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EX4300 Switches Hardware Overview

Juniper Networks EX4300 Ethernet Switches provide connectivity for high-density environments and scalability for growing networks. These switches can be deployed wherever you need high density of Gigabit Ethernet ports or redundancy. Typically, EX4300 switches are used in large branch offices, campus wiring closets, and data centers. In data centers, EX4300 switches can be positioned as top-of-rack switches; the top devices in a rack to provide connectivity for all the devices in the rack and provide options for optimized airflow (hot aisle/cold aisle).

Three variants of the EX4300 switches are available—24-port, 32-port, and 48-port switches, with or without PoE+, with AC or DC power supplies, and with different airflow directions. EX4300 switches also provide uplink ports and a slot for installing an optional uplink module.

You can manage EX4300 switches by using the same interfaces that you use for managing other devices running Juniper Networks Junos operating system (Junos OS)—the CLI, the J-Web graphical interface, and Junos Space.

This topic describes:

Software

Juniper Networks EX Series Ethernet Switches run Junos OS, which provides Layer 2 and Layer 3 switching, routing, and security services. The same Junos OS code base that runs on EX Series switches also runs on all Juniper Networks M Series, MX Series, and T Series routers, and SRX Series Services Gateways.

EX4300 Switches First View

EX4300 switches provide connectivity for high-density Gigabit Ethernet data center top-of-rack, enterprise, and campus aggregation/core deployments. EX4300 switches can be used in large branch offices, campus wiring closets, and data centers. In data centers, these switches can be positioned as the top devices in a rack to provide connectivity for all devices in the rack and provide options for optimized airflow (hot aisle/cold aisle).

To provide carrier-class reliability, EX4300 switches include:

  • Dual redundant, load-sharing power supplies that are hot-insertable and hot-removable field-replaceable units (FRUs).
  • Two fan modules that are field-replaceable units.
  • Redundant Routing Engines in a Virtual Chassis or QFX5100 Virtual Chassis Fabric (VCF) configuration. This redundancy enables graceful Routing Engine switchover (GRES).
  • Junos OS with its modular design that enables failed system processes to gracefully restart.

The following EX4300 switches are available:

24-Port EX4300 Switches

The 24-port EX4300 switches—EX4300-24T and EX4300-24P—provide 24 built-in 10/100/1000BASE-T Ethernet network ports and four built-in 40-Gigabit Ethernet quad small form-factor pluggable plus (QSFP+) ports that can house 40-Gigabit QSFP+ transceivers. All network ports in the EX4300-24P switch are equipped for Power over Ethernet (PoE+), whereas EX4300-24T has no PoE+ ports. 24-port EX4300 switches support AC power supply and fan module with front-to-back airflow direction and have a slot for installing an optional 4-port 10-Gigabit Ethernet SFP+ uplink module, which has four 10-Gigabit Ethernet small form-factor pluggable plus (SFP+) ports that can house four 10-gigabit small form-factor pluggable (SFP+) transceivers, four 1-gigabit small form-factor pluggable (SFP) transceivers, or a combination of four SFP+ and SFP transceivers.

Figure 1 shows the front panel of a 24-port EX4300 switch.

Figure 1: Front Panel of a 24-Port EX4300 Switch

Front Panel of a 24-Port
EX4300 Switch

Figure 2 shows the rear panel of a 24-port EX4300 switch with power supplies and fan modules installed.

Figure 2: Rear Panel of a 24-Port EX4300 Switch

Rear Panel of a 24-Port EX4300
Switch

Table 1 lists the 24-port EX4300 switch models and their components.

Table 1: Components in 24-Port EX4300 Switches

Switch Models

Built-In Ports

Number of PoE-enabled Ports

Fan Modules Shipped by Default

Power Supply Shipped by Default

Supported Uplink Module

EX4300-24T

24 10/100/1000BASE-T Ethernet ports and four QSFP+ ports

0

Two fan modules; each with an AIR OUT (AFO) label.

A 350 W AC power supply with the AIR OUT (AFO) label.

4-port 10-Gigabit Ethernet SFP+ uplink module

EX4300-24T-S

24 10/100/1000BASE-T Ethernet ports and four QSFP+ ports

0

Fan modules for this model are not shipped by default; you must separately order either two AIR OUT (AFO) labeled or two AIR IN (AFI) labeled fan modules.

Power supplies for this model are not shipped by default; you must separately order either AC power supplies or DC power supplies.

4-port 10-Gigabit Ethernet SFP+ uplink module

EX4300-24P

24 10/100/1000BASE-T Ethernet ports and four QSFP+ ports

24

Two fan modules; each with an AIR OUT (AFO) label.

A 715 W AC power supply with the AIR OUT (AFO) label.

4-port 10-Gigabit Ethernet SFP+ uplink module

EX4300-24P-S

24 10/100/1000BASE-T Ethernet ports and four QSFP+ ports

24

Fan modules for this model are not shipped by default; you must separately order either two AIR OUT (AFO) labeled or two AIR IN (AFI) labeled fan modules.

Power supplies for this model are not shipped by default; you must separately order either AC power supplies or DC power supplies.

4-port 10-Gigabit Ethernet SFP+ uplink module

You can use the QSFP+ ports as network ports or as Virtual Chassis ports (VCPs) to connect the switch in a Virtual Chassis or a VCF. By default, the built-in QSFP+ ports are configured as VCPs. You can also use the uplink module ports to connect members of a Virtual Chassis or a VCF across multiple wiring closets by configuring the ports as VCPs. For more information about Virtual Chassis, see EX Series Virtual Chassis Overview. For more information about VCFs, see Virtual Chassis Fabric Overview.

32-Port EX4300 Switches

The 32-port EX4300 switches—EX4300-32F and EX4300-32F-DC—provide 32 built-in 1-Gigabit Ethernet small form-factor pluggable (SFP) network ports that can house SFP transceivers, four built-in 10-Gigabit Ethernet small form-factor pluggable plus (SFP+) ports that can house SFP+ and SFP transceivers, and two built-in quad small form-factor pluggable plus (QSFP+) ports that can house 40-Gigabit QSFP+ transceivers. They support power supply and fan module with front-to-back airflow direction and have a slot for installing an optional uplink module—a 2-port 40-Gigabit Ethernet QSFP+ uplink module that can house two QSFP+ transceivers or an 8-port 10-Gigabit Ethernet SFP+ uplink module that can house eight SFP+ transceivers, eight SFP transceivers, or a combination of eight SFP+ and SFP transceivers.

Figure 3 shows the front panel of a 32-port EX4300 switch.

Figure 3: Front Panel of a 32-Port EX4300 Switch

Front Panel of a 32-Port
EX4300 Switch

Figure 4 shows the rear panel of a 32-port EX4300 switch.

Figure 4: Rear Panel of a 32-Port EX4300 Switch

Rear Panel of a 32-Port EX4300
Switch

Table 2 lists the 32-port EX4300 switch models and their components.

Table 2: Components in 32-Port EX4300 Switches

Switch Models

Built-In Ports

Number of PoE-enabled Ports

Fan Modules

Power Supply Shipped by Default

Supported Uplink Modules

EX4300-32F

32 SFP ports, four SFP+ ports, and two QSFP+ ports

0

Two fan modules; each with an AIR OUT (AFO) label.

A 350 W AC power supply with the AIR OUT (AFO) label.

2-port 40-Gigabit Ethernet QSFP+ uplink module and 8-port 10-Gigabit Ethernet SFP+ uplink module

EX4300-32F-S

32 SFP ports, four SFP+ ports, and two QSFP+ ports

0

Fan modules for this model are not shipped by default; you must separately order either two AIR OUT (AFO) labeled or two AIR IN (AFI) labeled fan modules.

Power supplies for this model are not shipped by default; you must separately order either AC power supplies or DC power supplies.

2-port 40-Gigabit Ethernet QSFP+ uplink module and 8-port 10-Gigabit Ethernet SFP+ uplink module

EX4300-32F-DC

32 SFP ports, four SFP+ ports, and two QSFP+ ports

0

Two fan modules; each with an AIR OUT (AFO) label.

A 550 W DC power supply with the AIR OUT (AFO) label.

2-port 40-Gigabit Ethernet QSFP+ uplink module and 8-port 10-Gigabit Ethernet SFP+ uplink module

You can use the built-in QSFP+ ports as network ports or as VCPs to connect the switch in a Virtual Chassis or a VCF. By default, the built-in QSFP+ ports are configured as VCPs. You can also use the uplink module ports to connect members of a Virtual Chassis or a VCF across multiple wiring closets by configuring these ports as VCPs. For more information about Virtual Chassis, see EX Series Virtual Chassis Overview. For more information about VCFs, see Virtual Chassis Fabric Overview.

48-Port EX4300 Switches

The 48-port EX4300 switches—EX4300-48T and EX4300-48P—provide 48 built-in 10/100/1000BASE-T Ethernet network ports, with or without PoE+ depending on the switch model, and four built-in quad small form-factor pluggable plus (QSFP+) ports that can house 40-Gigabit QSFP+ transceivers. All network ports in the EX4300-48P switch are equipped for Power over Ethernet (PoE+), whereas EX4300-48T has no PoE+ ports. These switches support AC or DC power supply with different airflow directions. Each switch provides a slot for installing an optional 4-port 10-Gigabit Ethernet SFP+ uplink module, which has four SFP+ ports that can house four SFP+ transceivers, four SFP transceivers, or a combination of four SFP+ and SFP transceivers.

Figure 5 shows the front panel of a 48 port EX4300 switch.

Figure 5: Front Panel of a 48-Port EX4300 Switch

Front Panel of a 48-Port
EX4300 Switch

Figure 6 shows the rear panel of an 48-port EX4300 switch with power supplies and fan modules installed.

Figure 6: Rear Panel of a 48-Port EX4300 Switch

Rear Panel of a 48-Port EX4300
Switch

Table 3 lists the 48-port EX4300 switch models and their components.

Table 3: Components in 48-Port EX4300 Switches

Switch Models

Built-In Ports

Number of PoE-enabled Ports

Fan Modules

Power Supply Shipped by Default

Supported Uplink Module

EX4300-48T

48 10/100/1000BASE-T Ethernet ports and four QSFP+ ports

0

Two fan modules; each with an AIR OUT (AFO) label.

A 350 W AC power supply with the AIR OUT (AFO) label.

4-port 10-Gigabit Ethernet SFP+ uplink module

EX4300-48T-S

48 10/100/1000BASE-T Ethernet ports and four QSFP+ ports

0

Fan modules for this model are not shipped by default; you must separately order either two AIR OUT (AFO) labeled or two AIR IN (AFI) labeled fan modules.

Power supplies for this model are not shipped by default; you must separately order either AC power supplies or DC power supplies.

4-port 10-Gigabit Ethernet SFP+ uplink module

EX4300-48T-AFI

48 10/100/1000BASE-T Ethernet ports and four QSFP+ ports

0

Two fan modules; each with an AIR IN (AFI) label.

A 350 W AC power supply with the AIR IN (AFI) label.

4-port 10-Gigabit Ethernet SFP+ uplink module

EX4300-48T-DC

48 10/100/1000BASE-T Ethernet ports and four QSFP+ ports

0

Two fan modules; each with an AIR OUT (AFO) label.

A 550 W DC power supply with the AIR OUT (AFO) label.

4-port 10-Gigabit Ethernet SFP+ uplink module

EX4300-48T
-DC-AFI

48 10/100/1000BASE-T Ethernet ports and four QSFP+ ports

0

Two fan modules; each with an AIR IN (AFI) label.

A 550 W DC power supply with the AIR IN (AFI) label.

4-port 10-Gigabit Ethernet SFP+ uplink module

EX4300-48P

48 10/100/1000BASE-T Ethernet ports and four QSFP+ ports

48

Two fan modules; each with an AIR OUT (AFO) label.

A 1100 W AC power supply with the AIR OUT (AFO) label.

4-port 10-Gigabit Ethernet SFP+ uplink module

EX4300-48P-S

48 10/100/1000BASE-T Ethernet ports and four QSFP+ ports

48

Fan modules for this model are not shipped by default; you must separately order either two AIR OUT (AFO) labeled or two AIR IN (AFI) labeled fan modules.

Power supplies for this model are not shipped by default; you must separately order either AC power supplies or DC power supplies.

4-port 10-Gigabit Ethernet SFP+ uplink module

You can use the QSFP+ ports as network ports or as VCPs to connect the switch in a Virtual Chassis or a VCF. By default, the built-in QSFP+ ports are configured as VCPs. You can also use the uplink module ports to connect members of a Virtual Chassis or a VCF across multiple wiring closets by configuring these ports as VCPs. For more information about Virtual Chassis, see EX Series Virtual Chassis Overview. For more information about VCFs, see Virtual Chassis Fabric Overview.

Uplink Modules

EX4300 switches provide one slot for installing an optional uplink module. You can use the uplink module ports either to connect the switch to other devices or configure these ports as VCPs and use them to interconnect EX4300 switches to form a Virtual Chassis or a VCF configuration by using SFP+ transceivers.

Table 4 lists the uplink modules supported on 24-port and 48-port EX4300 switch models. Table 5 lists the uplink modules supported on 32-port EX4300 switch models.

Uplink Module

Description

Supported EX4300 Switch Models

First Junos OS Release

4-port 10-Gigabit Ethernet SFP+ uplink module

The 4-port SFP+ uplink module can house up to four SFP+ transceivers, SFP transceivers, or a combination of SFP+ and SFP transceivers. You can also configure ports on this module as VCPs and use them to connect the switch in a Virtual Chassis or a VCF configuration by using SFP+ transceivers.

  • EX4300-24T
  • EX4300-24P
  • EX4300-48T
  • EX4300-48T-AFI
  • EX4300-48P
  • EX4300-48T-DC
  • EX4300-48T-DC-AFI

13.2X50-D10

  • EX4300-24T-S
  • EX4300-24P-S
  • EX4300-48T-S
  • EX4300-48P-S

13.2X51-D26

Uplink Module

Description

Supported EX4300 Switch Models

First Junos OS Release

2-port 40-Gigabit Ethernet QSFP+ uplink module

The QSFP+ uplink module can house up to two QSFP+ transceivers. You can also configure the ports on this module as VCPs and use them to connect the switch in a Virtual Chassis or a VCF configuration.

  • EX4300-32F
  • EX4300-32F-DC

13.2X51-D15

  • EX4300-32F-S

13.2X51-D26

8-port 10-Gigabit Ethernet SFP+ uplink module

The 8-port SFP+ uplink module can house up to eight SFP+ transceivers, SFP transceivers, or a combination of SFP+ and SFP transceivers. You can also configure the ports on this module as VCPs and use them to connect the switch in a Virtual Chassis or a VCF configuration by using SFP+ transceivers.

  • EX4300-32F
  • EX4300-32F-DC

13.2X51-D15

  • EX4300-32F-S

13.2X51-D26

For more information about uplink modules, see Uplink Modules in EX4300 Switches.

Virtual Chassis

You can interconnect a maximum of 10 EX4300 switches to form a Virtual Chassis. You can operate these interconnected switches as a single, logical device with a single IP address.

You can use the following ports to configure an EX4300 switch in a Virtual Chassis:

  • For 24-port and 48-port EX4300 switches:
    • QSFP+ ports configured as VCPs
    • SFP+ uplink module ports configured as VCPs
  • For 32-port EX4300 switches:
    • QSFP+ ports (built-in) or QSFP+ uplink module ports configured as VCPs
    • SFP+ uplink module ports configured as VCPs

    Note: The four built-in SFP+ ports on 32-port EX4300 switches cannot be configured as VCPs.

By default, the built-in QSFP+ ports are configured as VCPs.

Power Supplies

EX4300 switches support AC or DC power supplies with different airflow directions. 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, and EX4300-48P-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, and EX4300-48P-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 6 lists the AC and DC power supplies used in EX4300 switches and the direction of airflow in them.

Table 6: Airflow Direction in Power Supplies for EX4300 Switches

Power Supply Rating

Label on Power Supply

Direction of Airflow

350 W AC

AIR IN (AFI)

Back-to-front—that is, air intake to cool the chassis is through the vents on the rear panel of the chassis and hot air exhausts through the vents on the front panel of the chassis.

350 W AC

AIR OUT (AFO)

Front-to-back—that is, air intake to cool the chassis is through the vents on the front panel of the chassis and hot air exhausts through the vents on the rear panel of the chassis.

550 W DC

AIR IN (AFI)

Back-to-front—that is, air intake to cool the chassis is through the vents on the rear panel of the chassis and hot air exhausts through the vents on the front panel of the chassis.

550 W DC

AIR OUT (AFO)

Front-to-back—that is, air intake to cool the chassis is through the vents on the front panel of the chassis and hot air exhausts through the vents on the rear panel of the chassis.

715 W AC

AIR OUT (AFO)

Front-to-back—that is, air intake to cool the chassis is through the vents on the front panel of the chassis and hot air exhausts through the vents on the rear panel of the chassis.

1100 W AC

AIR OUT (AFO)

Front-to-back—that is, air intake to cool the chassis is through the vents on the front panel of the chassis and hot air exhausts through the vents on the rear panel of the chassis.

For more information, see Cooling System and Airflow in an EX4300 Switch.

Caution: Do not mix:

  • AC and DC power supplies in the same chassis.
  • Power supplies with different airflow labels (AIR IN (AFI) and AIR OUT (AFO)) in the same chassis.
  • Fan modules with different airflow labels (AIR IN (AFI) and AIR OUT (AFO)) in the same chassis.
  • Power supplies and fan modules with different airflow labels (AIR IN (AFI) and AIR OUT (AFO)) in the same chassis.

Fan Modules

In the EX4300 switches the fan modules are hot-insertable and hot-removable field-replaceable units (FRUs).

All the EX4300 switch models, except EX4300-24T-S, EX4300-24P-S, EX4300-32F-S, EX4300-48T-S, and EX4300-48P-S switches are shipped with two fan modules preinstalled in the rear panel of the switch. EX4300-24T-S, EX4300-24P-S, EX4300-32F-S, EX4300-48T-S, and EX4300-48P-S switches are not shipped with preinstalled fan modules; you must order the fan modules separately.

The fan modules are available in two models that have different airflow directions—back-to-front airflow, indicated by the label AIR IN (AFI) and front-to-back airflow, indicated by the label AIR OUT (AFO). See Cooling System and Airflow in an EX4300 Switch.

Caution: Do not mix:

  • Fan modules with different airflow labels (AIR IN (AFI) and AIR OUT (AFO)) in the same chassis.
  • Power supplies with different airflow labels (AIR IN (AFI) and AIR OUT (AFO)) in the same chassis.
  • Fan modules and power supplies with different airflow labels (AIR IN (AFI) and AIR OUT (AFO)) in the same chassis.
  • AC and DC power supplies in the same chassis.

EX4300 Switch Components

Figure 7 shows the components on the front panel of a 24-port EX4300 switch (with an SFP+ uplink module installed).

Figure 7: Components on the Front Panel of a 24-Port EX4300 Switch

Components on the Front
Panel of a 24-Port EX4300 Switch
  1
Mini-USB console port
  5
LCD panel Enter button
  2
LCD panel
  6
SFP+ uplink module (optional)
  3
LCD panel Menu button
  7
Network ports
  4
Chassis status LEDs
 

Figure 8 shows the components on the front panel of a 32-port EX4300 switch.

Figure 8: Components on the Front Panel of a 32-Port EX4300 Switch

Components on the Front
Panel of a 32-Port EX4300 Switch
  1
Cover panel for uplink module slot
  5
Chassis status LEDs
  2
SFP network ports
  6
LCD panel Enter button
  3
LCD panel
  7
Mini-USB console port
  4
LCD panel Menu button
  8
SFP+ uplink ports

Figure 9 shows the components on the front panel of a 48-port EX4300 switch (with an SFP+ uplink module installed).

Figure 9: Components on the Front Panel of a 48-Port EX4300 Switch

Components on the Front
Panel of a 48-Port EX4300 Switch
  1
Mini-USB console port
  5
LCD panel Enter button
  2
LCD panel
  6
SFP+ uplink module (optional)
  3
LCD panel Menu button
  7
Network ports
  4
Chassis status LEDs
 

Figure 10 shows the components on the rear panel of a 24-port and 48-port EX4300 switch (with two AC power supplies and two fan modules installed).

Figure 10: Components on the Rear Panel of a 24-Port and 48-Port EX4300 Switch

Components on the Rear Panel
of a 24-Port and 48-Port EX4300 Switch
  1
Management port
  8
AC power supply in slot 1
  2
ESD point
  9
Power supply slot numbers
  3
Fan module in slot 0
10
Fan module slot numbers and LEDs
  4
Serial number label
11
QSFP+ port LEDs
  5
QSFP+ ports
12
USB port
  6
Fan module in slot 1
13
Console port
  7
AC power supply in slot 0
 

Note: DC power supplies are installed in the power supply slots in models that use DC power.

Figure 11 shows the components on the rear panel of a 32-port EX4300 switch (with two AC power supplies and two fan modules installed).

Figure 11: Components on the Rear Panel of a 32-Port EX4300 Switch

Components on the Rear Panel
of a 32-Port EX4300 Switch
  1
AC power supplies in slot 0 and slot 1
  7
USB port
  2
QSFP+ ports
  8
Fan module slot numbers and LEDs
  3
Fan modules in slot 0 and slot 1
  9
QSFP+ port LEDs
  4
ESD point
10
Serial number label
  5
Management port
11
Power supply slot numbers
  6
Console port
 

Note: DC power supplies are installed in the power supply slots in models that use DC power.

Note: The protective earthing terminal is located on the left side of the chassis. See Connecting Earth Ground to an EX Series Switch.

Modified: 2017-09-13