Administration Guide for Cisco Virtualization Experience Client 2111/2211 PCoIP Firmware Release 4.0
Cisco VXC 2111/2211 power considerations
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Cisco VXC 2111/2211 power considerations

Cisco VXC 2111/2211 power considerations

You can power the Cisco VXC 2111/2211 using a Cisco PWR-CUBE-4 power adapter or using standard Power over Ethernet (PoE). This appendix describes the Cisco VXC configurations that are supported by the IEEE 802.3af and IEEE 802.3at PoE standards, by Cisco Universal Power Over Ethernet (UPOE), and by the Cisco PWR-CUBE-4 power adapter.

Cisco VXC 2111/2211 USB ports are compliant with USB 2.0 standard specifications to deliver a maximum power level of 2.5 watts.

Available power on USB ports

The USB ports on the Cisco VXC 2111/2211 operate at two power levels:

  • Low: 0.5 watts
  • High: 2.5 watts

USB ports that operate at the low-power level can only power USB devices that consume up to 0.5 watts of power, and USB ports that operate at the high-power level can power USB devices that consume up to 2.5 watts of power.

USB ports on the Cisco VXC 2111/2211 that operate at high power cannot individually power any noncompliant USB accessory that requires more than 2.5 watts of power. To power devices that require between 2.5 and 5 watts of power, you can use a USB Y cable to connect the accessory to USB port 3 and 4 of the client (when these are operating at high power).

In addition, if no device is connected to a port, the Cisco VXC 2111/2211 cannot reallocate the available power from this port to a device on another port. For example, if USB ports 1 and 2 are operating at low power, and no device is connected to port 2, the Cisco VXC 2111/2211 cannot redirect the power allocated to port 2 to power a high-power device on port 1. In this case, the maximum power limit on port 1 remains unchanged at 0.5 watts.

Low-power USB devices (0.5 watts or less) are typically keyboards, mice, and joysticks, while high-power USB devices (greater than 0.5 watts) are typically bus-powered cameras, hubs, and some USB Flash drives.

USB hub support

USB ports on the Cisco VXC 2111/2211 can power a USB hub provided the hub does not draw more power than is available from the USB port to which it is connected (that is, 0.5 watts on low-power ports or 2.5 watts on high-power ports).

PoE power negotiation

When the Cisco VXC 2111/2211 is powered using PoE, the firmware performs a one-time negotiation of PoE power requirements at boot time and allocates the available power to the USB ports, power indicators, and monitors, as described in Cisco VXC 2111 power support and Cisco VXC 2211 power support. During normal operation, this power allocation does not change.

Cisco VXC 2111 power support

The following table describes the power configurations that are supported on the Cisco VXC 2111.


Note


  • IEEE 802.3af PoE does not support Cisco VXC 2111 configurations.
  • IEEE 802.3at PoE does not support the Cisco VXC 2111 if a Key Expansion Module is attached to a Cisco Unified IP Phone 8961, 9951, or 9971.

Table 1 Cisco VXC 2111 Power Support
Cisco VXC 2111 with: Power source USB Port 1 keyboard USB Port 2 mouse USB Port 3 accessories USB Port 4 accessories Monitor Port 0 Monitor Port 1 Configuration
8961 802.3at Powered (low) Powered (low) Unavailable Unavailable Powered Powered Moderate
9951 without camera 802.3at Powered (low) Powered (low) Unavailable Unavailable Powered Powered1 Moderate
9951 with camera 802.3at Powered (low) Powered (low) Unavailable Unavailable Powered Powered1 Moderate
9971 without camera 802.3at Powered (low) Powered (low) Unavailable Unavailable Powered Powered1 Moderate
9971 with camera 802.3at Powered (low) Powered (low) Unavailable Unavailable Powered Unavailable Basic
8961/ 9951/ 9971 UPOE Powered (high) Powered (high) Powered (high) Powered (high) Powered Powered Full
8961/ 9951/ 9971 PWR- CUBE- 4 Powered (high) Powered (high) Powered (high) Powered (high) Powered Powered Full
1 The values listed are applicable to Cisco VXC 2111 devices with a version ID (VID) of V02. The behavior may differ on Cisco VXC 2111 devices with a VID of V01. For example, while operating in certain moderate configurations, the Port 1 monitor may not be available on devices with a VID of V01. You can obtain the VID value from the compliance label on the underside of the device. The VID is listed at the end of the Product ID (PID). For example, CVXC-2111-W-K9 V01 indicates a V01 device and CVXC-2111-W-K9 V02 indicates a V02 device.

As an alternative to PoE, the Cisco PWR-CUBE-4 power adapter can support a Cisco VXC 2111 attached to a Cisco Unified IP Phone 8961, 9951, or 9971 (with or without camera) with up to three Key Expansion Modules in a basic configuration (keyboard, mouse, and one monitor).

If you add one or more Key Expansion Modules to the Cisco Unified IP Phone 8961, 9951, or 9971, these modules may reduce the amount of power available to the Cisco VXC client and may cause additional restrictions for powering Cisco VXC peripheral devices.


Note


If you change the power source on a Cisco VXC 2111 from PoE to a Cisco PWR-CUBE-4, you must reset the Cisco VXC for the new power allocations to take effect.


Cisco VXC 2211 power support

The following table describes power configurations that are supported on the Cisco VXC 2211.


Note


  • The Unified IP Phone PC port can provide the network connectivity for the Cisco VXC 2211; however, it does not provide power for the device. A power adapter is required when you use the Unified IP Phone PC port for network connectivity for the Cisco VXC 2211.
  • IEEE 802.3af PoE can support a Cisco VXC 2211 only in a basic configuration.

Table 2 Cisco VXC 2211 Power Support
  Power Source USB Port 1 keyboard USB Port 2 mouse USB Port 3 accessories USB Port 4 accessories Monitor Port 0 Monitor Port 1 Configuration
Cisco VXC 2211 802.3af Powered (low) Powered (low) Unavailable Unavailable Powered Unavailable Basic
  802.3at Powered (high) Powered (high) Powered (high) Powered (high) Powered Powered Full
  UPOE Powered (high) Powered (high) Powered (high) Powered (high) Powered Powered Full
  PWR- CUBE- 4 Powered (high) Powered (high) Powered (high) Powered (high) Powered Powered Full

Cisco VXC 2211 base LED behavior

The following table describes the behavior of the base LEDs when you connect power (PoE or Cisco Power Cube 4) to the Cisco VXC 2211.

Cisco VXC 2211 Base LED Behavior

Power source Client connected to power source (PoE or Power cube) Press power button for power-on (quick button press - no more than 1/2 second) Press Power button again for power-off (hold minimum 3 seconds)
IEEE 802.3af PoE No light Dim white light Light turns off
IEEE 802.3at PoE No light Dim white light Light turns off
Cisco UPOE No light Dim white light Light turns off
Cisco Power Cube 4 (plugged in AFTER network cable) Initial white light flash, then light turns off Dim white light, which becomes a bright white light after approximately 10 seconds Light turns off
Cisco Power Cube 4 (plugged in BEFORE network cable) No light Dim white light, which becomes a bright white light after approximately 10 seconds Light turns off

Power consumption

The following table describes the power consumption on the Cisco VXC 2111/2211.

Table 3 Power Consumption
Thin Client Minimum Power Consumption Maximum Power Consumption
Cisco VXC 2111 12 watts 24 watts2
Cisco VXC 2211 12 watts 24 watts
2 The values listed indicate the power consumption for the thin client only. When the Cisco VXC 2111 is attached to a Cisco Unified IP Phone, you must add the phone power consumption to calculate the total power consumption of the system.