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Cisco Bug: CSCup03921 - N9K accepts untagged on native vlan with do1tq tag native config

Last Modified

Sep 27, 2018

Products (7)

  • Cisco Nexus 9000 Series Switches
  • Cisco Nexus 9516 Switch
  • Cisco Nexus 9396PX Switch
  • Cisco Nexus 9504 Switch
  • Cisco Nexus 3164Q Switch
  • Cisco Nexus 9508 Switch
  • Cisco Nexus 93128TX Switch

Known Affected Releases

6.1(2)I2(2a) 7.0(3)I1(1.232) 7.0(3)I2(0.354) 7.0(3)I3(0.285) 7.0(3)I5(1.23) 7.0(3)I7(0.296)

Description (partial)

RNE description added

The N9K accepts untagged packets with a dot1Q tag configuration. If the other end is not configured with a dot1Q configuration, and is sending untagged packets, the untagged packets will be accepted on the N9K.

The "vlan  dot1q tag native" configuration exposes this bug
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