Note that all power available in the power stack is combined into one single large pool of power, and the stack becomes a large single load to the power pool (Figure 2).

Figure 2. Cisco StackPower: One Power Pool, One Load

A surplus of power in a power stack enables features such as Zero-Footprint RPS and 1+N redundancy instead of the classic 1:N redundancy with dedicated external RPS.

Redundancy with Cisco StackPower is better because the redundant power is already inline (1+N), as opposed to being switched from one source to another, as in a classic RPS (1:N). The 1+N) redundancies are less susceptible to problems because the power is already available inline.

StackPower operation

Switches deployed in a power stack discover each other and exchange messages to figure out how much power is available in the stack (power budget), to set priorities (or use default priority values), and to start booting Cisco IOS® Software on all switches, depending upon the power budget available in the stack.

The boot-up sequence of events is as follows:

1.Switches are interconnected in a ring topology and power is applied.

2.All switches power up their Stack Power infrastructure (50W each, 42W in initial IOS release 12.2(53)SE2).

3.All switches participate in the power stack, exchange discovery packets, information messages regarding power resources and priorities.

4.The total budget in the power stack is discovered.

5.The power stack reserves 30W (42W in initial IOS release 12.2(53)SE2) in case a new member is dynamically added to the stack. This amount is reserved once per stack, not per switch (unless there is only one switch in the stack).

6.Budgets are distributed based on total power budget, power draw requirements, and switch priorities.

7.Switches that receive an allocation of power proceed to boot the Cisco IOS Software.

8.Switches that did not receive a power allocation will remain in the power stack without booting until more power is added to the power budget.

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

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Cisco Systems STACKT150CM manual StackPower operation, Cisco StackPower One Power Pool, One Load
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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.
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