EX8216 Chassis

Chassis Physical Specifications of an EX8216 Switch

The EX8216 switch chassis is a rigid sheet-metal structure that houses the other switch components. Table 1 summarizes the physical specifications of the EX8216 switch.

Figure 1 shows the front of an EX8216 switch.

Figure 1: EX8216 Switch Front

Figure 2 shows the rear of an EX8216 switch.

Figure 2: EX8216 Switch Rear

You can mount an EX8216 switch on a standard 19-in. four-post rack or a standard 800-mm enclosed cabinet. Up to two EX8216 switches can be installed in a standard (42 rack unit (U)) rack provided that the rack can handle their combined weight.

Field-Replaceable Units in an EX8216 Switch

Field-replaceable units (FRUs) are switch components that you can replace at your site. The EX8216 FRUs are hot-insertable and hot-removable: You can remove and replace them without powering off the switch or disrupting the switching function.

Table 2 lists the FRUs for the EX8216 switch and actions to take before removing them.

Understanding EX8216 Switch Component and Functionality Redundancy

• Hardware Components That Provide Redundancy

• Routing Engine and Control Redundancy

• Switch Fabric Redundancy

Hardware Components That Provide Redundancy

The following hardware components provide redundancy to a Juniper Networks EX8216 Ethernet switch:

• Routing Engine (RE) modules—An EX8216 switch can have either one RE module or two RE modules. If two RE modules are installed, one RE module functions as the master and the other functions as the backup. If the master RE module fails or is removed, the backup module takes over as the master RE module.

  When the RE modules are configured for graceful switchover, the backup RE module automatically synchronizes its configuration and state with those of the master RE module. Any update to the master RE module is replicated on the backup RE module. If the backup module assumes mastership, packet forwarding continues through the switch.

• Power supplies—You can install up to six AC or six DC power supplies in an EX8216 switch. Each power supply connects to the midplane of the chassis, which distributes the output power produced by the power supplies to different switch components. (See Midplane in an EX8216 Switch.) Each power supply provides power to all the components in the switch.

  An N+1 power configuration is required for EX8200 switches. In an N+1 power configuration, if one power supply fails or is removed, the remaining power supplies continue to supply power for the entire system without interruption. If dual power feed redundancy is required, the required power configuration is N+N. The maximum internal power consumption for the EX8216 switch must be kept below 9000 W for a six power supply configuration (3+3) when 3000 W AC power supplies are used. The DC power supplies provide independent A and B power feeds so dual power redundancy is available even in an N+1 power configuration. See AC Power Supply in an EX8200 Switch and DC Power Supply in an EX8200 Switch.

• Cooling system—The cooling system in an EX8216 switch consists of two identical and interchangeable fan trays. Each fan tray has nine fans and two fan tray controllers.

  The fans in each fan tray are controlled by the two fan tray controllers. The fans are numbered 1 through 9. Fans 1 through 5 are controlled by the first fan tray controller. Fans 6 through 9 are controlled by the second fan tray controller. If one fan tray controller fails, the other fan tray controller keeps the remaining fans working. This allows the switch to continue to operate normally.

  Each fan tray continues to operate indefinitely and provide sufficient cooling even when a single fan fails provided the room temperature is within the operating range. See EX8216 Cooling System.

Routing Engine and Control Redundancy

Each RE module contains Routing Engine circuitry, and system control and management circuitry. An EX8216 switch can have one RE module or two RE modules. If a switch has two RE modules, one functions as the master while the other functions as a backup and is in standby mode. This provides the switch with full redundancy (1+1) for Routing Engine and system control functionality.

Table 3 lists the RE module slots in the EX8216 chassis and the Routing Engine and system control redundancy associated with different RE module combinations.

Switch Fabric Redundancy

The switch fabric circuitry in an EX8216 switch is distributed across eight Switch Fabric (SF) modules. We recommend that you install all eight SF modules in an EX8216 switch to support maximum midplane performance for the installed line cards.

All SF modules are fully connected to all installed line cards. When the switch is operational, all eight SF modules are simultaneously active. If a single SF module fails, the input/output traffic for that module is load-balanced among the remaining SF modules, providing graceful degradation in midplane performance. The impact of an SF module failure on the performance of an EX8216 switch varies based on the type of line cards installed in the switch and the traffic mix flowing through them. In an EX8216 switch configuration that is fully loaded with 8-port 10-Gigabit Ethernet SFP+ line cards, if one SF module fails, the remaining seven SF modules still have sufficient switching capacity to maintain continuous switch operation at full wire-rate performance.

Table 4 lists the SF module slots in an EX8216 chassis and shows that switch fabric redundancy is associated with both base and redundant switch configurations.

Slot Numbering for an EX8216 Switch

• Slot Numbering for RE Module Slots and Line Card Slots

• Slot Numbering for the Power Supply Slots

• Slot Numbering for the SF Module Slots

Slot Numbering for RE Module Slots and Line Card Slots

The slot labels for the RE module slots and the line card slots appear in two columns on each fan tray. The labels are identical on both fan trays, allowing you to use either fan tray in either fan tray slot. You read the slot labels based on the location of the fan trays. On the top fan tray, read the inner column of labels. On the bottom fan tray, read the outer column of labels. Table 5 lists the slot numbers on the EX8216 fan trays and the components those slots accept.

Figure 3 shows the slot numbering on the fan trays:

Figure 3: Slot Numbering on the Fan Trays on an EX8216 Switch Chassis Front

Slots RE0 and RE1 accept only the RE modules. Depending on the switch configuration you have purchased, you install either one or two RE modules. See Routing Engine (RE) Module in an EX8216 Switch.

Slots 0 through 15 accept one of the line cards available for EX8200 switches. See Installing a Line Card in an EX8200 Switch.

Slot Numbering for the Power Supply Slots

The chassis has six vertical slots on its front bottom. You can install up to six power supplies (either all AC or all DC) in these slots, which are labeled PSU 0 through PSU 5 from left to right. Table 6 lists the slot numbers for the power supplies on an EX8216 switch. See AC Power Supply in an EX8200 Switch and DC Power Supply in an EX8200 Switch.

Figure 4 shows the slot numbering for the power supply slots in an EX8216 switch.

Figure 4: Slot Numbering for Power Supply Slots on an EX8216 Switch Chassis Front

Slot Numbering for the SF Module Slots

Table 7 lists the slot numbers on the EX8216 chassis rear and the components those slots accept.

Figure 5 shows the slot numbering for the SF module slots, which are on the rear of the EX8216 switch chassis.

Figure 5: Slot Numbering for the SF Module Slots on an EX8216 Switch Chassis Rear

Slots SF7 through SF0 (from left to right) accept SF modules. See Switch Fabric (SF) Modules in an EX8216 Switch. We recommend you install all eight SF modules in an EX8216 switch for normal operation. See Installing an SF Module in an EX8216 Switch.

LCD Panel in an EX8200 Switch

The LCD panel on the top front of the EX8200 switch chassis shows two lines of text with a maximum of 16 characters in each line. The LCD panel displays a variety of information about the switch and provides menu options to perform basic operations such as initial configuration and switch reboot.

There are two navigation buttons—Menu and Enter—to the right of the LCD panel.

See Figure 6.

Figure 6: LCD Panel in an EX8200 Switch

You can configure the second line of the LCD panel to display a custom message. If the LCD panel is configured to display a custom message, the Menu button and the Enter button are disabled. See Configuring the LCD Panel on EX Series Switches (CLI Procedure).

The LCD panel has a backlight. If the LCD panel is idle for 60 seconds, the backlight turns off. You can turn on the backlight by pressing the Menu or Enter button once. After turning on the backlight, you can toggle between the LCD menus by pressing the Menu button and navigate through the menu options by pressing the Enter button.

Note

The chassis viewer in the J-Web interface also displays the LCD panel. From the J-Web interface, you can view real-time status information in the LCD panel. See Dashboard for EX Series Switches.

• LCD Panel Modes

• LCD Panel Menus

LCD Panel Modes

The LCD panel operates in four modes: boot, idle, status, and maintenance.

The LCD panel operates in boot mode during switch reboot.

The boot mode displays the key milestones in the switch boot process. The boot mode does not have any menu options. After the boot process is complete, the LCD panel automatically reverts to the Idle menu.

In the idle mode, line two of the Idle menu displays the Status LED modes of the network ports and the total number of alarms in the system. The number of alarms is updated every second.

The status mode allows you to get status information for the following items:

• Switch fabric in Switch Fabric and Routing Engine (SRE) modules in EX8208 switches

• Routing Engine (RE) and switch fabric in Switch Fabric (SF) module(s) in EX8216 switches

• Power supplies

• Fan tray(s) and chassis temperature

• Junos OS version installed

The maintenance mode allows you to cycle through options for configuring and troubleshooting the switch:

• System halt

• Reboot system

• Load rescue configuration

• Revert to factory configuration

• EZSetup

LCD Panel Menus

The LCD panel has three menus: Idle, Status, and Maintenance. In each of these menus, line one of the LCD panel displays the hostname of the switch. Toggle between the LCD menus by pressing the Menu button. Navigate through the menu options by pressing the Enter button.

Table 8 describes the LCD panel menu options.

You can view the information about the LCD panel in EX8200 switches by executing the command show chassis hardware. It shows the version, part number, serial number, and description of the LCD panel.

Midplane in an EX8216 Switch

The midplane is located in the center of the chassis and forms the rear of the line card cage. The Routing Engine (RE) modules, power supplies, fan trays, and line cards plug into the midplane from the front of the chassis. The Switch Fabric (SF) modules plug into the midplane from the rear of the chassis. The midplane contains an EEPROM that stores the serial number and revision level of the midplane.

The midplane performs the following functions:

• Power distribution—The midplane distributes power to all the switch components from the power supplies that plug into it.

• Control-signal connectivity—The midplane transports the control signals exchanged by system components for monitoring, control, and management purposes.

• Transfer of data between line cards and SF modules—The midplane provides connectivity for data traffic to and from the line cards and the SF modules.

Management Port LEDs in EX8200 Switches

The management port on EX8200 switches has two LEDs that indicate link/activity and port status (see Figure 7). The management port is set to full-duplex and the speed is set to 100 Mbps.

Figure 7: LEDs on the Management Port on an EX8200 Switch

Table 9 describes the Link/Activity LED.

Table 10 describes the Status LED (administrative status).

Chassis Status LEDs in an EX8200 Switch

The top front of the chassis of an EX8200 switch has three LEDs on the right side of the LCD panel.

See Figure 8.

Figure 8: Chassis Status LEDs

Table 11 describes the chassis status LEDs in an EX8200 switch, their colors and states, and the status they indicate. You can view the colors of the three LEDs remotely through the CLI by issuing the operational mode command show chassis lcd.

A major alarm (red) indicates a critical error condition that requires immediate action.

A minor alarm (yellow) indicates a noncritical condition that requires monitoring or maintenance. A minor alarm that is left unchecked might cause interruption in service or performance degradation.

All three LEDs can be lit simultaneously.

Network Port LEDs in an EX8200 Switch

Each network port on the faceplate of a line card has two LEDs. Figure 9 shows the network port LEDs on the line cards.

Figure 9: Network Port LEDs on Line Cards

The LEDs labeled Link/Activity in Figure 9 indicate link activity.

Table 12 describes the Link/Activity LED.

The LEDs labeled Status in Figure 9 indicate the status of one of the three port parameters. The port parameters are administrative status, speed, duplex mode, and Power over Ethernet (PoE) status.

Table 13 describes the Status LED. From the Idle menu of the LCD panel, use the Enter button on the LCD panel to toggle between the ADM, SPD, DPX, and POE indicators.