Juniper EX9214 Hardware Manual page 72

backup RE module is hot-insertable and hot-removable, whereas the primary RE module is only hot-
insertable. See Figure 21 on page 62
a USB memory card that loads the Junos OS.
NOTE:
• In EX9214 switches, you must install an RE module only in the SF modules installed in slots 7
and 8 labeled 0 and 1.
• If you have installed only one RE module, you must power off the switch before removing the
RE module.
A base-configuration EX9204, EX9208, or EX9214 switch has only one RE module. See
Configurations EX9208 Switch Configurations
,
add a second RE module to the configuration for redundancy.
NOTE: We recommend that you install two RE modules in EX9204, EX9208, and EX9214
switches for redundancy.
The RE module performs the following functions:
• Provides switching functionality to the switch through the switching plane
• Powers the line cards on and off
• Controls system resets and the boot sequence for the switch
• Monitors and controls the fan speed, power status for various chassis components, and craft
interface LEDs
The switch ships with the RE modules preinstalled. There are two copies of the software:
• One copy on the solid-state drive (SSD) in the RE module.
• One copy on a USB flash drive that can be inserted into the slot on the RE module faceplate.
The RE module boots from the storage media in the following order: the USB device (if present), then
the SSD, and finally the LAN.
NOTE: Starting with Junos OS Release 17.1R1, EX9200 switches support the EX9200-RE2
module. The EX9200-RE2 module supports virtual machine (VM) architecture in an EX9200
and Figure 22 on page 63. A USB port on the RE module accepts
, and "EX9214 Switch Configurations" on page
61
EX9204 Switch
9. You can