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Dell PowerEdge FN I/O Module Configuration Guide 9.10(0.0)

PDF

Configuring an EdgePort

The EdgePort feature enables interfaces to begin forwarding traffic approximately 30 seconds sooner.

In this mode an interface forwards frames by default until it receives a BPDU that indicates that it should behave otherwise; it does not go through the Learning and Listening states. The bpduguard shutdown-on-violation option causes the interface hardware to be shut down when it receives a BPDU. When you only implement bpduguard, although the interface is placed in an Error Disabled state when receiving the BPDU, the physical interface remains up and spanning-tree drops packets in the hardware after a BPDU violation. BPDUs are dropped in the software after receiving the BPDU violation.

This feature is the same as PortFast mode in spanning tree.

  • CAUTION: Configure EdgePort only on links connecting to an end station. EdgePort can cause loops if you enable it on an interface connected to a network.

To enable EdgePort on an interface, use the following command.

Enable EdgePort on an interface. INTERFACE mode spanning-tree pvst edge-port [bpduguard | shutdown-on-violation]
The EdgePort status of each interface is given in the output of the show spanning-tree pvst command, as previously shown.
Dell Networking OS Behavior : Regarding the bpduguard shutdown-on-violation command behavior:
  • If the interface to be shut down is a port channel, all the member ports are disabled in the hardware.
  • When you add a physical port to a port channel already in an Error Disable state, the new member port is also disabled in the hardware.
  • When you remove a physical port from a port channel in an Error Disable state, the Error Disabled state is cleared on this physical port (the physical port is enabled in the hardware).
  • You can clear the Error Disabled state with any of the following methods:
    • Perform a shutdown command on the interface.
    • Disable the shutdown-on-violation command on the interface (the no spanning-tree stp-id portfast [bpduguard | [shutdown-on-violation]] command).
    • Disable spanning tree on the interface (the no spanning-tree command in INTERFACE mode).
    • Disabling global spanning tree (the no spanning-tree command in CONFIGURATION mode).

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