Switch Owner's Manual

Using the Passport 8100 Modules
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Redundant Passport 8190SM Modules
When you install two Passport 8190SM modules in a Passport 8000 Series
chassis, one provides the active CPU functions for the switch; the CPU subsystem
on the other module is in standby mode. If the active CPU fails, the standby CPU
assumes the CPU functions for the switch within 1 second. Then the module
relearns the routing databases for the switch.
If two Passport 8190SM modules are installed in the chassis when you turn on
switch power, the module in slot 5 becomes the active CPU; the module in slot 6
is in standby mode.
Redundant Power Supplies
A Passport 8000 Series chassis supports redundant power supplies. Both AC and
DC power supplies are available, and they may be combined in the same chassis.
The Passport 8010 Chassis with more than six installed modules requires a
minimum of two power supplies for a nonredundant configuration. A redundant
configuration for such a chassis requires three power supplies.
In a chassis with a nonredundant power supply configuration, if one power supply
fails, the system loses power and network connectivity.
In a chassis with two installed power supplies, you can add a third power supply
without removing power to the chassis. In a chassis with a redundant power
configuration, you can hot-swap any one power supply while the chassis
continues to operate with no interruption of service (Table 1-1
).