCup32608 - Link State Tracking Fails on IBM CBS Blade Switches - 15.0(2)SE6

Last Modified

Nov 27, 2020

Products (169)

  • Cisco LAN Switch Software
  • Cisco Catalyst 3560X-48P-S Switch
  • Cisco Catalyst 3560X-48U-S Switch
  • Cisco Catalyst 3560E-24TD-S Switch
  • Cisco Catalyst 3560X-48T-E Switch
  • Cisco Catalyst 2960-24-S Switch
  • Cisco Catalyst 3560CG-8TC-S Compact Switch
  • Cisco Catalyst 3560G-48PS Switch
  • Cisco Catalyst 3750V2-24FS Switch
  • Cisco Catalyst 2960-24TC-L Switch
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Known Affected Releases

12.2(50.9) 15.0(2)SE6

Description (partial)

Symptom:The Link state tracking feature on Catalyst Blade switches for the IBM Bladecenter chassis fails with build 15.0(2)SE6 due to link status flap in downstream interface.
Conditions:After upgrading to SE6, the "Downstream" interfaces in link state tracking will flap repeatedly, even though the "Upstream" interface remains stable. 
Disabling link state tracking globally or shutting down the uplink interface will stop the flaps.
Removing link state tracking from the interfaces will also stop the flaps.
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