Netgear XCM8806 Chassis User Manual - Page 73

NETGEAR 8800 User Manual • Logs power resource changes, including power budget, total available power, redundancy, and so on • Detects and isolates faulty PSUs The switch includes two power supply controllers that collect data from the installed PSUs and report the results to the MSM/MM modules. When you first power on the switch, the power supply controllers enable a PSU. As part of the power management function, the power controller disables the PSU if an unsafe condition arises. For more information about the power supply controller, see the hardware documentation listed in Chapter 1, Overview. If you have an XCM88P series Power over Ethernet (PoE) module installed in a NETGEAR 8800 series switch, there are specific power budget requirements and configurations associated with PoE that are not described in this section. For more detailed information about PoE, see Chapter 7, PoE. XCM8800 includes support for the 600/900 W AC PSU for the NETGEAR 8806 switch. You can mix existing 700/1200 W AC PSUs and 600/900 W AC PSUs in the same chassis. If you install the 600/900 W AC PSU in a chassis other than the NETGEAR 8806, XCM8800 provides enough power to boot-up the chassis, display a warning message in the log, and disable the PSU. If this occurs, you see a message similar to the following: MSM-A:Power supply in slot 6 is not supported and is being disabled. When a combination of 700/1200 W AC PSUs and 600/900 W AC PSUs are powered on in the same NETGEAR 8806 chassis, all 700/1200 W AC PSUs are budgeted "down" to match the lower powered 600/900 W AC output values to avoid PSU shutdown. For more information about the 600/900 W AC PSU, see the hardware documentation listed in Chapter 1, Overview. This section describes the following power management topics: • Initial System Boot-Up on page 73 • Power Redundancy on page 74 • Power Management Guidelines on page 74 • Overriding Automatic Power Supply Management on page 75 Initial System Boot-Up When XCM8800 boots up, it reads and analyzes the installed I/O modules. XCM8800 considers the I/O modules for power up from the lowest numbered slot to the highest numbered slot, based on their power requirements and the available system power. If the system does not have enough power, some I/O modules are not powered up. For example, XCM8800: • Collects information about the PSUs installed to determine how many are running and how much power each can supply. • Checks for PSU failures. Chapter 3. Managing the Switch | 73