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Cisco Bug: CSCvs79437 - ACE with 'tcp-option-length 0' can have an incorrect vlan tag

Last Modified

May 08, 2020

Products (67)

  • Cisco Nexus 9000 Series Switches
  • Cisco Nexus 3548 Switch
  • Cisco Nexus 3636C-R Switch
  • Cisco Nexus 3548-X Switch
  • Cisco Nexus 93600CD-GX Switch
  • Cisco Nexus 9516 Switch
  • Cisco Nexus 92348GC-X Switch
  • Cisco Nexus 3548-XL Switch
  • Cisco Nexus 9396PX Switch
  • Cisco Nexus 92304QC Switch
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Known Affected Releases

9.3(1) 9.3(3)

Description (partial)

When an access-list entry with 'tcp-option-length 0' is used, and if this entry is filtering a specific vlan id, the internal ACE may not have the correct vlan id. 
This would lead to traffic not being correctly matched against the access-list.

Nexus 9000 running NXOS 9.3(3) or previous release.
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