Unit 1: Network Infrastructure
This will allow you to demonstrate your networking skills, knowledge, and abilities, with a focus on enterprise-level switching, routing, and multicast components that support cross-platform (inter)operability and integration with the most recent software-defined technologies.
A spanning tree protocol (STP) message unit called a bridge protocol data unit (BPDU) describes the characteristics of a switch port, like its MAC address, priority, and cost to achieve. This lets switches that are part of the Spanning Tree Protocol send and receive information.
A BPDU Guard
To safeguard the switching network, BPDU Guard protects the Layer 2 Spanning Tree Protocol (STP) topology from threats linked to BPDUs. Ports that aren’t supposed to receive BPDUs from connected devices need to have the BPDU guard function turned on. You need to establish connections to end devices (such as servers, workstations, printers, etc.) in order to configure the Spanning Tree Protocol (STP) PortFast feature on switches. In order to expedite the transition from the access port to the STP forwarding state, PortFast is only enabled on that port. Since BPDU messages are often exchanged by network switches in a typical network setting, end devices are not required to generate these BPDU’s.
A preventive approach to avoid a potential bridging loop is the BPDU Guard to block interfaces. The Spanning Tree domain is protected from outside interference by means of the BPDU Guard mechanism. While not enabled by default, BPDU Guard is strongly advised for any ports with the Port Fast functionality enabled. On ports without Spanning Tree enabled, this stops erroneous data from entering the Spanning Tree domain.
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