Juniper EX4300 Series Hardware Manual page 32

• For EX4300-48MP and EX4300-48MP-S switches:
• QSFP+ ports
By default, the built-in QSFP+ ports are dedicated VCPs. In 48-port EX4300 switches except
EX4300-48MP and EX4300-48MP-S switches, you can use the QSFP+ ports as network ports or as
VCPs. You can also use the SFP+ uplink module ports to connect members of a Virtual Chassis or a
VCF across multiple wiring closets by configuring these ports as VCPs.
In EX4300-48MP and EX4300-48MP-S switches, you can use only the built-in QSFP+ ports as VCPs
to connect the switch in a Virtual Chassis. You cannot configure the ports on the uplink module in
EX4300-48MP and EX4300-48MP-S switches to Virtual Chassis ports (VCPs). You cannot configure
the built-in QSFP+ ports as network ports.
NOTE: EX4300-48MP switches can be a part of an EX4300 Virtual Chassis with other
EX4300 switches only. If you want to create a Virtual Chassis comprising EX4300-48MP
switch and other EX4300 switches, you must connect it to a 40-Gbps port on the other
EX4300 switches in the Virtual Chassis configuration. In a Virtual Chassis configuration
comprising EX4300-48MP switches, EX4300 switches can be configured only in the line card
role.
For more information about Virtual Chassis, see
information about VCFs, see
Power Supplies
EX4300 switches except EX4300-48MP and EX4300-48MP-S switches support AC or DC power
supplies with different airflow directions. EX4300-48MP and EX4300-48MP-S switches support only
AC power supplies with front-to-back airflow. Power supplies for the EX4300 switch are fully
redundant, load-sharing, and hot-removable and hot-insertable FRUs. All the EX4300 switch models
except EX4300-24T-S, EX4300-24P-S, EX4300-32F-S, EX4300-48T-S, EX4300-48P-S, and
EX4300-48MP-S switches are shipped with one power supply preinstalled in the rear panel of the
switches. EX4300-24T-S, EX4300-24P-S, EX4300-32F-S, EX4300-48T-S, EX4300-48P-S, and
EX4300-48MP-S switches are not shipped with preinstalled power supplies; you must order the power
supplies separately.
Each power supply has a label—AIR IN (AFI) or AIR OUT (AFO)—on the faceplate of the power supply
that indicates the direction of airflow. AIR IN (AFI) labels indicate back-to-front airflow while AIR OUT
(AFO) labels indicate front-to-back airflow.
Table 7 on page 23 lists the AC and DC power supplies used in EX4300 switches and the direction of
airflow in them.
Understanding EX Series Virtual
Virtual Chassis Fabric Overview.
Chassis. For more
22