Users Guide

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Rapid Spanning Tree Protocol (RSTP)
Rapid spanning tree protocol (RSTP) is supported on Dell Networking OS.
Protocol Overview
RSTP is a Layer 2 protocol — specied by IEEE 802.1w — that is essentially the same as spanning-tree protocol (STP) but provides
faster convergence and interoperability with switches congured with STP and multiple spanning tree protocol (MSTP).
The Dell Networking OS supports three other variations of spanning tree, as shown in the following table.
Table 61. Spanning Tree Variations Dell Networking OS Supports
Dell Networking Term IEEE Specication
Spanning Tree Protocol (STP) 802.1d
Rapid Spanning Tree Protocol (RSTP) 802.1w
Multiple Spanning Tree Protocol (MSTP) 802.1s
Per-VLAN Spanning Tree Plus (PVST+) Third Party
Conguring Rapid Spanning Tree
Conguring RSTP is a two-step process.
1. Congure interfaces for Layer 2.
2. Enable the rapid spanning tree protocol.
Related Conguration Tasks
• Adding and Removing Interfaces
• Modifying Global Parameters
• Modifying Interface Parameters
• Conguring an EdgePort
• Prevent Network Disruptions with BPDU Guard
• Inuencing RSTP Root Selection
• Conguring Spanning Trees as Hitless
• Enabling SNMP Traps for Root Elections and Topology Changes
Important Points to Remember
• RSTP is disabled by default.
• Dell Networking OS supports only one Rapid Spanning Tree (RST) instance.
• All interfaces in virtual local area networks (VLANs) and all enabled interfaces in Layer 2 mode are automatically added to the
RST topology.
• Adding a group of ports to a range of VLANs sends multiple messages to the rapid spanning tree protocol (RSTP) task, avoid
using the range command. When using the range command, Dell Networking recommends limiting the range to ve ports and
40 VLANs.
Rapid Spanning Tree Protocol (RSTP)
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