Juniper EX4200 Hardware Manual page 36

Figure 7: SFP+ and SFP+ MACsec Uplink Module
The following transceivers can be installed in the uplink module ports:
SFP+ transceivers are supported in ports 0 and 2.
SFP transceivers are supported in all four ports.
The ports that support SFP+ transceivers are labeled 10 G on the uplink module's faceplate (see
Figure 7 on page 36).
NOTE: When an SFP+ uplink module or an SFP+ MACsec uplink module is operating in 10-gigabit
mode:
Only the 10-gigabit ports (ports 0 and 2) are enabled.
You can use only SFP+ transceivers in those ports.
When an SFP+ uplink module or an SFP+ MACsec uplink module is operating in 1-gigabit mode:
All four ports are enabled.
You can use only SFP transceivers in all four ports.
The SFP+ uplink module and the SFP+ MACsec uplink module have an LED on the faceplate (labeled
Operating mode LED in
operating in the 10-gigabit mode, the LED is lit. If the uplink module is operating in the 1-gigabit mode,
the LED is unlit.
SFP+ uplink modules and the SFP+ MACsec uplink modules are shipped with dust covers preinstalled in
the ports.
The SFP+ uplink module requires Junos OS for EX Series switches, Release 9.4 or later. The SFP+ MACsec
uplink module requires Junos OS for EX Series switches, Release 13.2X50-D10 or later.
Figure 7 on page 36) that indicates the operating mode. If the uplink module is
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