EX9200 Host Subsystem

Switching and routing functionality, system management, and system control functions of an EX9200 switch are performed by host subsystem. A host subsystem consists of a Routing Engine functioning together with a Switch Fabric.

You can install either one or two host subsystems in the front panel of an EX9204 or an EX9208 switch. A base configuration EX9204 and EX9208 switch has one host subsystem. A redundant configuration EX9204 and EX9208 switch has a second host subsystem.

You can install either two or three host subsystems in the front panel of an EX9214 switch. A base configuration EX9214 switch has two host subsystems. A redundant configuration EX9214 switch has a third host subsystem.

Note:

In EX9204 and EX9208 switches, we recommend that you install two host subsystems for redundant protection. If you install only one host subsystem, we recommend that you install it in slot 0. In EX9214 switches, we recommend that you install three host subsystems for redundant protection. If you install only two host subsystems, we recommend that you install it in slot 0 and 1.

Each host subsystem has LEDs in the craft interface that display its status. See Craft Interface in an EX9200 Switch.

The Routing Engine module (RE module) is an Intel-based platform that runs Juniper Networks Junos operating system (Junos OS). Software processes that run on the RE module maintain the routing tables, manage the routing protocols used on the switch, control the router interfaces and some of the chassis components, and provide the interface for system management and user access to the switch.

In an EX9204, EX9208, or EX9214 switch, you can install one or two RE modules in the Switch Fabric modules (SF modules) that are installed in slots on the front panel of the switch. If you install two RE modules, one functions as the primary and the other functions as the backup. If the primary RE module fails or is removed and the backup is configured appropriately, the backup takes over as the primary. The backup RE module is hot-insertable and hot-removable, whereas the primary RE module is only hot-insertable. See Figure 1 and Figure 2. A USB port on the RE module accepts a USB memory card that loads the Junos OS.

Note:

• In EX9214 switches, you must install an RE module only in the SF modules installed in slots 7 and 8 labeled 0 and 1.

• If you have installed only one RE module, you must power off the switch before removing the RE module.

A base-configuration EX9204, EX9208, or EX9214 switch has only one RE module. See EX9204 Switch Configurations, EX9208 Switch Configurations, and EX9214 Switch Configurations. You can add a second RE module to the configuration for redundancy.

Note:

We recommend that you install two RE modules in EX9204, EX9208, and EX9214 switches for redundancy.

The RE module performs the following functions:

• Provides switching functionality to the switch through the switching plane

• Powers the line cards on and off

• Controls system resets and the boot sequence for the switch

• Monitors and controls the fan speed, power status for various chassis components, and craft interface LEDs

The switch ships with the RE modules preinstalled. There are two copies of the software:

• One copy on the solid-state drive (SSD) in the RE module.

• One copy on a USB flash drive that can be inserted into the slot on the RE module faceplate.

The RE module boots from the storage media in the following order: the USB device (if present), then the SSD, and finally the LAN.

Note:

Starting with Junos OS Release 17.1R1, EX9200 switches support the EX9200-RE2 module. The EX9200-RE2 module supports virtual machine (VM) architecture in an EX9200 switch. Only the EX9200-SF2 module supports the EX9200-RE2 module. Starting with Junos OS Release 17.1R1, you cannot form a Virtual Chassis using an EX9200 switch.

CAUTION:

The EX9200-RE module and the EX9200-RE2 module are not interoperable. Do not install both the RE modules in the same switch chassis.

Note:

Starting with Junos OS Release 16.1, you can use EX9200 switches as an aggregation device in Junos Fusion Enterprise. Starting with Junos OS Release 17.4, you can use EX9200 switches with EX9200-RE2 module installed in it as an aggregation device in Junos Fusion Enterprise. See Understanding Junos Fusion Enterprise Software and Hardware Requirements for the list of line cards that support this configuration.

Figure 1 shows the EX9200-RE module in an EX9200 switch.

Each EX9200-RE module consists of the following components:

• Extractor clips—Control the locking system to securely install and remove the EX9200-RE module.

• AUX port—Connects the EX9200-RE module to a modem or other auxiliary device.

• CONSOLE port—Connects the EX9200-RE module to a system console through a cable with an RJ-45 connector. See Connecting an EX9200 Switch to a Management Console or an Auxiliary Device.

• ETHERNET port—Connects the EX9200-RE module through an Ethernet connection to a management LAN (or any other device that plugs into an Ethernet connection) for out-of-band management. See Connecting an EX9200 Switch to a Network for Out-of-Band Management.

• USB port—Hosts a removable media interface through which you can install the Junos OS manually. See USB Port Specifications for an EX Series Switch.

• SATA SSD 1 and SATA SSD 2 slots—Host primary storage for software images, configuration files, and microcode. Also provide secondary storage for log files and memory dump files.

• RESET button—Reboots the EX9200-RE module when pressed.

• ONLINE/OFFLINE button—Turns the EX9200-RE module online or offline when pressed.

• Status LEDs—Indicate the status of the EX9200-RE module. Each EX9200-RE module has four LEDs labeled MASTER, STORAGE, ONLINE, and OK/FAIL on the faceplate.

• Captive screws—Secure the EX9200-RE module in place.

Figure 2 shows the EX9200-RE2 module in an EX9200 switch.

Each EX9200-RE2 module consists of the following components:

• Extractor clips—Control the locking system to securely install and remove the EX9200-RE2 module.

• AUX port—Connects the EX9200-RE2 module to a modem or other auxiliary device.

• CONSOLE port—Connects the EX9200-RE2 module to a system console through a cable with an RJ-45 connector. See Connecting an EX9200 Switch to a Management Console or an Auxiliary Device.

• MGMT port—Connects the EX9200-RE2 module through an Ethernet connection to a management LAN (or any other device that plugs into an Ethernet connection) for out-of-band management. See Connecting an EX9200 Switch to a Network for Out-of-Band Management.

• Status LEDs—Indicate the status of the EX9200-RE2 module. Each EX9200-RE2 module has five LEDs labeled MASTER, ONLINE, OK/FAIL, DISK1, and DISK2 on the faceplate.

• ONLINE/OFFLINE button—Turns the EX9200-RE2 module online or offline when pressed.

• USB1 and USB2 ports—Host a removable media interface using which you can install the Junos OS manually. See USB Port Specifications for an EX Series Switch.

• SSD 1 and SSD 2 slots—Host primary storage for software images, configuration files, and microcode. Also provide secondary storage for log files and memory dump files.

• RESET button—Reboots the EX9200-RE2 module when pressed.

• Captive screws—Secure the EX9200-RE2 module in place.

For the specifications of the Routing Engine modules, see Table 1.

Table 1: Routing Engine Module Specifications

RE Module	Processor	Memory	Connection to Packet Forwarding Engines	Disk	Media	First Junos OS Release
EX9200-RE	RE-S-EX9200-1800X4 (4 cores, 1.73 GHz)	16 GB	Gigabit Ethernet	32-  GB hard disk	4-  GB CompactFlash card	12.3R2
EX9200-RE2	RE-S-EX9200-2X00x6 (6 cores, 2 GHz)	64 GB	Gigabit Ethernet	50-  GB SSD X 2	No flash memory	17.1R1

Each Routing Engine module (RE module) has LEDs on the module faceplate. Table 2 describes the functions of these LEDs on the EX9200-RE and Table 3 describes the functions of these LEDs on the EX9200-RE2.

Table 2: LEDs on the EX9200-RE Routing Engine Module

LED Label	Status	State and Description
MASTER	Blue	RE module is functioning as the primary.
	Unlit	RE module is either functioning as the backup or not installed.
STORAGE	Green	Blinking—Indicates activity on the SSD.
ONLINE	Green	On steadily—RE module is operating normally. Blinking—RE module is coming online or going offline.
OK/FAIL	Red	RE module has failed.

Table 3: LEDs on the EX9200-RE2 Routing Engine Module

LED Label	Status	State and Description
MASTER	Blue	RE module is functioning as the primary.
	Unlit	RE module is either functioning as the backup or not installed.
ONLINE	Unlit	The RE is powered off
	Green	When the RE module is powering on: Blinking slowly (LED is lit for a period of time and is unlit for thrice that period of time that follows, and this pattern is repeated)—RE module is coming online. Blinking fast (LED is lit for a period of time and is unlit for the subsequent same period of time, and this pattern is repeated)—Linux is booted. On steadily (LED glows steadily)—Junos OS is booted. When the RE module is powering off: Blinking fast (LED is lit for a period of time and is unlit for the subsequent same period of time, and this pattern is repeated)—Junos OS is powering off. Blinking slowly (LED is lit for a period of time and is unlit for thrice that period of time that follows, and this pattern is repeated)—Linux is powering off. Unlit—RE module is powered off.
OK/FAIL	Red	RE module has failed.
DISK1	Green	Blinking—Indicates activity on the SSD.
DISK2	Green	Blinking—Indicates activity on the SSD.

The Switch Fabric serves as the central nonblocking matrix through which all network data passes.

Switch Fabric modules (SF modules) are installed horizontally on the front panel of the switch chassis. You can install either one or two SF modules in an EX9204 or EX9208 switch and two or three SF modules in an EX9214 switch. A base-configuration EX9204 or EX9208 switch has only one SF module, and a base-configuration EX9214 switch has two SF modules. See EX9204 Switch Configurations, EX9208 Switch Configurations, or EX9214 Switch Configurations.

In EX9204 and EX9208 switches, you can add a second SF module to the configuration for host subsystem redundancy. In EX9214 switches, you can add a third SF module to the configuration for host subsystem redundancy. If two SF modules are installed, one SF module functions as the primary and the other functions as the backup. If the primary SF module or its components fails or is removed, the backup module takes the role of primary.

The Routing Engine module (RE module) installs directly into a slot on the SF module. The Switch Fabric contains logic that determines which Routing Engine is the primary. The primary Routing Engine controls many internal functions of the SF module.

The backup SF module is hot-insertable and hot-removable, but the primary SF module is only hot-insertable.

The key functions of the Switch Fabric are:

• Monitor and control system functions

• Interconnection of all line cards

• Clocking, system resets, and booting control

• Routing Engine carrier

Figure 3 shows the original SF module, EX9200-SF.

Starting with Junos OS Release 14.1, a high-speed SF module, EX9200-SF2, is available. Compared to the original SF module, EX9200-SF, the EX9200-SF2 offers increased bandwidth, providing higher-capacity traffic support in settings that require greater interface density (slot and capacity scale).

The EX9200-SF2 supports all EX9200 line cards.

Figure 4 shows the high-speed SF module, EX9200-SF2.

The SF modules install horizontally into the front of the chassis. If any slots are empty, you must install a cover panel.

The SF module has the following components:

• Chassis management Ethernet switch

• I2C bus logic, used for low-level communication with each component

• Component redundancy circuitry

• Control Board/Routing Engine primary-role mechanism

• Gigabit Ethernet switch that is connected to the embedded CPU complex on all components

• Control field-programmable gate array (FPGA)—Provides the Peripheral Component Interconnect (PCI) interface to the Routing Engine

• 1000Base-T Ethernet controller—Provides a 1-Gbps Ethernet link between the Routing Engines

• Ethernet switch—Provides 1-Gbps link speeds between the Routing Engine and the line cards

• External clock interface—Allows BITS or GPS clock source input to the centralized timing circuit, or allows centralized timing to be output to BITS or GPS

• Circuits for chassis management and control

• Power circuits for the Routing Engine and the Switch Fabric

• SF module LEDs—Indicate system status. (See Switch Fabric Module LEDs in an EX9200 Switch).

• Ejector levers—Used for installing and removing the SF module

• Captive screws—Secure the SF module in place

The Switch Fabric module (SF module) has three LEDs on the module faceplate. Table 4 describes the functions of these LEDs. For information about the LEDs on the EX9200-SF3, see Table 4.

Table 4: SF Module LEDs of an EX9200 Switch

LED	Status	Description
FABRIC ACTIVE	Green	Switch Fabric is in active mode.
	Unlit	Switch Fabric is offline.
FABRIC ONLY	Green	On steadily—Switch Fabric is operating in fabric-only mode.
	Unlit	Switch Fabric is not operating in fabric-only mode.
OK/FAIL	Green	Switch Fabric is online.
	Red	Switch Fabric has failed.
	Unlit	Switch Fabric is offline.

The BITS, GPS, and UTI LEDs, located next to the EXT CLK port, indicate the status of the respective clocking interface. These LEDs are not supported.

Starting in Junos OS Release 20.3R1, the EX9200-SF3 Switch Fabric module is available. The EX9200-SF3 provides improved fabric performance and bandwidth capabilities for high-capacity line cards. In a redundant configuration, the EX9200-SF3 provides fabric bandwidth of up to 1 Tbps per slot. In a nonredundant configuration the EX9200-SF3 provides fabric bandwidth of up to 1 Tbps per slot (four fabric planes) and 1.5 Tbps per slot fabric bandwidth when all six fabric planes are used (with EX9200-15C line cards).

Figure 5 shows the SF module, EX9200-SF3.

The EX9200-SF3

Software release

Junos OS Release 20.3R1 and later Name in CLI: EX9200-SF3

• EX9200-SF3 Components and Features
• EX9200-SF3 LEDs
• EX9200-SF3 Fabric Bandwidth Performance and Redundancy
• EX9200-SF3 Maximum Power Consumption per Ambient Temperature and CB Slot
• Interoperability with Existing Hardware
• EX9200-SF3 Unsupported Functions and Capabilities from Legacy Switch Fabric Modules