7210 SAS component redundancy is critical to reducing MTTR for the routing system.
This feature is supported on all 7210 SAS platforms as described in this document, including those operating in access-uplink mode.
Component redundancy consists of the following:
redundant power supply
The use of 2 power supplies is supported for redundant power supplies. A power module can be removed without impact on traffic when redundant power supplies are in use. The power supply is hot swappable. The 7210 SAS-S 1/10GE platform supports a single fixed non-removable integrated power supply and a hot-swappable power supply.
On the 7210 SAS-S 1/10GE platform, if the device is booted with a power entry module and there is a power supply, the system detects the power supply. If the device is booted with a power entry module but there is no power supply, the system does not detect the ‟power-supply type”. This occurrence is reported as none and the PS LED is OFF.
On the 7210 SAS-S 1/10GE platform, there is no DC input failure detection that is classified separately. In the case of a failure, the system reports the DC power value as ‟failed.”
fan module
Failure of one or more fans does not impact traffic. Failure of a single fan is detected and notified. The fan tray and fan module is hot-swappable:
On the 7210 SAS-R6 and 7210 SAS-R12, the fan module/tray contains 6 fans.
On the 7210 SAS-Mxp and 7210 SAS-T, the fan module/tray contains 3 fans.
On the 7210 SAS-Sx 1/10GE and 7210 SAS-Sx 10/100GE, the fan module is not supported. The devices contain a fixed set of one or more fans with filters on both sides of the chassis.
On the 7210 SAS-S 1/10GE, the fan module is not supported. The devices contain a fixed set of one or more fans without filters.
On the 7210 SAS-R6 and 7210 SAS-R12, 2 x Switch Fabric/Control Processor Module (SF/CPM) can be used to provide control plane redundancy with non-stop routing and non-stop services. The SF/CPM is hot-swappable.