40-Gigabit Ethernet QSFP+/100-Gigabit Ethernet QSFP28 uplink module can house two QSFP+
transceivers, two QSFP28 transceivers, or a combination of one QSFP+ transceiver and one QSFP28
transceiver. The 4-port 1-Gigabit Ethernet/10-Gigabit Ethernet SFP+ uplink module can house four SFP
transceivers, four SFP+ transceivers, or a combination of SFP and SFP+ transceivers in the four ports on
the uplink module.
NOTE: The switch supports the 2-port 40-Gigabit Ethernet QSFP+/100-Gigabit Ethernet QSFP28
uplink module (model number: EX-UM-2QSFP-MR) from Junos OS Release 18.4R1 onwards.
Starting in 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.
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.
Figure 34 on page 65 shows the front panel of 48 port EX4300 switches except EX4300-48MP and
EX4300-48MP-S switches. Figure 35 on page 65 shows the front panel of EX4300-48MP and
EX4300-48MP-S switches.
Figure 34: Front Panel of 48-Port EX4300 Switches Except EX4300-48MP and EX4300-48MP-S Switches
Figure 35: Front Panel of EX4300-48MP and EX4300-48MP-S Switches
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