Although the power stack in the example has extra capacity that gets in the power pool, it is not sufficient to power the switch D and PoE devices attached to it. To get the system in balance and to have a positive power budget, we must add more power to the stack; a 350W power supply will solve the problem but it must be installed in slot A of switch D (see the “Best Practices” section). W ith the addition of a 350W power supply we can make the power budget positive and have additional 241W left over in case more power is required by switch B or switch D.

Cisco StackPower technology provides us the ability to share and redirect surplus power from switch C to switch D, which does not have any power supply. Note that switch D even boots up without a power supply, since the StackPower allocates and directs power to it.

Cisco StackPower also has the ability to provide redundancy without the extra rack-unit in the rack. By adding one 1100W power supply to any of the open slots in the power stack, you can configure reserved power to be used in case of the failure of any power supply in the stack. This feature is called Zero-Footprint RPS.

Displaying Cisco StackPower Information

The Cisco IOS Software command-line interface (CLI) can be used to view Cisco StackPower details in terms of configured mode, StackPower port status, neighbor information, and power requirements as well as default and configured priorities.

“show stack-power”

Power stack name: Powerstack-1

Stack mode: Power sharing strict

Switch 1:

Power budget: 1646

Low port priority value: 27

High port priority value: 26

Switch priority value: 4

Port 1 status: Not shut

Port 2 status: Not shut

Neighbor on port 1: 0022.bdcf.9200

Neighbor on port 2: 0000.0000.0000

Switch 2:

Power budget: 206

Low port priority value: 19

High port priority value: 18

Switch priority value: 3

Port 1 status: Not shut

Port 2 status: Not shut

Neighbor on port 1: 0000.0000.0000

Neighbor on port 2: 0022.bdd0.6680

The “show env” command can complement the information to obtain the available power sources in the stack. Notice in the output below, switch 1 only has one 1100W power supply and switch 2 has one 1100W in slot A and one 715W in slot B.

© 2012 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.

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Cisco Systems STACKT150CM manual Displaying Cisco StackPower Information, Show stack-power

STACKT150CM specifications

The Cisco Systems STACKT150CM is an advanced technology solution designed to meet the diverse networking needs of modern businesses. This system, part of Cisco's extensive product line, highlights the company's commitment to delivering reliable and high-performance networking equipment.

One of the main features of the STACKT150CM is its flexibility in deployment. The unit can be integrated into a variety of network architectures, supporting both enterprise and small business environments. Its modular design allows for efficient scalability, enabling organizations to expand their network capacity as their needs grow. This adaptability makes the device suitable for both existing networks and new setups.

In terms of performance, the STACKT150CM is equipped with high-speed switching capabilities. It operates at impressive speeds, ensuring minimal latency and reinforced reliability in data transmission. This is essential for businesses that rely on real-time data processing and communication. The device supports various protocols, enhancing its compatibility with a wide array of devices and applications within an organization’s infrastructure.

Security features are a significant focus in the design of the STACKT150CM. It incorporates advanced security measures to protect against unauthorized access and cyber threats. This includes built-in firewall capabilities and support for network segmentation, which helps isolate critical data and applications from potential vulnerabilities. With the increasing prevalence of cyberattacks, these features are essential for safeguarding sensitive information.

The STACKT150CM also leverages Cisco's innovative software-defined networking technologies, which provide enhanced control and automation capabilities. Administrators can manage the network more efficiently, allowing for quicker adjustments and responses to changing network demands. This is critical in today’s fast-paced business environment, where operational flexibility and responsiveness are paramount.

Additionally, the device boasts robust energy efficiency features. Its design minimizes power consumption without compromising performance, aligning with the growing emphasis on sustainability in technology. This not only reduces operational costs but also positions organizations as socially responsible entities.

In conclusion, the Cisco Systems STACKT150CM represents a powerful offering in network solutions, combining flexibility, security, performance, and efficiency. It is an ideal choice for businesses looking to enhance their network infrastructure while preparing for future growth and technological advancements.