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Catalyst 3750-X and 3560-X Switch Software Configuration Guide
OL-25303-03
Chapter 1 Configuring Catalyst 3750-X StackPower
Configuring Cisco StackPower
If the 715 W or 1100 W power supply fails, devices (powered devices connected to PoE ports and the
switches themselves) would be shut down in the this order until power consumption drops below 105%
of the rated power of the remaining power supplies:
• Devices connected to Switch 4 low priority ports (priority 27)
• Devices connected to Switch 4 high priority ports (priority 26)
• Devices connected to Switch 3 low priority ports (priority 22)
• Devices connected to Switch 3 high priority ports (priority 21)
• Devices connected to Switch 1 low priority ports (priority 17)
• Devices connected to Switch 1 high priority ports (priority 16)
• Devices connected to Switch 2 low priority ports (priority 12)
• Devices connected to Switch 2 high priority ports (priority 11)
• Switch 4 (priority 4)
• Switch 3 (priority 3)
• Switch 1 (priority 2)
Switch 2 would never have to be shut down because all power would have been lost by the time priority 1
devices were reached.
The output from the show stack-power load-shedding order command shows the order in which
devices would shut down in the event of load-shedding:
Switch# show stack-power load-shedding order powerstack-1
Power Stack Stack Stack Total Rsvd Alloc Unused Num Num
Name Mode Topolgy Pwr(W) Pwr(W) Pwr(W) Pwr(W) SW PS
-------------------- ------ ------- ------ ------ ------ ------ --- ---
Powerstack-1 SP-PS Ring 2880 34 473 2373 2 4
Priority Load Switch or PoE
Shed Order Type Devices Shed
---------- ---- ------------------------------------------------------------
22 Lo Gi2/0/16,
21 Lo Gi1/0/13, Gi1/0/20,
12 Hi Gi1/0/7,
4 Sw Switch: 2
3 Sw Switch: 1
Configuring Cisco StackPower
Configuring Cisco StackPower includes these tasks:
• Identifying a stack ID and setting the power stack mode for the power stack to power sharing or
redundant with a strict or non-strict (loose) adherence to the power budget. See the “Configuring
Power Stack Parameters” section on page 1-7.
• Configuring switches in the power stack with the power stack ID and setting the priority on PoE
ports to high or low. See the “Configuring Power Stack Switch Power Parameters” section on
page 1-8.
• Setting priority values for switches in the power stack and for the high and low priority ports on the
switch to determine load-shedding order. See the “Configuring PoE Port Priority” section on
page 1-9.
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