Juniper EX4300 Series Hardware Manual page 72

Table 14: Uplink Modules in EX4300-48MP and EX4300-48MP-S Switches
Uplink Module Model Number
Name
2-port 40-Gigabit EX-UM-2QSFP-MR
Ethernet QSFP+/
100-Gigabit
Ethernet QSFP28
uplink module
Description Supported EX4300
Switches
You can install two
•
QSFP+ transceivers,
two QSFP28 •
transceivers, or a
combination of one
QSFP+ transceiver
and one QSFP28
transceiver in this
uplink module.
NOTE: You cannot
configure the ports
on the uplink
module in
EX4300-48MP and
EX4300-48MP-S
switches as Virtual
Chassis ports
(VCPs).
First Junos OS
Release
Junos OS Release
EX4300-48MP
18.4R1
EX4300-48MP-
NOTE: Starting in
S
Junos OS Release
19.3R1, you can
install two 100-
Gigabit Ethernet
QSFP28
transceivers in the
uplink module. In
Junos OS Release
18.4R1 through
Junos OS Release
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. See
Setting the
Operating Mode on
a 2-Port 40-Gigabit
Ethernet QSFP+/
100-Gigabit
Ethernet QSFP28
Uplink
62
Module.