Juniper EX4300 Series Hardware Manual page 28

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
Uplink Modules
EX4300 switches provide one slot for installing an optional uplink module. You can use the uplink
module ports to connect the switch to other devices. You can also configure these ports on EX4300
switches except EX4300-48MP and EX4300-48MP-S switches as VCPs and use them to interconnect
EX4300 switches to form a Virtual Chassis or a VCF configuration by using SFP+ transceivers.
NOTE: You cannot configure the ports on the uplink module in EX4300-48MP and
EX4300-48MP-S switches as Virtual Chassis ports (VCPs).
Table 4 on page 19 lists the uplink modules supported on 24-port and 48-port EX4300 switches except
EX4300-48MP and EX4300-48MP-S switches.
on 32-port EX4300 switch models.
EX4300-48MP and EX4300-48MP-S switches.
Understanding EX Series Virtual
Virtual Chassis Fabric Overview.
Table 5 on page 19
Table 6 on page 20
lists the uplink modules supported
lists the uplink module supported on
Chassis. For more
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