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Cisco Bug: CSCuq79559 - IPv6 mld traffic causes high CPU utilization on 2960S

Last Modified

Nov 19, 2019

Products (175)

  • Cisco Catalyst 2960-S Series Switches
  • Cisco Catalyst 3560E-48PD-SF Switch
  • Cisco Catalyst 3750V2-24FS Switch
  • Cisco Catalyst 3560CG-8TC-S Compact Switch
  • Cisco Catalyst 3560G-48PS Switch
  • Cisco Catalyst 3560E-24TD-S Switch
  • Cisco Catalyst 2960C-8TC-S Switch
  • Cisco Catalyst 3560E-48PD-E Switch
  • Cisco Catalyst 3560X-48U-S Switch
  • Cisco Catalyst 3560X-48T-E Switch
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Known Affected Releases

15.0(2)SE5

Description (partial) 

Symptom:
IPv6 mld traffic will be punted to the CPU to be processed, which can cause increased interrupt-based CPU utilization

Conditions:
IPv6 mld traffic from hosts or switches connected to a Cat2k/3k switches. End hosts send a huge rate of mld control packets due to issues in the hosts' NIC drivers.
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Bug Details Include

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  • Status
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