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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.

Table 1: Physical Specifications of an EX8216 Switch

Description

Value

Chassis height

36.5 in. (92.7 cm)

Chassis width

  • 17.3 in. (43.9 cm)

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

Chassis depth

  • Chassis depth without any field-replaceable units (FRUs) installed is 26.5 in. (67.3 cm)

  • Chassis depth with FRUs installed is 29 in. (74 cm).

Weight

  • Chassis with midplane and cover panels: 160 lb (73 kg)

  • Base configuration: 270 lb (123 kg)

  • Redundant configuration: 278 lb (126 kg)

  • Fully loaded chassis: 486 lb (220 kg)

See EX8216 Switch Configurations.

Note: The fully loaded chassis weight includes the heaviest line cards in all 16 slots. If your switch configuration has lighter line cards, the fully loaded chassis weight will be in the 454–486 lb (206–220 kg) range.

Figure 1 shows the front of an EX8216 switch.

Figure 1: EX8216 Switch Front
EX8216 Switch Front
Note

Figure 1 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.

Figure 2 shows the rear of an EX8216 switch.

Figure 2: EX8216 Switch Rear
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.

Warning

Do not use the handles to lift the chassis manually. Failure to heed this warning can result in injury. See Mounting an EX8216 Switch on a Rack or Cabinet for instructions for lifting a chassis.

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.

Note

We recommend that you take some of these components offline before removing them from the switch. See Table 2 for details.

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

Table 2: FRUs in an EX8216 Switch

FRU

Action to Take Before Removing the Component

Power supplies (AC or DC)

None.

Fan trays

None.

Routing Engine (RE) module

Redundant configuration:

  • Master RE module—We recommend that you take it offline before removing it.

  • Backup RE module—We recommend that you take it offline before removing it.

Base configuration:

  • Single RE module—We recommend that you disable the switch by halting the RE module and thus take the RE module offline before removing it.

See Taking the RE Module Offline in an EX8216 Switch.

See EX8216 Switch Configurations.

Switch Fabric (SF) module

To avoid packet loss you must take the SF module offline before removing it. See Taking the SF Module Offline in an EX8216 Switch.

Line cards

Hot-insertable and hot-removable. We recommend that you take the line card offline before removing it. 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.

None.

Note

Line cards are not part of the base or redundant configurations. You must order them separately. See EX8216 Switch Configurations.

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.

Understanding EX8216 Switch Component and Functionality Redundancy

The Juniper Networks EX8216 Ethernet Switch is available as a fully redundant system. A redundant EX8216 switch configuration is designed so that no single point of failure can cause the entire switch to fail. See EX8216 Switch Configurations.

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.

Table 3: Routing Engine and System Control Redundancy for EX8216 Switches

Switch Configuration

Slot RE0

Slot RE1

Routing Engine and System Control Redundancy

Base configuration

RE module

Empty

No

Base configuration

Empty

RE module

No

Redundant configuration

RE module

RE module

Yes

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.

Table 4: Switch Fabric Redundancy for EX8216 Switches

Switch Configuration

Slots SF7 Through SF0

Switch Fabric Redundancy

Base configuration

SF modules installed in all slots

Yes

Redundant configuration

SF modules installed in all slots

Yes

Slot Numbering for an EX8216 Switch

An EX8216 chassis accepts 16 line cards, two Routing Engine (RE) modules, eight Switch Fabric (SF) modules, two fan trays, and six power supplies (AC or DC). All 16 slots for the line cards and the two slots for the RE modules run horizontally across the front of the chassis. The fan tray slots run vertically on the left of the chassis front. The six power supply slots run vertically across the front bottom of the chassis. The eight slots for the SF modules run vertically on the chassis rear.

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.

Table 5: Slot Numbering on the EX8216 Fan Trays

Outer Slot Label (Read for Bottom Fan Tray)

Inner Slot Label (Read for Top Fan Tray)

Components Accepted in Slot

7

RE0

  • RE module (adjacent to top fan tray)

  • Line card (adjacent to bottom fan tray)

8

RE1

  • RE module (adjacent to top fan tray)

  • Line card (adjacent to bottom fan tray)

9

0

Line card

10

1

Line card

11

2

Line card

12

3

Line card

13

4

Line card

14

5

Line card

15

6

Line card

Figure 3 shows the slot numbering on the fan trays:

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

Figure 3 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.

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.

Note

We recommend that you install two RE modules for redundancy. If you install only one RE module, we recommend that you install it in slot RE0. See Installing an 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.

Caution

Mixing different types of power supplies in the same chassis is not a supported configuration.

Table 6: Slot Numbering for Power Supply Slots on an EX8216 Switch Chassis Front

Slot Label

Components Accepted in Slot

PSU 0

Power supply

PSU 1

Power supply

PSU 2

Power supply

PSU 3

Power supply

PSU 4

Power supply

PSU 5

Power supply

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 Power Supply Slots on an EX8216 Switch Chassis Front
Note

Power supplies can be installed in any slot. You do not have to install them in serial order. See Installing an AC Power Supply in an EX8200 Switch and Installing a DC Power Supply in an EX8200 Switch.

Slot Numbering for the SF Module Slots

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

Table 7: Slot Numbering for the SF Modules on an EX8216 Switch Chassis Rear

Slot Label

Components Accepted in Slot

SF7

SF module

SF6

SF module

SF5

SF module

SF4

SF module

SF3

SF module

SF2

SF module

SF1

SF module

SF0

SF module

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
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
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

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.

Table 8: LCD Panel Menu Options for the EX8200 Switch

Menu

Description

Idle

In the Idle menu:

  • Press Enter to cycle through the Status LED modes, which are port status indicators:

    • ADM (enabled/disabled)

    • SPD (speed)

    • DPX (duplex)

    • POE (Power over Ethernet)

    See Network Port LEDs in an EX8200 Switch for information on the Status LED.

  • Press Menu to exit the Idle menu and go to the Status menu.

Status

The Status menu has the following options:

  • Switch fabric status—Choose one of the following:

    • Press Enter to display the status of the switch fabric in the SRE modules (SRE0 and SRE1) in EX8208 switches and the SF modules (SF) in EX8216 switches: OK, Fld (failed), ABS (absent)

    • Press Menu to go to the next option in the Status menu.

  • Power supply status (1)—Choose one of the following:

    • Press Enter to display the status of power supplies 0 and 1: OK, Fld, ABS.

    • Press Menu to go to the next option in the Status menu.

  • Power supply status (2)—Choose one of the following:

    • Press Enter to display the status of power supplies 2, 3, 4, and 5: OK, Fld, ABS.

    • Press Menu to go to the next option in the Status menu.

  • Environment status—Choose one of the following:

    • Press Enter to display the status of the fan tray(s) and the chassis temperature:

      • Fan tray(s) status: OK, Fld, ABS

      • Chassis temperature status: OK, High, Shutdown

    • Press Menu to go to the next option in the Status menu.

  • Junos OS version status—Choose one of the following:

    • Press Enter to display the version of Junos OS for EX Series switches loaded on the switch.

    • Press Menu to go to the next option in the Status menu.

  • EXIT STAT MENU?—Choose one of the following:

    • Press Enter to exit the Status menu.

    • Press Menu to return to the Switch fabric status option.

If you do not want users to use Status menu options, disable the entire menu or individual menu options. See Configuring the LCD Panel on EX Series Switches (CLI Procedure).

Maintenance

The Maintenance menu has the following options:

  • SYSTEM HALT?—Choose one of the following:

    • Press Enter to halt the master SRE module in an EX8208 switch or to halt the master RE module in an EX8216 switch. Press Enter again to confirm the halt.

      In a base configuration switch, the master SRE or RE module will be gracefully halted but not powered off. Press Enter on your management device or power cycle the switch to bring the switch back up.

      In a redundant configuration, the backup SRE or RE module takes over mastership when the master SRE or RE module is halted. To completely halt the switch, use the request system halt other-routing-engine CLI command to halt the backup SRE or RE module before halting the master SRE or RE module. Press Enter on your management device or power cycle the switch to bring the switch back up.

      See EX8208 Switch Configurations or EX8216 Switch Configurations for information on configuration types.

    • Press Menu to go to the next option in the Maintenance menu.

  • SYSTEM REBOOT?—Choose one of the following:

    • Press Enter to reboot the master SRE or RE module. Press Enter again to confirm the reboot.

    • Press Menu to go to the next option in the Maintenance menu.

  • LOAD RESCUE?—Choose one of the following:

    • Press Enter to roll back the switch to the previous valid configuration. Press Enter again to confirm the rollback.

    • Press Menu to go to the next option in the Maintenance menu.

  • FACTORY DEFAULT?—Choose one of the following:

    • Press Enter to restore the switch to the factory default configuration. Press Enter again to confirm the restoration. The LCD panel flashes a success or failure message and returns to the Idle menu.

    • Press Menu to go to the next option in the Maintenance menu.

  • ENTER EZSETUP?—Choose one of the following:

    • Press Enter to launch EZSetup. Press Enter again to confirm the launch.

      EZSetup configures DHCP and enables the J-Web user interface on the switch. The LCD panel flashes a success or failure message for approximately 10 seconds and returns to the Idle menu.

    • Press Menu to go to the next option in the Maintenance menu.

    Note: You can use the EZSetup option only if the switch is in the factory default configuration.

  • EXIT MAINT MENU?—Choose one of the following:

    • Press Enter to exit the Maintenance menu.

    • Press Menu to return to the SYSTEM HALT option.

If you do not want users to use Maintenance menu options, disable the entire menu or individual menu options. See Configuring the LCD Panel on EX Series Switches (CLI Procedure).

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.

Warning

High levels of electrical energy are distributed across the switch midplane. Do not touch the midplane connectors or any component connected to the midplane with any metallic object while you are servicing components installed in the switch.

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
LEDs on the Management
Port on an EX8200 Switch

Table 9 describes the Link/Activity LED.

Table 9: Link/Activity LED on the Management Port on EX8200 Switches

LED

Color

State and Description

Link/Activity

Green

  • Blinking—The port and the link are active, and there is link activity.

  • On steadily—The port and the link are active, but there is no link activity.

  • Off—The port is not active.

Table 10 describes the Status LED (administrative status).

Table 10: Status LED on the Management Port on EX8200 Switches

LED

Color

State and Description

Status

Green

  • On steadily—Administrative status is enabled.

  • Off—Administrative status is disabled.

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
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.

Table 11: Chassis Status LEDs in an EX8200 Switch

LED Label (Description)

Color

State and Description

ALM (Alarm)

Unlit

No alarm.

Red

Major alarm.

Yellow

Minor alarm.

SYS (System)

Unlit

Switch is powered off.

Yellow

One or more component failures are generating one or more alarms.

Green

Switch is operating normally.

MST (Master)

Unlit

Switch is powered off.

Green

Master Routing Engine is operational.

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
Network Port LEDs on
Line Cards

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

Table 12 describes the Link/Activity LED.

Table 12: Network Port LEDs on Line Cards in an EX8200 Switch—Link/Activity LED

LED

Color

State and Description

Link/Activity

Green

  • On steadily—The port and the link are active, but there is no link activity.

  • Blinking—The port and the link are active, and there is link activity.

  • Off—The port is not active.

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.

Table 13: Network Port LEDs on Line Cards in an EX8200 Switch—Status LED

LED

LCD Indicator

State, Color, and Description

Status

LED: ADM

Indicates the administrative status (enabled or disabled). The status indicators are:

  • Green—Administrative status enabled.

  • Yellow—The port is down.

  • Unlit—Administrative status disabled.

LED: SPD

Indicates the speed. The speed indicators are different in the line cards.

The speed indicators for 8-port SFP+ line cards are:

  • Unlit—Less than 10 Gbps

  • Green—10 Gbps

The speed indicators for 40-port SFP+ line cards are:

  • Unlit—10 Mbps

  • Green—Blinking—100 Mbps

  • Green—On steadily—1000 Mbps or 10 Gbps

The speed indicators for EX8200-2XS-40P line cards are:

  • Unlit—10 Mbps

  • Green—Blinking—100 Mbps

  • Green—On steadily—1000 Mbps or 10 Gbps

The speed indicators for EX8200-2XS-40T line cards are:

  • Unlit—10 Mbps

  • Green—Blinking—100 Mbps

  • Green—On steadily—1000 Mbps or 10 Gbps

The speed indicators for EX8200-48PL line cards are:

  • Unlit—10 Mbps

  • Green—Blinking—100 Mbps

  • Green—On steadily—1000 Mbps

The speed indicators for EX8200-48TL line cards are:

  • Unlit—10 Mbps

  • Green—Blinking—100 Mbps

  • Green—On steadily—1000 Mbps

The speed indicators for 48-port SFP line cards are:

  • Unlit—10 Mbps

  • Green—Blinking—100 Mbps

  • Green—On steadily—1000 Mbps

The speed indicators for 48-port RJ-45 line cards are:

  • Unlit—10 Mbps

  • Green—Blinking—100 Mbps

  • Green—On steadily—1000 Mbps

LED: DPX

Indicates the duplex mode. The status indicators are:

  • Green—Port is set to full-duplex mode.

  • Unlit—Port is not set to full-duplex mode.

LED: POE

Indicates the PoE mode. The status indicators are:

  • Green—PoE is enabled on the port and a device is drawing power.

  • Yellow—PoE is enabled on the port, but no power is drawn from the port.

  • Unlit—PoE is not enabled on the port.