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Why doesn't my active link port show in its Vlan when executing "show vlan 1234"?

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TitleWhy doesn't my active link port show in its Vlan when executing "show vlan 1234"?
Question
Why doesn't my active link port show in its Vlan when executing "show vlan 1234"?
 
Environment
  • S-Series
  • All Firmware Versions
  • All Hardware Versions
  • In-Line Web Filter (iBoss)
  • "Show Port status" shows port is Up/Up.
  • "show vlan 1234" does not show port
  • "Show vlan static 1234" DOES show port
Answer
Spanning tree is blocking traffic on port
Disable spanning tree on both ports where the filter is attached to the switch.How to disable spanning tree per port on Modular and SecureStack switches
Additional notes

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