EX4300 System Overview

Benefits of the EX4300 Switch

Compact solution—The EX4300 switch is a modular single rack unit device that is an apt solution for crowded wiring closets and access switch locations such as data center, campus, and branch office environments. It provides carrier-class reliability of modular systems with the economics and flexibility of stackable platforms.

Support for Virtual Chassis—EX4300 switches support Virtual Chassis technology. You can interconnect up to 10 EX4300 switches to form a Virtual Chassis.

High availability—EX4300 switches provide high availability through redundant power supplies and fans, graceful Routing Engine switchover (GRES), and nonstop bridging and routing when deployed in a Virtual Chassis configuration.

Support for MACsec—EX4300 switches support IEEE 802.1AE MACsec, providing support for link-layer data confidentiality, data integrity, and data origin authentication. The MACsec feature enables EX4300 to support 88 Gbps of near line-rate hardware-based traffic encryption on all Gigabit Ethernet and 10 Gigabit Ethernet ports.

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
• 32-Port EX4300 Switches
• 48-Port EX4300 Switches

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 (model number: EX-UM-4X4SFP), 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 SFP+ and SFP transceivers in the four ports on the uplink module.

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

Figure 1: 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

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 (model number: EX-UM-4X4SFP)
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 order two fan modules labeled either AIR OUT (AFO) or AIR IN (AFI)separately.	Power supplies for this model are not shipped by default; you must order either AC power supplies or DC power supplies separately.	4-port 10-Gigabit Ethernet SFP+ uplink module (model number: EX-UM-4X4SFP)
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 (model number: EX-UM-4X4SFP)
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 order two fan modules labeled either AIR OUT (AFO) or AIR IN (AFI) separately.	Power supplies for this model are not shipped by default; you must order either AC power supplies or DC power supplies separately.	4-port 10-Gigabit Ethernet SFP+ uplink module (model number: EX-UM-4X4SFP)

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 Understanding EX Series Virtual Chassis. 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 (model number: EX-UM-2QSFP) that can house two QSFP+ transceivers or an 8-port 10-Gigabit Ethernet SFP+ uplink module (model number: EX-UM-8X8SFP) that can house eight SFP+ transceivers, eight SFP transceivers, or a combination of SFP and SFP+ transceivers in the eight ports on the uplink module.

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

Figure 3: 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

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 (model number: EX-UM-2QSFP) and 8-port 10-Gigabit Ethernet SFP+ uplink module (model number: EX-UM-8X8SFP)
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 order two fan modules labeled either AIR OUT (AFO) or AIR IN (AFI) separately.	Power supplies for this model are not shipped by default; you must order either AC power supplies or DC power supplies separately.	2-port 40-Gigabit Ethernet QSFP+ uplink module (model number: EX-UM-2QSFP) and 8-port 10-Gigabit Ethernet SFP+ uplink module (model number: EX-UM-8X8SFP)
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(model number: EX-UM-2QSFP) and 8-port 10-Gigabit Ethernet SFP+ uplink module (model number: EX-UM-8X8SFP)

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 Understanding EX Series Virtual Chassis. 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 (model number: EX-UM-4X4SFP), which has four SFP+ ports that can house four SFP+ transceivers, four SFP transceivers, or a combination of SFP and SFP+ transceivers in the four ports on the uplink module.

The 48-port EX4300 switches with multigigabit ports—EX4300-48MP and EX4300-48MP-S—provide 24 built-in 10/100/1000BASE-T Ethernet network ports, 24 built-in 100/1000/2500/5000/10000BASE-T Ethernet network ports, and four built-in Virtual Chassis Ports (VCPs) that house 40-Gbps quad small form-factor plus (QSFP+) transceivers. The 24 built-in 10/100/1000BASE-T Ethernet network ports support 10 Mbps, 100 Mbps, and 1 Gbps speeds. The 24 built-in 100/1000/2500/5000/10000BASE-T Ethernet network ports support 100 Mbps, 1 Gbps, 2.5 Gbps, 5 Gbps, and 10 Gbps speeds. All network ports are equipped for PoE+ and provide up to 95 watts of power. The four VCPs can be used to connect the switches to other devices in a Virtual Chassis configuration.

These switches support AC power supply with front-to-back airflow.

Each switch provides a slot for installing an optional 2-port 40-Gigabit Ethernet QSFP+/100-Gigabit Ethernet QSFP28 uplink module (model number: EX-UM-2QSFP-MR) or a 4-port 1-Gigabit Ethernet/10-Gigabit Ethernet SFP+ uplink module (model number: EX-UM-4SFPP-MR). The 2-port 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 5 shows the front panel of 48 port EX4300 switches except EX4300-48MP and EX4300-48MP-S switches. Figure 6 shows the front panel of EX4300-48MP and EX4300-48MP-S switches.

Figure 5: Front Panel of 48-Port EX4300 Switches Except EX4300-48MP and EX4300-48MP-S Switches

Figure 6: Front Panel of EX4300-48MP and EX4300-48MP-S Switches

Figure 7 shows the rear panel of 48-port EX4300 switches except EX4300-48MP and EX4300-48MP-S switches, with power supplies and fan modules installed. Figure 8 shows the rear panel of EX4300-48MP and EX4300-48MP-S switches, with power supplies and fan modules installed.

Figure 7: Rear Panel of 48-Port EX4300 Switches Except EX4300-48MP and EX4300-48MP-S Switches

Figure 8: Rear Panel of EX4300-48MP and EX4300-48MP-S Switches

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 Modules
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 (model number: EX-UM-4X4SFP)
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 order two fan modules labeled either AIR OUT (AFO) or AIR IN (AFI) separately	Power supplies for this model are not shipped by default; you must order either AC power supplies or DC power supplies separately.	4-port 10-Gigabit Ethernet SFP+ uplink module (model number: EX-UM-4X4SFP)
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 (model number: EX-UM-4X4SFP)
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 (model number: EX-UM-4X4SFP)
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 (model number: EX-UM-4X4SFP)
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 (model number: EX-UM-4X4SFP)
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 order two fan modules labeled either AIR OUT (AFO) or AIR IN (AFI) separately	Power supplies for this model are not shipped by default; you must order either AC power supplies or DC power supplies separately.	4-port 10-Gigabit Ethernet SFP+ uplink module (model number: EX-UM-4X4SFP)
EX4300-48MP	24 10/100/1000BASE-T Ethernet network ports, 24 100/1000/2500/5000/10000BASE-T Ethernet network ports, and four built-in QSFP+ ports that can house 40-Gigabit QSFP+ transceivers	48	Two fan modules; each with an AIR OUT (AFO) label.	A 1400 W AC power supply with the AIR OUT (AFO) label.	2-port 40-Gigabit Ethernet QSFP+/100-Gigabit Ethernet QSFP28 uplink module (model number: EX-UM-2QSFP-MR) or 4-port 1-Gigabit Ethernet/10-Gigabit Ethernet SFP+ uplink module (model number: EX-UM-4SFPP-MR) 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.
EX4300-48MP-S	24 10/100/1000BASE-T Ethernet network ports, 24 100/1000/2500/5000/10000BASE-T Ethernet network ports, and four built-in QSFP+ ports that can house 40-Gigabit QSFP+ transceivers	48	Fan modules for this model are not shipped by default; you must order two fan modules labeled AIR OUT (AFO) separately.	Power supplies for this model are not shipped by default; you must order AC power supplies separately.	2-port 40-Gigabit Ethernet QSFP+/100-Gigabit Ethernet QSFP28 uplink module (model number: EX-UM-2QSFP-MR) or 4-port 1-Gigabit Ethernet/10-Gigabit Ethernet SFP+ uplink module (model number: EX-UM-4SFPP-MR) 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.

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 Understanding EX Series Virtual Chassis. 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 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.

Table 4 lists the uplink modules supported on 24-port and 48-port EX4300 switches except EX4300-48MP and EX4300-48MP-S switches. Table 5 lists the uplink modules supported on 32-port EX4300 switch models. Table 6 lists the uplink module supported on EX4300-48MP and EX4300-48MP-S switches.

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 except EX4300-48MP and EX4300-48MP-S 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.

• 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 Understanding EX Series Virtual Chassis. For more information about VCFs, see Virtual Chassis Fabric Overview.

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 lists the AC and DC power supplies used in EX4300 switches and the direction of airflow in them.

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

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, EX4300-48P-S, and EX4300-48MP-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, EX4300-48P-S, and EX4300-48MP-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.

EX4300 Switch Components

Figure 9 shows the components on the front panel of a 24-port EX4300 switch (with an SFP+ uplink module installed).

Figure 9: 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 10 shows the components on the front panel of a 32-port EX4300 switch.

Figure 10: 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 11 shows the components on the front panel of a 48-port EX4300 switches except EX4300-48MP and EX4300-48MP-S switches (with an SFP+ uplink module installed).

Figure 11: Components on the Front Panel of 48-Port EX4300 Switches Except EX4300-48MP and EX4300-48MP-S Switches

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 12 shows the components on the front panel of EX4300-48MP and EX4300-48MP-S switches (with a 4-port 1-Gigabit Ethernet SFP/10-Gigabit Ethernet SFP+ uplink module installed).

Figure 12: Components on the Front Panel of EX4300-48MP and EX4300-48MP-S Switches

1 — QR code	5 — Factory Reset/Mode button
2 — Mini-USB console port	6 — 4-port 1-Gigabit Ethernet SFP/10-Gigabit Ethernet SFP+ uplink module (optional)
3 — Chassis status LEDs	7 — 100/1000/2500/5000/10000 Ethernet Network Ports
4 — Port status mode LEDs	8 — 10/100/1000BASE-T Ethernet Network Ports

Figure 13 shows the components on the rear panel of a 24-port and 48-port EX4300 switch except EX4300-48MP and EX4300-48MP-S switches (with two AC power supplies and two fan modules installed).

Figure 13: Components on the Rear Panel of a 24-Port and 48-Port EX4300 Switch Except EX4300-48MP and EX4300-48MP-S Switches

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

Figure 14 shows the components on the rear panel of a 32-port EX4300 switch (with two AC power supplies and two fan modules installed).

Figure 14: 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

Figure 15 shows the components on the rear panel of EX4300-48MP and EX4300-48MP-S switches (with one AC power supply and two fan modules installed).

Figure 15: Components on the Rear Panel of EX4300-48MP and EX4300-48MP-S Switches

1 — Management port	7 — Empty slot for AC power supply
2 — ESD point	8 — QSFP+ ports (dedicated Virtual Chassis ports)
3 — Fan module	9 — Console port
4 — Serial number label	10 — Reset button
5 — CLEI code label	11 — USB port
6 — AC power supply in slot 0

Purpose

Identify the model number of your EX4300 switch.

Action

Check the value of the FRU Model Number field in the Routing Engine section in the output of the show chassis hardware extensive CLI command.

user@switch> show chassis hardware extensive

The model number of your switch is one of the following:

• EX4300-24T

• EX4300-24P

• EX4300-32F

• EX4300-32F-DC

• EX4300-48T

• EX4300-48T-AFI

• EX4300-48T-DC

• EX4300-48T-DC-AFI

• EX4300-48P

In the sample output, the switch model is EX4300-48P.

Meaning

In EX4300 switch model numbers:

• The 24T, 24P, 32F, 48T, and 48P in the model number indicate the type of network ports on the switch:

  • 24T—The switch has 24 10/100/1000BASE-T Ethernet network ports.

  • 24P—The switch has 24 10/100/1000BASE-T Ethernet network ports with all ports equipped for Power over Ethernet (PoE+).

  • 32F—The switch has 32 1-Gigabit SFP network ports.

  • 48T—The switch has 48 10/100/1000BASE-T Ethernet network ports.

  • 48P—The switch has 48 10/100/1000BASE-T Ethernet network ports with all ports equipped for PoE+.

• AFI indicates that the switch is shipped with two fan modules and a power supply, each bearing an AIR IN (AFI) label. Switches that do not have AFI in their model numbers ship with two fan modules and a power supply, each bearing an AIR OUT (AFO) label.

  The labels on the fan modules and the power supplies indicate the direction of airflow they provide within the chassis when installed in the switch. AIR IN (AFI) labels indicate back-to-front airflow, and AIR OUT (AFO) labels indicate front-to-back airflow.

• The DC in the model number indicates that the switch model works on DC power supply. Switches that do not have DC in their model numbers work on AC power supply.