Chapter 27

PVST+

PVST+ (Per-VLAN Spanning Tree Plus) provides for load balancing of VLANs across multiple ports resulting in optimal usage of network resources. PVST+ also ensures interoperability with industry accepted PVST+ protocols.

NOTE: PVST+ is disabled by default.

Topics in this chapter include:

•"Understanding PVST+ Interoperability and Best Practices" on page 490

•"Enabling PVST+ in the CLI" on page 490

•"Enabling PVST+ in the WebUI" on page 491

Understanding PVST+ Interoperability and Best Practices

The interoperability between RSTP and PVST+ are:

•When the access port on the controller and the trunk port terminate on one Layer 2 switch running PVST+, PVST+ will send untagged STP BPDUs on the access port; it also transmits untagged STP BPDUs (in addition to the other PVST+ BPDUs) on the native VLAN trunk port. If the Dell controller is the root, it will detect a loop on the native VLAN.

NOTE: If PVST+ is not on the controller, best practices recommends disabling RSTP on the Dell controller to avoid a looping issue.

•For VLAN load balancing when Dell controllers are connected to armed mode, the VLAN priorities on two ports and bridge priorities must be configured so that one set of VLANs are active on one link and the other set of VLANs are active on the other link.

•Supported instances are 64 on the W-7200 Series, W-6000M3, and W-3000 Series; 32 on the W-600 Series.

Enabling PVST+ in the CLI

PVST+ is disabled by default. Enable PVST+, ensure a VLAN instance is configured, and then configure PVST+.

1.Enable PVST+: spanning-tree mode rapid-pvst

2.Configure PVST+ forward time; the following command sets the time VLAN 2 spends in the listening and learning state (3 seconds).

spanning-tree vlan 2 forward-time 3

3.Configure PVST+ hello time; the following command sets the time VLAN 2 waits to transmit BPDUs to four seconds:

spanning-tree vlan 2 hello-time 4

Dell PowerConnect W-Series ArubaOS 6.2 User Guide

PVST+ 490

Page 489 Page 491
Page 490
Image 490
Dell 6.2 manual Understanding PVST+ Interoperability and Best Practices, Enabling PVST+ in the CLI
Page 489 Page 491

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.
Top Page Image Contents