Juniper EX4400 - Page 22

Table 5: Extension Modules Supported on EX4400 Switches (Connued)
Extension
Module
Descripon First Junos OS
Release
4x25GbE
SFP28
extension
module
(model
number:
EX4400-
EM-4Y)
The 4x25GbE SFP28 extension module supports Media Access Control
Security (MACsec) with AES-256 encrypon. You can install up to four
10GbE SFP+ transceivers or four 25GbE SFP28 transceivers in the
extension module. Do not install SFP+ transceivers and SFP28
transceivers in the extension module at the same me.
Figure 3: 4x25GbE SFP28 Extension Module for EX4400
Switches
1—
Capve screws
3—
SFP28 ports
2—
LEDs
21.1R1
Extension modules and transceivers are not part of the shipping conguraon. You must order them
separately.
When you install an extension module in the switch or replace an extension module with another
extension module, the switch detects the extension module. The output of the show chassis pic fpc-slot
slot number pic-slot slot number command displays the operang speed of the extension modules. You
must congure the extension module to operate at the speed of the transceiver that you plan to install
in the extension module. The switch detects the transceiver that you install in the extension module
port and displays the transceiver details in the output of the show chassis hardware command.
The 1x100GbE QSFP28 extension module operates in 100-gigabit mode by default. It operates in 40-
gigabit mode if you insert a 40GbE QSFP+ transceiver. When the extension module is operang in 100-
gigabit mode, you can channelize the port and congure it to operate in 25-gigabit mode by using the
set chassis fpc 0 pic-slot 2 port 0 channel-speed 25g command and a 4x25GbE breakout cable. When the
extension module is operang in 40-gigabit mode, you can channelize the port and congure it to
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