Cisco STACKT150CM - Manuals

Cisco STACKT150CM – Manual in PDF format online.

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Manual

Manual Cisco STACKT150CM

Summary

Page 2 - Technology Overview

© 2012 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information. Page 2 of 17 Cisco StackPower technology immediately produces savings by reducing the number of power supplies required per switch and the number of outlets required in the wiring closet. Additional s...

Page 3 - StackPower operation

© 2012 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information. Page 3 of 17 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 S...

Page 4 - a power stack without booting Cisco IOS Software.; Adding a new switch to a power stack; power supply itself nor it turn off any power supply.

© 2012 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information. Page 4 of 17 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 budg...

Page 5 - Cisco StackPower and XPS Cables; plugs into what switch or XPS.

© 2012 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information. Page 5 of 17 Figure 4. Ring Topology Figure 5. Star Topology, Using an XPS The Cisco StackPower cables are thick but flexible, and they carry power as well as a data signal to provide a communications...

Page 6 - power pool among the switches participating in the power stack.

© 2012 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information. Page 6 of 17 An XPS cable has a color band on the cable ends as well, red on one end and yellow on the other end. This cable can only be used to connect Catalyst 3750-X or 3560-X switch to an XPS. Not...

Page 7 - Use Case for the Cisco StackPower Feature; Figure 6. Power Stack of Four Switches; extra power capacity of 154W is available.

© 2012 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information. Page 7 of 17 Use Case for the Cisco StackPower Feature Figure 6. Power Stack of Four Switches The following use cases will help you understand the Cisco StackPower technology and its main features. Sw...

Page 8 - StackPower allocates and directs power to it.; Displaying Cisco StackPower Information; configured priorities.

© 2012 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information. Page 8 of 17 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 bal...

Page 9 - “show env power all”; Intelligent Power Management; curve of one switch with an optimal load.; Figure 7. Efficiency Curves; off-lining a power supply requires administrator intervention.

© 2012 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information. Page 9 of 17 “show env power all” SW PID Serial# Status Sys Pwr PoE Pwr Watts 1A NG3K-PW R-1100W AC LIT1337057T OK Good Good 1100/0 1B No Input Power Bad N/A 235/0 2A NG3K-PW R-1100W AC LIT13370597 OK...

Page 10 - purchase power supplies as the need for power grows.; Cisco StackPower Topology; Nonetheless, a stack of four is a common deployment.; Modes of Operation; will allocate all the power available in the power budget.

© 2012 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information. Page 10 of 17 A maximum of 8400W is possible in a pool of power in a stack of four switches loaded with two 1100W power supplies each. Obviously, it is excessive; even if the stack consists of four Ca...

Page 11 - Available unallocated power is 1300W

© 2012 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information. Page 11 of 17 Figure 8. Power Share Mode In the following scenario, the Cisco StackPower technology aggregates three power supplies on four switches (1100W + 1100W + 1100W + 0W = 3300W ). The load req...

Page 12 - Power Share “Strict” Mode; alarming messages to the console.; Negative budget = Available power < Allocated power; Figure 10. Redundant mode

© 2012 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information. Page 12 of 17 Power Share “Strict” Mode The power sharing mode has an inherent capability to oversubscribe itself in case of power supply failures. That is, when an imbalance occurs between available ...

Page 13 - administrator of the power stack.; Figure 11. Redundant power; Available unallocated power is 200W; RPS Mode; Intelligent Load Shedding

© 2012 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information. Page 13 of 17 configured, but it would not offline any power supply from the system. This action needs to be performed by an administrator of the power stack. The following scenario is similar to the ...

Page 14 - Priority Scheme; Figure 12. StackPower Default Priorities

© 2012 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information. Page 14 of 17 Immediate load shed occurs when a failure could cause the power stack to fail very quickly, for example a massive power failure where multiple power supplies go offline for any reason an...

Page 15 - Figure 13. Load shed sequence; shed off before a low priority port.; Best Practices

© 2012 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information. Page 15 of 17 The table shows the default priorities used by StackPower that can be overwritten by an administrator. As an example, a power stack can assign priority 2 to a switch-A, priority 10 to hi...

Page 16 - passed down to another switch in the stack.; Figure 14. Unbalanced power stack; Do not configure power stacks that span across data stacks.

© 2012 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information. Page 16 of 17 Power supply slots are named left to right, that is, power supply slot A in on the left and power supply slot B is on the right (closest to the edge of the switch). This practice allows ...

Page 17 - Off-lining power supplies are supported but it is not automatic.; For More Information; Refer to following documents:

© 2012 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information. Page 17 of 17 The recommendation is to perform the calculation of required power in the power stack and add the amount of reserved power (size of the largest power supply in the power stack) and compa...