Spanning Tree Protocol (Stp); Protocol Overview; Configure Spanning Tree; Related Configuration Tasks - Dell S4820T Configuration Manual

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Spanning Tree Protocol (STP)

The spanning tree protocol (STP) is supported on Dell Networking OS.

STP is a Layer 2 protocol — specified by IEEE 802.1d — that eliminates loops in a bridged topology by

enabling only a single path through the network.

By eliminating loops, the protocol improves scalability in a large network and allows you to implement

redundant paths, which can be activated after the failure of active paths. Layer 2 loops, which can occur

in a network due to poor network design and without enabling protocols like xSTP, can cause

unnecessarily high switch CPU utilization and memory consumption.

Dell Networking OS supports three other variations of spanning tree, as shown in the following table.

Table 79. Dell Networking OS Supported Spanning Tree Protocols

Dell Networking Term

Spanning Tree Protocol (STP)

Rapid Spanning Tree Protocol (RSTP)

Multiple Spanning Tree Protocol (MSTP)

Per-VLAN Spanning Tree Plus (PVST+)

Configuring spanning tree is a two-step process.

Configuring Interfaces for Layer 2 Mode

Enabling Spanning Tree Protocol Globally

Adding an Interface to the Spanning Tree Group

Modifying Global Parameters

Modifying Interface STP Parameters

Enabling PortFast

Prevent Network Disruptions with BPDU Guard

STP Root Guard

Enabling SNMP Traps for Root Elections and Topology Changes

Configuring Spanning Trees as Hitless

Spanning Tree Protocol (STP)

IEEE Specification