Cisco Bug: CSCuq79866 - Auto config is pulling random vlan for untagged traffic on trunk port

Last Modified

Feb 10, 2017

Products (1)

Cisco Nexus 6000 Series Switches

Known Affected Releases

7.1(0)N1(0.318)

Description (partial)

Symptom:
A random vlan is getting set for auto-config when during auto-configuration of the native vlan while sending untagged traffic.

Conditions:
Auto-config has to be enabled, along with "switchport trunk native vlan <>" on the port. The profile for auto-config must move vlans from CE mode to Fabricpath. It is during this change to fabricpath the vlan is going down and packets come in on a random vlan, as there is not a native vlan up to be learned on.

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