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EX4650 Switches System Overview

EX4650 Switches Hardware Overview

Juniper Networks EX4650 Ethernet Switches provide connectivity for high-density environments, scalability for growing networks, and redundancy. The EX4650 provides the flexibility to support mixed 1-Gigabit Ethernet, 10-Gigabit Ethernet, 25-Gigabit Ethernet, 40-Gigabit Ethernet, and 100-Gigabit Ethernet environments.

You can interconnect EX4650 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 EX4650 as a distribution switch with virtual chassis capability, as a satellite device for Junos Fusion Enterprise, and as an aggregation switch.

The EX4650 switch is available as a fixed-configuration switch with the following built-in ports:

  • Forty-eight 25-Gigabit Ethernet ports that can operate at 1-Gbps, 10-Gbps, or 25-Gbps speed and support SFP, SFP+, or SFP28 transceivers.

  • Eight 100-Gigabit Ethernet ports that can operate at 40-Gbps or 100-Gbps speed and support QSFP+ or QSFP28 transceivers. When these ports operate at 40-Gbps speed, you can configure four 10-Gbps interfaces and connect breakout cables, increasing the total number of supported 10-Gbps ports to 80. When these ports operate at 100-Gbps speed, you can configure four 25-Gbps interfaces and connect breakout cables, increasing the total number of supported 25-Gbps ports to 80.

Four models are available: two featuring AC power supplies and front-to-back or back-to-front airflow and two featuring DC power supplies and front-to-back or back-to-front airflow.

Benefits of the EX4650 Switch

EVPN-VXLAN campus architecture—The EX4650 switch extends EVPN-VXLAN beyond the data center, thus providing customers the building blocks for an enterprise-wide fabric. The EVPN-VXLAN protocol is suitable for campus architectures because it provides Layer 3 transport with Layer 2 capabilities that allow enterprises to evolve, while also taking into consideration legacy applications. EX4650 also offers core aggregation capabilities aimed at enterprises with campus networks that want a compact and highly scalable solution.

Industry-leading 25-Gbps and 100-Gbps wire speeds: The EX4650 Switch offers industry-leading high density 25-Gbps and 100-Gbps wire speeds that support 48 ports at 100-Gbps or 48 ports at 25-Gbps, and 8 100-Gbps uplink ports.

Support for Virtual Chassis—EX4650 switches support virtual chassis technology. You can interconnect up to two or four QFX5120-48Y switches in a QFX5120-48Y virtual chassis.

Common data center protocols: Like the EX9000 series, the EX4650 also uses data center network protocols. The network protocols used in the EX4650 are the Ethernet VPN (EVPN) and the Virtual Extensible LAN (VXLAN). Engineers typically use it with the Border Gateway Protocol and the VXLAN encapsulation protocol which creates an overlay network on an existing Layer 3 infrastructure. As a result, the same engineering team can manage the data center and the campus.

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.

EX4650 Switch First View

The EX4650 switch has a 1 U form factor and is shipped with redundant fans (4+1) and redundant power supplies (1+1).

The EX4650 switch is a 25-Gigabit Ethernet enhanced small form-factor (SFP28) switch with 48 SFP28 ports and 8 100-Gbps quad small form-factor (QSFP28) pluggable ports. Each SFP28 port can operate as a native 25-Gigabit Ethernet port, 10-Gigabit Ethernet port, and can act as a 1-Gbps port based on the transceivers inserted. Each of the eight uplink ports can operate as either 100-G or 40-G based on the optics used. They can also be used as 25-Gbps ports or 10-Gbps ports using breakout cables or channelization.

CAUTION:

Do not install 1GbE copper transceivers (such as QFX-SFP-1GE-T) directly above or below another 1GbE copper transceiver. Use only the top row or bottom row to avoid damage to the device caused by some types of copper transceivers when the transceivers are installed above or below each other. However, if you are using copper transceivers with the OEM part number FCLF8521P2BTL-J1 printed on the transceiver label, you can install the transceivers in any port with no restrictions. For devices that support 10GbE copper transceivers, there is no similar restriction.

For more information on how to channelize interfaces on EX4650-48Y switches, see Channelizing Interfaces on EX4650-48Y Switches.

Figure 1 and Figure 2 show the front panel of an EX4650 switch.

Figure 1: Front Panel of an EX4650 SwitchFront Panel of an EX4650 Switch

Figure 2 shows the components on the front panel of an EX4650 switch.

Figure 2: Components on the Front Panel of an EX4650 SwitchComponents on the Front Panel of an EX4650 Switch
  1

SFP28 ports

  2

QSFP28 ports

Figure 3 shows the rear panel of an EX4650 Switch with AC power supplies.

Figure 3: Rear Panel of an AC-Powered EX4650 SwitchRear Panel of an AC-Powered EX4650 Switch

Figure 4 shows the rear view of an EX4650 Switch with DC power supplies.

Figure 4: Rear Panel of a DC-Powered EX4650 SwitchRear Panel of a DC-Powered EX4650 Switch

Figure 5 shows the components on the rear panel of an EX4650 Switch with AC power supplies.

Figure 5: Components on the Rear Panel of an AC-Powered EX4650 SwitchComponents on the Rear Panel of an AC-Powered EX4650 Switch
  1

Chassis status LEDs (ALM, SYS, MST, ID)

  7

Power Supply LEDs

  2

Console port

  8

Fan module LEDs

  3

RJ-45 management port (C1)

  9

RJ-45 management port (C0)

  4

ESD point

10

RESET button

  5

Fan module

11

USB port

  6

Power supplies

12

CLEI label

Figure 6 shows the components on the rear panel of an EX4650 with DC power supplies.

Figure 6: Components on the Rear Panel of a DC-Powered EX4650 SwitchComponents on the Rear Panel of a DC-Powered EX4650 Switch
  1

Chassis status LEDs (ALM, SYS, MST, ID)

  7

Power supply LEDs

  2

Console port

  8

Fan module LEDs

  3

RJ-45 management port (C1)

  9

RJ-45 management port (C0)

  4

ESD point

10

RESET button

  5

Fan module

11

USB port

  6

Power supplies

12

CLEI label

Table 1 lists the EX4650 switch models and their components.

Table 1: Components in EX4650 Switches

Switch Model

Built-in Ports

Fan Modules Shipped by Default

Power Supply Shipped by Default

EX4650-48Y-AFO

48x25G SFP28 ports and 8x100G QSFP28 ports

Five fan modules; each with an AFO label

Two 650 W AC power supplies (1+1 redundancy)

EX4650-48Y-AFI

48x25G SFP28 ports and 8x100G QSFP28 ports

Five fan modules; each with an AFI label

Two 650 W AC power supplies (1+1 redundancy)

EX4650-48Y-DC-AFO

48x25G SFP28 ports and 8x100G QSFP28 ports

Five fan modules; each with an AFO label

Two 650 W DC power supplies (1+1 redundancy)

EX4650-48Y-DC-AFI

48x25G SFP28 ports and 8x100G QSFP28 ports

Five fan modules; each with an AFI label

Two 650 W DC power supplies (1+1 redundancy)

Virtual Chassis

The EX4650 switch can be used as a member in an all EX4650 virtual chassis.

  • Starting with Junos OS Release 19.3R1, you can interconnect up to two EX4650 switches in an EX4650 Virtual Chassis. The two-member switches must be in the primary and backup routing engine roles.

  • Starting with Junos OS Release 20.1R1, you can interconnect up to four EX4650 switches in an EX4650 Virtual Chassis. You should configure two member switches into the primary and backup Routing Engine roles, and the remaining member switches into the linecard role.

    EX4650 switches can’t be combined with any other type of switches in a virtual chassis (mixed mode). EX4650 switches do not have dedicated or default-configured VCPs, but you can set any of the 40-Gbps QSFP+ or 100-Gbps QSFP28 uplink ports on the front panel (non-channelized ports 48 through 55) as VCPs. You can’t use any of the other ports (network ports 0 through 47) as VCPs. You can configure, monitor, and maintain it the same way as a EX Series virtual chassis. See the following topics for more details on how to configure and change the members in a EX4650 virtual chassis:

Power Supplies

Each EX4650 switch supports two AC or two DC power supplies with either front-to-back or back-to-front airflow. Power supplies for the EX4650 switch are fully redundant, load-sharing, and hot-removable and hot-insertable field-replaceable units (FRUs). The EX4650 switch models are shipped with two power supplies preinstalled in the rear panel of the chassis.

The power supplies either have labels on the handles that indicate the airflow direction or they have color-coded handles with a fan icon.An AFI label or a blue-colored handle indicates back-to-front airflow while anAFO label or a gold-colored handle indicates front-to-back airflow. See Figure 7

Figure 7: Power Supply Handle DetailPower Supply Handle Detail
  1

AFI label

 
CAUTION:

Do not mix:

  • AC and DC power supplies in the same chassis.

  • Power supplies with different airflow labels (AFI and AFO) in the same chassis.

  • Power supplies and fan modules with different airflow labels (AFI) and (AFO)) in the same chassis.

  • Verify that the airflow direction on the power supply handle matches the direction of airflow in the chassis. Ensure that each power supply you install in the chassis has the same airflow direction. If you install power supplies with two different airflow directions, Junos OS raises an alarm.

  • If you need to convert the airflow pattern on a chassis, you must replace all the fans and power supplies at one time to use the new direction.

Cooling System

EX4650 switches are shipped with five fan modules (4+1 redundancy) located at the rear of the chassis. These fan modules are designed for one of the two available airflow directions. The fan modules are also color-coded to indicate the airflow direction.

Figure 8 shows the EX4650 fan module.

Figure 8: EX4650 Fan ModuleEX4650 Fan Module

The five fan modules are numbered 0 through 4 counting from left to right. Each fan module slot has a fan icon and an LED next to it.

CAUTION:

Do not mix:

  • AC and DC power supplies in the same chassis.

  • Power supplies with different airflow labels (AFI and AFO) in the same chassis.

  • Power supplies and fan modules with different airflow labels (AFI) and (AFO)) in the same chassis.

EX4650 Switch Models

The EX4650 switch is available with 48 ports and supports AC and DC power supplies depending on the switch model. All models of the EX4650 ship with two power supplies and five fans installed by default. Table 2 lists the components shipped with EX4650 switch models.

Table 2: EX4650 Switch Models and Shipped Components

Switch Model

Ports

Power Supply

Airflow

EX4650-48Y-AFO

48 SFP28

8 QSFP28

AC

Front-to-back—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.

EX4650-48Y-AFI

48 SFP28

8 QSFP28

AC

Back-to-front—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.

EX4650-48Y-DC-AFO

48 SFP28

8 QSFP28

DC

Front-to-back—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.

EX4650-48Y-DC-AFI

48 SFP28

8 QSFP28

DC

Back-to-front—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.

CAUTION:

Mixing different types (AC and DC) of power supplies in the same chassis is not supported. Mixing different airflow modules in the same chassis is not supported.

Identifying EX4650 Switch Models

Purpose

Identify the model number of your EX4650 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:

  • EX4650-48Y-AFO

  • EX4650-48Y-AFI

  • EX4650-48Y-DC-AFO

  • EX4650-48Y-DC-AFI

In the sample output, the switch model is EX4650-48Y-AFO.

Meaning

In EX4650 switch model numbers:

  • The 48Y in the model number indicates that the number of network ports on the switch:

  • 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.

Chassis Physical Specifications for EX4650 Switches

The EX4650 switch chassis is a rigid sheet-metal structure that houses all components of the switch. Table 3 summarizes the physical specifications of the EX4650 switch chassis.

Table 3: Physical Specifications of the EX4650 Switch Chassis

Description

Value

Chassis height

1.72 in. (4.37 cm)

Chassis width

  • 17.36 in. (44.09 cm)

  • The outer edges of the front-mounting brackets extend the width to 19 in. (48.2 cm)

Chassis depth

20.48 in. (52.02 cm) excluding fan and power supply handles

Weight

23.69 lbs (10.75 kg) with two power supplies and fans installed

Field-Replaceable Units in EX4650 Switches

Field-replaceable units (FRUs) are components that you can replace at your site. The FRUs in EX4650 switches are hot-removable and hot-insertable – you can remove and replace them without powering off the switch. The FRUs in EX4650 switches are:

  • Power supplies

  • Fan modules

  • Transceivers

Note:

Transceivers are not part of the shipping configuration. If you want to purchase transceivers, you must order them separately.

Note:

If you have a Juniper J-Care service contract, register any addition, change, or upgrade of hardware components at https://www.juniper.net/customers/support/tools/updateinstallbase/. Failure to do so can result in significant delays if you need replacement parts. This note does not apply if you replace existing components with the same type of component.