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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 only bpduguard is implemented, 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. If you enable EdgePort on an interface connected to a network, it can cause loops.
Dell Networking OS Behavior: Regarding bpduguard shutdown-on-violation 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 the Error Disable state, the new member port is also disabled in the hardware.
  • When you remove a physical port from a port channel in the 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 an 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).
    • Disable global spanning tree (the no spanning-tree command in CONFIGURATION mode).

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

Enable EdgePort on an interface. INTERFACE mode spanning-tree rstp edge-port [bpduguard | shutdown-on-violation][bpdufilter]

Example of Verifying an EdgePort is Enabled on an Interface

To verify that EdgePort is enabled on a port, use the show spanning-tree rstp command from EXEC privilege mode or the show config command from INTERFACE mode.
  • NOTE: Dell Networking recommends using the show config command from INTERFACE mode.

In the following example, the bold line indicates that the interface is in EdgePort mode. 

Dell(conf-if-te-2/0)#show config
                                 !
                                 interface TenGigabitethernet 2/0
                                 no ip address
                                 switchport
                                 
                                 spanning-tree rstp edge-port
                                 shutdown
                                 Dell(conf-if-te-2/0)#

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