Figured it out. The frames I was seeing on the sonicwall were spanning tree BPUs which are sent untagged to each port every 2 seconds by default once spanning tree is active. Once I turned off spanning tree on my trunk port the untagged frames stopped.
Hello, On my Sonic Wall's packet monitor, I keep seeing untagged frames coming in on my parent X0 interface. Does anyone have any ideas about this? I currently have 4 sub interfaces configured on X0, and one trunk port running from my switch to X0 The trunk config looks like this: Name: gi1/0/1 Switchport: enable Administrative Mode: general Operational Mode: up Access Mode VLAN: 71 Access Multicast TV VLAN: none Trunking Native Mode VLAN: 4094 (Inactive) Trunking VLANs Enabled: 70-73                         2-69,74-4094 (Inactive) General PVID: 71 General VLANs Enabled: 70-73 General Egress Tagged VLANs Enabled: 70-73 General Forbidden VLANs: none General Ingress Filtering: enabled General Acceptable Frame Type: all General GVRP status: disabled Customer Mode VLAN: none Private-vlan promiscuous-association primary VLAN: none Private-vlan promiscuous-association Secondary VLANs Enabled: none Private-vlan host-association primary VLAN: none Private-vlan host-association Secondary VLAN Enabled: none DVA: disable Classification rules: Classification type Group ID VLAN ID ------------------- -------- -------    interface gigabitethernet1/0/1  switchport mode general  switchport general allowed vlan add 70-73 tagged  switchport access vlan 71  switchport general pvid 71  switchport trunk native vlan 4094  switchport trunk allowed vlan remove 1
Powerconnect 5548 sending untagged frames to Sonicwall