An STP device has only one root port, and there is no root port on the root bridge. Designated port: The designated port is located on a designated bridge and forwards configuration BPDUs to the device or LAN, as illustrated in Figure 1. AP1 and AP2 are ports of S1; BP1 and BP2 ...
What Is STP Loop Protection? In a network governed by a spanning tree protocol, a switching device maintains the status of the root port and the blocked port by continuously receiving Bridge Protocol Data Units (BPDUs) from the upstream switching device. However, if ports fail to receive BPDU...
STP Implementation STP is implemented as follows: Select the root bridge: During network initialization, every STP-capable device considers itself the root bridge and sets the root bridge ID to its own BID. These devices then exchange configuration BPDUs and compare their root bridge IDs to find...
At the heart of STP is the spanning tree algorithm that runs on each STP-enabled bridge. Thealgorithmwas specifically designed to avoid bridge loops when redundant paths exist. It uses the BPDUs to identify redundant links and select the best data path for forwarding messages. The algorithm als...
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Configuring BPDU Protection # Run the stp bpdu-protection command in the system view to configure BPDU protection. <HUAWEI> system-view [HUAWEI] stp bpdu-protection After the configuration is complete, run the display stp active command in any view to check the BPDU protection status based on ...
is enabled, STP checks whether the root port and the alternate port can receive BPDUs. If a port enabled with the loop protection function does not receive any BPDU, the port does not change to the Forwarding state but remains in the Discarding state. In this manner, loops can be ...
When STP is first enabled on a switch, it assumes that it is the root bridge and begins broadcasting BPDU (Bridge Protocol Data Unit) messages to other switches. Each switch that receives the BPDU message compares the bridge ID of the sending switch with its own bridge ID. The switch with...
When STP is enabled on a switch, it sends BPDU (Bridge Protocol Data Unit) messages to other switches in the network to exchange information about network topology and identify the root bridge. The root bridge is the switch with the lowest bridge ID and serves as the central point of contro...
The switch generates a Topology Change Notification （TCN） BPDU.;The port becomes a normal STP switch port.