Juniper EX9214

backup RE module is hot-insertable and hot-removable, whereas the primary RE module is only hot-
insertable. See Figure 21 on page 62 and Figure 22 on page 63. A USB port on the RE module accepts
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 o the switch before removing the
RE module.
A base-conguraon EX9204, EX9208, or EX9214 switch has only one RE module. See EX9204 Switch
Conguraons , EX9208 Switch Conguraons , and "EX9214 Switch Conguraons" on page 9. You can
add a second RE module to the conguraon 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 funcons:
• Provides switching funconality to the switch through the switching plane
• Powers the line cards on and o
• Controls system resets and the boot sequence for the switch
• Monitors and controls the fan speed, power status for various chassis components, and cra
interface LEDs
The switch ships with the RE modules preinstalled. There are two copies of the soware:
• One copy on the solid-state drive (SSD) in the RE module.
• One copy on a USB ash 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 nally the LAN.
NOTE: Starng 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
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