Gigamon GigaVUE-HC3, Hardware Installation Manual

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58 GigaVUE-HC3 Hardware Installation Guide
Calculating Redundant Power
The power redundancy of the system is calculated based on the number of PSMs
currently available that are in an
up and running state.
The GigaVUE-HC3 has a total of four PSMs. A system is declared power redundant if
there are a minimum of two PSMs in an up and running state and if the power from one
of the PSMs can keep the current system fully up.
If two PSMs are up and running, a system is declared power redundant if the required
power of the modules and the base power can be addressed by one of the PSMs.
In summary, redundant power is calculated based on the total power needed by the
modules and the PSMs available in the system and their capacity.
While a single PSM can power the entire chassis, the GigaVUE-HC3 can be configured
with up to four PSMs for power redundancy. To be considered redundant power, there
must be more than one PSM. Two PSMs can provide 1+1 power redundancy. Four
PSMs can provide 2+2 power redundancy.
Power management scans all four power slots and stores the lowest rated Watts by
product code and input voltage. The lowest rated Watts for each group of two PSMs is
used to determine the redundant power pool. To be determined for the redundant
power pool, the PSM must be present and have a status of
on .
Table 3-5 on page 58 shows the total redundant power with three eligible PSMs, where
there is one group of two PSMs for 1+1 redundancy and a single third PSM. The lowest
rated module is 1100W in slot 1. Therefore, the total redundant power is 1100W.
Table 3-5: Total Redundant Power with Three PSMs
PSM Slot Power (Watts) Status
AC PSM 110V 1 1100W on
AC PSM 208V 2 1500W on
3 Empty
AC PSM 208V 4 1500W on
Total Redundant Power 1100W