EX8208 System Overview

 

EX8208 Switch Hardware Overview

Juniper Networks EX8208 Ethernet Switches provide high performance, scalable connectivity, and carrier-class reliability for high-density environments such as campus-aggregation and data-center networks. The EX8208 switch is a modular system that provides high availability and redundancy for all major hardware components, including Routing Engines, switch fabric, fan tray (redundant fans), and power supplies.

You can form an EX8200 Virtual Chassis by connecting individual EX8200 switches to an XRE200 External Routing Engine. A Virtual Chassis is multiple switches connected together that operate as a single network entity.

You can manage EX8208 switches using the same interfaces that you use for managing other devices running the Juniper Networks Junos operating system (Junos OS)—the command-line interface (CLI), the J-Web graphical interface, and the Network and Security Manager (NSM).

Benefits of the EX8208 Switch

Support for Virtual Chassis—EX8208 switches support Virtual Chassis technology. You can configure EX8200 switches in a Virtual Chassis and manage and operate them as a single network entity by using the XRE200 External Routing Engine.

High capacity—With a total capacity of up to 6.2 Terabits per second (Tbps), EX8208 is a powerful modular platform that delivers the performance, scalability, and high availability required for high-density data center, campus aggregation, and core switching environments.

Support for Juniper Networks Service Now solution—EX8200 switches support the Juniper Networks Service Now solution, a comprehensive set of tools that enable Juniper Networks J-Care Technical Service offerings to automate the delivery of tailored, proactive network intelligence and support services.

Software

The 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.

Chassis Physical Specifications, LCD Panel, and Backplane

The EX8208 switch is 14 rack units (14 U) in size (1/3 rack). Three EX8208 switches can fit in a standard 42 U rack. Each EX8208 switch is designed to optimize rack space and cabling. See Figure 1.

Figure 1: EX8208 Switch
EX8208 Switch

The EX8208 switch has a chassis-level LCD panel that displays Routing Engine and switch fabric status as well as chassis components’ alarm information for rapid problem identification. The LCD panel provides a user-friendly interface for performing initial switch configuration, rolling back a configuration, or restoring the switch to its default settings. See LCD Panel in an EX8200 Switch.

The EX8208 chassis backplane distributes the data, control, and management signals to various system components along with distributing power throughout the system.

See Chassis Physical Specifications of an EX8208 Switch.



Routing Engines and Switch Fabric

Switching functionality, system management, and system control functions of an EX8208 switch are performed by a Switch Fabric and Routing Engine (SRE) module. See Switch Fabric and Routing Engine (SRE) Module in an EX8208 Switch. An SRE module contains a Routing Engine and switch fabric. The SRE modules are field-replaceable units (FRUs) that are installed in the front of the chassis in the slots labeled SRE0 and SRE1. See Slot Numbering for an EX8208 Switch. A base configuration EX8208 switch has one SRE module. A redundant configuration EX8208 switch has a second SRE module. See EX8208 Switch Configurations.

The Switch Fabric (SF) module, working with the SRE module, provides the necessary switching functionality to a base configuration EX8208 switch. The SF module is installed in the front of the chassis in the slot labeled SF. In a redundant configuration, the SF module provides full 2+1 switch fabric redundancy to the switch. See Switch Fabric (SF) Module in an EX8208 Switch.

The EX8208 switch can also be connected to an XRE200 External Routing Engine. An XRE200 External Routing Engine is used to connect multiple EX8200 switches into a Virtual Chassis. See XRE200 External Routing Engine Hardware Overview.



Line Cards

The EX8208 switch features eight horizontal line card slots and supports line rate for each line card. The line cards in EX8200 switches combine a Packet Forwarding Engine and Ethernet interfaces on a single assembly. Line cards are FRUs that can be installed in the line card slots labeled 0 through 7 on the front of the switch chassis. See Slot Numbering for an EX8208 Switch. All line cards are hot-removable and hot-insertable.

Twelve line cards are available for EX8200 switches. The extra-scale line card models provide larger IPv4 and IPv6 route table sizes than the non-extra-scale models to store more unicast routes.

Table 1 shows the model numbers and descriptions of the line cards available for EX8200 switches.

Table 1: Line Cards Available for EX8200 Switches

Model

Description

Additional Information

EX8200-8XS

8-port SFP+ line card

8-port SFP+ Line Card in an EX8200 Switch

EX8200-8XS-ES

8-port SFP+ line card, extra-scale

8-port SFP+ Line Card in an EX8200 Switch

EX8200-40XS

40-port SFP+ line card

40-port SFP+ Line Card in an EX8200 Switch

EX8200-40XS-ES

40-port SFP+ line card, extra-scale

40-port SFP+ Line Card in an EX8200 Switch

EX8200-2XS-40P

40-port PoE+ with 4-port SFP and 2-port SFP+ line card

EX8200-2XS-40P Line Card

EX8200-2XS-40T

40-port RJ-45 with 4-port SFP and 2-port SFP+ line card

EX8200-2XS-40T Line Card

EX8200-48PL

48-port PoE+ 20 Gbps line card

EX8200-48PL Line Card

EX8200-48TL

48-port RJ-45 20 Gbps line card

EX8200-48TL Line Card

EX8200-48T

48-port RJ-45 line card

48-port RJ-45 Line Card in an EX8200 Switch

EX8200-48T-ES

48-port RJ-45 line card, extra-scale

48-port RJ-45 Line Card in an EX8200 Switch

EX8200-48F

48-port SFP line card

48-port SFP Line Card in an EX8200 Switch

EX8200-48F-ES

48-port SFP line card, extra-scale

48-port SFP Line Card in an EX8200 Switch

Note

We recommend that you do not install extra-scale line card models and non-extra-scale models in the same switch or Virtual Chassis. If you install extra-scale line cards in a switch or Virtual Chassis that has non-extra-scale models installed, the IPv4 and IPv6 route table sizes default to those of the non-extra-scale models and you will not get the benefit of the increased table sizes of the extra-scale models.

You will experience these decreased route table sizes in a Virtual Chassis even when the non-extra-scale line cards are installed in one member switch and the extra-scale line cards are installed in another member switch.



Cooling System

The cooling system in an EX8208 switch consists of a hot-removable and hot-insertable FRU fan tray. The fan tray contains 12 fans. The fan tray installs vertically on the left front of the chassis and provides side-to-side chassis cooling. See Cooling System and Airflow in an EX8208 Switch.



Power Supplies

Power supplies for the EX8208 switch are fully redundant, load-sharing, and hot-removable and hot-insertable (FRUs. Each EX8208 switch chassis can hold up to six AC or DC power supplies.

Table 2 shows the details of the power supplies available for EX8208 switches.

Table 2: Power Supplies Supported on EX8208 Switches

Power Supply

Input Voltage

Output Power

2000 W AC

Low-voltage line (100-120 VAC)

1200 W

High-voltage line (200-240 VAC)

2000 W

3000 W AC

Low-voltage line (100-120 VAC)

Not supported

High-voltage line (200-240 VAC)

3000 W

2000 W DC

-40 VDC through -72VDC

2000 W

Only two AC power supplies (provided) are required to power on the base AC configuration switch. The redundant AC configuration ships with six AC power supplies to provide the capacity to power the system using N+1 or N+N power redundancy. See AC Power Supply in an EX8200 Switch and EX8208 Switch Configurations.

The redundant DC configuration ships with four DC power supplies. The dual inputs of the DC supplies provide direct support for N+N power redundancy. The redundant configuration also provides sufficient capacity for N+1 redundancy in most configurations; if necessary, up to two additional DC supplies can be added to the system. See DC Power Supply in an EX8200 Switch and EX8208 Switch Configurations.

Caution

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

EX8208 Switch Configurations

Table 3 lists the seven sample hardware configurations for an EX8208 switch—base (AC), redundant (AC and DC versions), and fully loaded chassis (AC and DC versions)—and the components included in each configuration.

The switch is shipped in only four of these seven configurations: base (AC with 2000 W AC power supplies), base (AC with 3000 W AC power supplies), redundant (AC with 2000 W AC power supplies), and redundant (DC).

Table 3: EX8208 Switch Hardware Configurations

Switch Configuration

Configuration Components

Base configuration (AC with 2000 W AC power supplies)

  • Chassis with backplane

  • One fan tray

  • One Switch Fabric and Routing Engine (SRE) module

  • One Switch Fabric (SF) module

  • Two 2000 W AC power supplies

  • Two power cords

  • Eight line card cover panels

  • Four power supply cover panels

Base configuration (AC with 3000 W AC power supplies)

  • Chassis with backplane

  • One fan tray

  • One Switch Fabric and Routing Engine (SRE) module

  • One Switch Fabric (SF) module

  • Two 3000 W AC power supplies

  • Two power cords

  • Eight line card cover panels

  • Four power supply cover panels

Redundant configuration (AC with 2000 W AC power supplies)

  • Chassis with backplane

  • One fan tray

  • Two SRE modules

  • One SF module

  • Six 2000 W AC power supplies

  • Six power cords

  • Eight line card cover panels

Redundant configuration (DC)

  • Chassis with backplane

  • One fan tray

  • Two SRE modules

  • One SF module

  • Four 2000 W DC power supplies

  • 16 DC power cable lugs

  • Eight line card cover panels

Fully loaded chassis configuration (AC with 2000 W AC power supplies)

  • Chassis with backplane

  • One fan tray

  • Two SRE modules

  • One SF module

  • Six 2000 W AC power supplies

  • Six power cords

  • Eight line cards

Fully loaded chassis configuration (AC with 3000 W AC power supplies)

  • Chassis with backplane

  • One fan tray

  • Two SRE modules

  • One SF module

  • Six 3000 W AC power supplies

  • Six power cords

  • Eight line cards

Fully loaded chassis configuration (DC)

  • Chassis with backplane

  • One fan tray

  • Two SRE modules

  • One SF module

  • Six 2000 W DC power supplies

  • 24 DC power cable lugs

  • Eight line cards

Note

You can install up to eight line cards (any combination of line cards) in the switch.

Note

Line cards are not part of the base or redundant configuration. You must order them separately.

Note

If you want to purchase additional power supplies (AC or DC) for your switch configuration, you must order them separately.

EX8208 Switch Hardware and CLI Terminology Mapping

This topic describes the hardware terms used in EX8208 switch documentation and the corresponding terms used in the Junos OS command line interface (CLI). See Table 4.

Table 4: CLI Equivalents of Terms Used in Documentation for EX8208 Switches

Hardware Item (CLI)

Description (CLI)

Value (CLI)

Item In Documentation

Additional Information

Chassis

EX8208

Switch chassis

Chassis Physical Specifications of an EX8208 Switch

Backplane

EX8208-BP-S

Backplane

Backplane in an EX8208 Switch

CB (n)

One of the following:

  • EX8208-SRE320

  • EX8208-SF320

n is a value in the range of 0–2.

Multiple line items appear in the CLI if more than one control board (CB) is installed in the chassis.

The switch does not have actual control boards; see the following entries for the equivalent item on the switch:

 

CB0 and CB1 are always SRE modules.

Switch Fabric and Routing Engine (SRE) module

Switch Fabric and Routing Engine (SRE) Module in an EX8208 Switch

CB2 is always the SF module.

Switch Fabric (SF) module

Switch Fabric (SF) Module in an EX8208 Switch

FPC (n)

On EX8200 standalone switches:

Abbreviated name of the Flexible PIC Concentrator (FPC)

One of the following:

  • EX8200-8XS

  • EX8200-40F

  • EX8200-48F

  • EX8200-48T

n is a value in the range of 0–7. The value corresponds to the line card slot number in which the line card is installed.

Line card (The switch does not have actual FPCs–the line cards are the FPC equivalents on the switch.)

On EX8200 Virtual Chassis:

  • Slot number of the line card within the Virtual Chassis:

    • FPC 0-15

    • FPC 16-31

On Virtual Chassis member 0, n is a value in the range of 0–15 ; on member 1, n is a value in the range of 16–31.

Slot number of the line card within the Virtual Chassis

Xcvr (n)

Abbreviated name of the transceiver

n is a value equivalent to the number of the port in which the transceiver is installed.

Optical transceivers

Pluggable Transceivers Supported on EX8200 Switches

PSU (n)

One of the following:

  • EX8200-AC2K

  • EX8200-AC3K

  • EX8200-DC2K

n is a value in the range of 0–5. The value corresponds to the power supply slot number.

AC or DC power supply

Fan tray

EX8208-FT

Fan tray

Cooling System and Airflow in an EX8208 Switch

LCD (n)

EX8200 LCD

Value of n is always 0.

LCD panel

LCD Panel in an EX8200 Switch

Plane (n)

This field indicates:

  • State of the fabric plane:

    • Active

    • Spare

    • Check State

  • Status of the Packet Forwarding Engine (PFE) in each fabric plane:

    • Links OK

    • Error

n is a value in the range of 0–11.

Fabric plane

show chassis fabric plane

DPC (n)

n is a value in the range of 0–7.

The switch does not have actual Dense Port Concentrators (DPCs)–the line cards are the DPC equivalents on the switch.

show chassis fabric map

PIC (n)

Value of n is always 0.

Chassis Physical Specifications of an EX8208 Switch

The EX8208 switch chassis is a rigid sheet-metal structure that houses the other switch components. Table 5 summarizes the physical specifications of the EX8208 switch chassis. See Figure 2.

Table 5: Physical Specifications of the EX8208 Switch Chassis

Description

Value

Chassis height

24.25 in. (61.6 cm)

Chassis width

  • 17.25 in. (43.82 cm)

  • The outer edges of the front-mounting brackets extend the width to 19 in. (48.3 cm).

Chassis depth

  • 20 in. (50.8 cm)

  • The depth from the front-mounting bracket to chassis rear is 20.69 in. (52.6 cm).

Weight

  • Chassis with backplane: 89 lb (41 kg)

  • Base configuration: 149 lb (68 kg)

  • Redundant configuration: 187 lb (85 kg)

  • Fully loaded chassis: 284 lb (129 kg)

See EX8208 Switch Configurations.

Note: The fully loaded chassis weight includes the heaviest line cards in all eight slots. If your switch configuration has lighter line cards, the fully loaded chassis weight will be in the 268–284 lb (122–129 kg) range.

Figure 2: EX8208 Switch
EX8208 Switch
Note

Figure 2 shows line cards that have 2-in.-long ejector levers. An earlier version of 8-port SFP+ line card, 48-port RJ-45 line card, and 48-port SFP line card has 4-in.-long ejector levers.

You can mount an EX8200 switch on a standard 19-in. four-post rack or a standard 800-mm enclosed cabinet. Up to three EX8208 switches can be installed in a standard (42 rack unit (U)) rack provided the rack can handle their combined weight.

Lift handles are provided on either side of the switch to facilitate the handling of a chassis with only the backplane installed.

Warning

Do not use the lift handles to lift the chassis unless the chassis is empty (that is, contains only the backplane). Failure to heed this warning can result in injury. See Mounting an EX8208 Switch on a Rack or Cabinet Using a Mechanical Lift or Mounting an EX8208 Switch on a Rack or Cabinet Without Using a Mechanical Lift for instructions for moving a loaded chassis.

Field-Replaceable Units in an EX8208 Switch

Field-replaceable units (FRUs) are switch components that you can replace at your site. The switch uses these types of FRUs:

  • Hot-insertable and hot-removable—You can remove and replace these components without powering off the switch or disrupting the switching function.

  • Hot-pluggable—You can remove and replace these components without powering off the switch, but the switching function is interrupted until you replace the component.

Table 6 lists the FRUs for the EX8208 switch and their types.

Table 6: FRUs in an EX8208 Switch

FRU

Type

Power supplies

Hot-insertable and hot-removable.

Fan tray

Hot-insertable and hot-removable.

Switch Fabric and Routing Engine (SRE) module

Redundant configuration:

  • Master SRE module is hot-pluggable.

  • Backup SRE module is hot-insertable and hot-removable.

Base configuration:

See EX8208 Switch Configurations.

Switch Fabric (SF) module

Redundant configuration:

  • SF module is hot-insertable and hot-removable.

Base configuration:

See EX8208 Switch Configurations.

Line cards

Hot-insertable and hot-removable. We recommend that you take the line cards offline before removing them. See Removing a Line Card from an EX8200 Switch.

SFP and SFP+ transceivers

See Pluggable Transceivers Supported on EX8200 Switches for the Junos OS release in which the transceivers were introduced.

Hot-insertable and hot-removable.

Note

Line cards are not part of the base or redundant configuration. 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.