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• If Power Grid #1 fails, PSUs 4-6
will continue to operate from Power Grid
#2
• If Power Grids #1 and #2 are
operational, the system can suffer the
failure of up to 3 PSUs in a 6-PSU
configurations without affecting the
operation of the chassis.
Figure 3 – AC Grid Redundancy – Loss of a power grid allows for uninterrupted operation.
Should either of these failure scenarios occur, the MX7000 will set a fault and can be configured to send notification of
the issue.
Whether a single or dual AC Grid is employed,
the MX7000 can be configured to support DC
Redundancy. This configuration allows for 1 or
more PSUs to fail yet keep the chassis fully
operational.
As shown in Figure 4, the failure of one PSU
will not cause failure of the chassis DC power
bus. The likelihood of multiple power supplies
failing at the same time is remote. If additional
PSU capacity is installed (i.e. installing a fourth
PSU in the bottom example of Figure 4), the
chassis can suffer multiple PSU failures without
affecting system operation.
By default, the MX7000 is configured with no
redundancy policy selected. If there is sufficient
PSU capacity (i.e. extra PSUs above the
capacity needed to operate the chassis), the
system will continue to operate if there are any
PSU failures. However, no fault will be raised.
Figure 4 – DC Redundancy, 2 AC Grid or Single Grid