Juniper EX4300 Series Hardware Manual page 27

Table 3: Components in 48-Port EX4300 Switches
Switch Models Built-In Ports
(Continued)
Number Fan Modules
of PoE-
enabled
Ports
Power Supply Supported Uplink
Shipped by Modules
Default
19.2R1, the uplink
module supported
only one 100-
Gigabit Ethernet
transceiver. If you
configure both the
ports on the uplink
module to operate
at 100-Gbps
speed, the four
QSFP+ ports on
the switch are
disabled.
The switch
supports the 4-
port 1-Gigabit
Ethernet/10-
Gigabit Ethernet
SFP+ uplink
module (model
number: EX-
UM-4SFPP-MR)
from Junos OS
Release 18.2R1
onwards. Starting
in Junos OS
Release 19.1R1,
you can install SFP
transceivers in the
uplink module. In
Junos OS Release
18.2R1 through
Junos OS Release
18.4R1, the uplink
module supported
only SFP+
transceivers.
17