Chapter 26

RSTP

Dell’s implementation of Rapid Spanning Tree Protocol (RSTP) is as specified in 802.1w with backward compatibility to legacy Spanning Tree (STP) 802.1D. RSTP takes advantage of point-to-point links and provides rapid convergence of the spanning tree. RSTP is enabled by default on all Dell controllers.

Topics in this chapter include:

•"Understanding RSTP Migration and Interoperability" on page 485

•"Working with Rapid Convergence" on page 485

•"Configuring RSTP" on page 487

•"Troubleshooting RSTP" on page 488

Understanding RSTP Migration and Interoperability

ArubaOS supports RSTP on the following interfaces:

•FastEthernet IEEE 802.3—fastethernet

•Gigabitethernet IEEE 802.3—gigabitethernet

•Port Channel ID—port-channel

Working with Rapid Convergence

Since RSTP is backward compatible with STP, it is possible to configure bridges RSTP (and STP) in the same network. However, such mixed networks may not always provide rapid convergence. RSTP provides rapid convergence when interfaces are configured as either:

•Edge ports—These are the interfaces/ports connected to hosts. These interfaces are immediately moved to the forwarding state. In this mode an interface forwards frames by default until it receives a BPDU (Bridge Protocol Data Units) indicating that it should behave otherwise; it does not go through the Listening and Learning states.

•Point-to-Point links—These are the interfaces/ports connected directly to neighboring bridges over a point-to- point link. RSTP negotiates with the neighbor bridge for rapid convergence/transition only when the link is point- to-point.

Table 145 compares the port states between STP and RSTP.

Table 145: Port State Comparison

STP (802.1d) Port State

RSTP (802.1w) Port State

Disabled

Discarding

Blocking

Discarding

Dell PowerConnect W-Series ArubaOS 6.2 User Guide

RSTP 485

Page 484 Page 486
Page 485
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Dell 6.2 Understanding Rstp Migration and Interoperability, Working with Rapid Convergence, Disabled Discarding Blocking
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6.2 specifications

Dell 6.2 is an advanced enterprise solution that caters to the needs of businesses seeking robust performance and efficiency. As a part of Dell's commitment to innovation, the 6.2 series combines cutting-edge technologies and features that enhance productivity and deliver reliable computing experiences.

One of the standout features of the Dell 6.2 is its impressive processing power. Equipped with the latest Intel processors, it offers exceptional speed and multitasking capabilities. This allows businesses to run demanding applications effortlessly, making it ideal for data-intensive tasks such as data analysis, software development, and virtualization. The series also supports substantial RAM configurations, enabling users to manage extensive workloads without experiencing slowdowns.

In terms of storage, the Dell 6.2 line includes advanced SSD options that significantly boost data access speeds compared to traditional hard drives. This rapid access to information is vital for businesses that require quick retrieval of large datasets. Furthermore, the devices support RAID configurations, which enhances data redundancy and security, protecting critical business information from loss.

Connectivity is another critical aspect of the Dell 6.2 series. It includes multiple USB ports, HDMI outputs, and high-speed Ethernet options, ensuring that users can easily connect to various peripherals and networks. The integration of Wi-Fi 6 technology enables faster wireless connections, resulting in improved internet speeds and bandwidth efficiency, which is crucial in today’s increasingly connected workplaces.

Dell has also prioritized security in the 6.2 series. It features enhanced biometric authentication and advanced encryption methods, safeguarding sensitive data from unauthorized access. Additionally, the system's BIOS protection and automatic updates provide an added layer of security, ensuring that the device remains safe from emerging threats.

The design of the Dell 6.2 is not only sleek and modern but also built for durability. Its robust chassis is engineered to withstand the rigors of daily use, making it suitable for various business environments. This durability ensures that the investment in Dell 6.2 will last for years while maintaining performance integrity.

In summary, the Dell 6.2 series embodies a blend of speed, storage efficiency, connectivity, and security, making it a top choice for enterprises looking to enhance their computing capabilities. With its modern features and durable design, Dell 6.2 is positioned as a reliable partner in driving business success.
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