Configuring An Edgeport - Dell S4820T Configuration Manual

For the default, refer to the default values shown in the table..
2. Change the port priority of an interface.
INTERFACE mode
spanning-tree msti number priority priority
The range is from 0 to 240, in increments of 16.
The default is 128.
To view the current values for these interface parameters, use the show config command from
INTERFACE mode.

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 implement only 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 mstp edge-port [bpduguard | shutdown-on-violation]
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).
– The reset linecard command does not clear the Error Disabled state of the port or the
Hardware Disabled state. The interface continues to be disabled in the hardware.
– You can clear the Error Disabled state with any of the following methods:
* Use the shutdown command on the interface.
* Disable the shutdown-on-violation command on the interface (using the no spanning-
tree stp-id portfast [bpduguard | [shutdown-on-violation]] command).
* Disable spanning tree on the interface (using the no spanning-tree command in
INTERFACE mode).
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Multiple Spanning Tree Protocol (MSTP)