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Cisco Systems STACKT150CM manual Adding a new switch to a power stack, Zero-Footprint RPS

Models: STACKT150CM

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Cisco Catalyst 3750-X and 3560-X Series Switches do not consume more power than the rest of the Catalyst 3750 family of switches, but the power budget required is higher. This higher budget allows each switch to budget enough power for the switch itself, to power a high power network module (if present), and to power its downstream neighbor’s StackPower logic (MCU), which is the minimum number of components in a switch to form a power stack without booting Cisco IOS Software.

The following table shows the power budget requirement for each 3560-X and 3750-X model

Table 1. Power Budget requirements for Cisco 3560-X and 3750-X Catalyst switches

Product ID

WS-C3560X-48 WS-C3560X-48P WS-C3750X-48 WS-C3750X-48P WS-C3560X-24 WS-C3560X-24P WS-C3750X-24 WS-C3750X-24P WS-C3750X-12S

WS-C3750X-24S

Power Budget Requirement 223W

190W

192W

230W

Note that with initial IOS release 12.2(53)SE2 all models had a power budget requirement of 206W.

For example, a standalone Cisco Catalyst 3750-X-48P switch (Figure 3) budgets 223W, this budget does not necessarily reflect the actual power consumption (see the data sheet for details).

Figure 3. Cisco Catalyst 3750-X-48P

Adding a new switch to a power stack

Cisco StackPower technology adds resiliency to the stack by reserving an amount of power enough to bring up the MCU of any Catalyst3750-X Series switch. This helps ensure that if and when a new switch without any power supplies is added to the power stack and does not have any power, it can join the power stack using the power that has been reserved for that purpose. This guarantees the inclusion of a new switch in the power stack; if the power stack has enough power in the power pool, Cisco StackPower will allocate power to the new switch to boot Cisco IOS Software.

Zero-Footprint RPS

The ability to provide redundancy without the need for an actual RPS is called Zero-Footprint RPS. The power stack discovers the members of the stack, aggregates power from all available sources in the stack, and subtracts from the power pool an amount of power equal to the largest power supply in the stack. It does not subtract the power supply itself nor it turn off any power supply.

In the simplest example, a power stack is formed by using a special cable to connect switches to each other to form a closed ring, similar to the topology for a Cisco StackWise stack (Figure 4). Up to four switches can be part of a power stack in a ring topology, and up to nine switches can share power in a star topology by using an eXpandable Power System (XPS) (Figure 5). Current flows through the cables that form the power stack and feed switches in need of power or complements power requirements of other switches in the stack. It is a safe system with plenty of circuit breakers spread around the printed circuit board to cut off current to different components in the system or if needed, to the system itself.

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

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Cisco Systems STACKT150CM manual Adding a new switch to a power stack, Zero-Footprint RPS
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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.