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Cisco Bug: CSCvi12141 - Unicast traffic fails with extended MAC Access-list

Last Modified

Nov 27, 2019

Products (147)

  • Cisco Catalyst 3850 Series Switches
  • Cisco Catalyst 3650-48TQ-L Switch
  • Cisco Catalyst 9300-48P-A Switch
  • Cisco Catalyst 3650-12X48UR-L Switch
  • Cisco Catalyst 3650-48FS-S Switch
  • Cisco Catalyst 3650-24PD-E Switch
  • Cisco Catalyst C9500-16X-E Switch
  • Cisco Catalyst C9500-32QC-E Switch
  • Cisco Catalyst 3650-48FQ-E Switch
  • Cisco Catalyst 3850-16XS-S Switch
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Known Affected Releases

16.9.1 Fuji-16.8.1 Fuji-16.9.1

Description (partial)

Symptom:
During bootup, sometimes we see that STP state in HW is configured as blocking even though software shows it as forwarding because of which packets get dropped with STP_BLK_FWD exception in HW.

Conditions:
The problem is more likely to occur if the vlans and number of VPs are high in number.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
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  • Known Fixed Releases
  • Related Community Discussions
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