Preview Tool

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
View all products in Bug Search Tool Login Required

Known Affected Releases

16.9.1 Fuji-16.8.1 Fuji-16.9.1

Description (partial)

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.

The problem is more likely to occur if the vlans and number of VPs are high in number.
Bug details contain sensitive information and therefore require a account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.