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How to configure STP on a switch

Spanning Tree Protocol (STP) is a networking protocol used to prevent loops and ensure a loop-free topology in a network. STP is typically configured on network switches to prevent the formation of loops and to ensure the stability of the network.



Here are the steps to configure STP on a switch:

Access the switch's command line interface (CLI) using a terminal program like Telnet or SSH.

Configure the switch as the root bridge by setting its bridge ID to a lower value than any other switch in the network. The bridge ID is typically a combination of the switch's MAC address and a priority value.

Configure the switch's ports. Each port should be configured as either a root port, designated port, or blocked port. The root port is the port that is closest to the root bridge and is used to forward traffic to the root bridge. The designated port is the port that is closest to a downstream switch and is used to forward traffic to that switch. The blocked port is a port that is not in use and is used to prevent loops.

Configure the switch's BPDU (Bridge Protocol Data Unit) guard, which is used to prevent unauthorized switches from being added to the network.

Verify the STP configuration by checking the switch's spanning tree information, such as the root bridge, root port, designated port, and blocked port information.

Note: The specific steps to configure STP on a switch may vary depending on the switch's manufacturer and model. It is recommended to consult the switch's documentation for specific instructions.

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