7210 SAS component redundancy is critical to reducing MTTR for the routing system.
The following component redundancy features are supported on the 7210 SAS-D and 7210 SAS-Dxp:
AC or DC power supply
The 7210 SAS-D and 7210 SAS-Dxp each have an integrated AC or DC power supply. A redundant external backup power supply is available only on the 7210 SAS-D ETR variant, 7210 SAS-Dxp 12p ETR variant, 7210 SAS-Dxp 16p, and 7210 SAS-Dxp 24p. Use of redundant external backup power is optional. The external backup power supply cannot be used with the 7210 SAS-D standard variant and 7210 SAS-Dxp 12p standard variant.
The 7210 SAS-Dxp 16p and 7210 SAS-Dxp 24p provide two power input pins to connect external power supplies for power redundancy. The external power supply can be equipped with various power supply units to meet specific PoE requirements. See the 7210 SAS-Dxp 16p/24p Chassis Installation Guide and 7210 SAS-D, Dxp, K 2F1C2T, K 2F6C4T, K 3SFP+ 8C Interface Configuration Guide for more information.
chassis cooling
7210 SAS-D 128 MB devices support passive cooling. The device also has a fan to allow air circulation (and not cooling). By default, the fan mode is set to auto mode. In auto mode, by default, the software determines when to turn the fan on and when to switch it off. This can be changed by the operator using the CLI command config>system>fan. Operators have an option to switch off the fan permanently or turn it on permanently.
7210 SAS-Dxp supports passive cooling; it does not have any fans.
hot swap
The power supply is integrated into the chassis. Hot swapping is not supported. The external power supply backup connection can be added or removed at any time on the 7210 SAS-D ETR variant and 7210 SAS-Dxp 12p ETR variant.
The external power supply can be added or removed at any time on the 7210 SAS-Dxp 16p and 7210 SAS-Dxp 24p.
replaceable storage media
The 7210 SAS-D internal flash device (cf1:\) cannot be replaced.
The 7210 SAS-Dxp (all variants) supports a single, field-replaceable, SD card-based storage medium.
The following component redundancy features are supported on the 7210 SAS-K 2F1C2T:
The 7210 SAS-K 2F1C2T non-ETR (standard) unit supports a single external AC power supply.
The 7210 SAS-K 2F1C2T ETR unit supports power redundancy and provides two power input pins on the rear of the unit. The user has the option to use AC, -48V DC, or +24V DC power.
There are no fans in either of the 7210 SAS-K 2F1C2T non-ETR or ETR variants; these units are passively cooled.
The 7210 SAS-K 2F1C2T (all variants) supports a single, field-replaceable, SD card-based storage medium.
The following component redundancy features are supported on the 7210 SAS-K 2F6C4T:
The 7210 SAS-K 2F6C4T non-ETR (standard) unit supports a single external AC power supply.
The 7210 SAS-K 2F6C4T ETR unit supports power redundancy and provides two power input connectors on the front panel of the unit. The unit currently only supports an external AC power supply.
There are no fans in either of the 7210 SAS-K 2F6C4T non-ETR or ETR variants; these units are passively cooled.
The 7210 SAS-K 2F6C4T (all variants) supports a single, field-replaceable, SD card-based storage medium.
The following component redundancy features are supported on the 7210 SAS-K 3SFP+ 8C:
The 7210 SAS-K 3SFP+ 8C AC and DC variants support power redundancy and provide two power input connectors on the front panel of the unit. The AC variant has two integrated AC power supplies. The DC variant has one integrated DC power supply.
There are no fans in the 7210 SAS-K 3SFP+ 8C; the unit is passively cooled.
The 7210 SAS-K 3SFP+ 8C (all variants) supports a single, field-replaceable, SD card-based storage medium.