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EX9251 Chassis

 

Chassis Physical Specifications of an EX9251 Switch

The EX9251 switch chassis is a rigid sheet-metal structure that houses all components of the switch. EX9251 is available in two variants—with AC power supply and with DC power supply. Table 1 summarizes the physical specifications of the EX9251 switch chassis.

Table 1: Physical Specifications of the EX9251 Switch Chassis

Description

Weight

Width

Depth

Height

Chassis

22.7 lb (10.3 kg)

19 in. (48.26 cm)

  • 18.5 in. (47 cm)

  • 20.43 in. (51.89 cm) with fan tray and power supply handles

1.72 in. (4.37 cm)

Fan tray

0.29 lb (0.13 kg)

1.89 in. (4.8 cm)

5.78 in. (14.68 cm)

1.64 in. (4.17 cm)

AC power supply

2.2 lb (1 kg)

2.23 in. (5.66 cm)

14.5 in. (36.83 cm)

1.58 in. (4.01 cm)

DC power supply

2.2 lb (1 kg)

2.23 in. (5.66 cm)

14.53 in. (36.91 cm)

1.67 in. (4.24 cm)

You can mount an EX9251 switch on four posts of a 19-in. rack or an ETSI rack.

Field-Replaceable Units in an EX9251 Switch

Field-replaceable units (FRUs) are components that you can replace at your site. The FRUs in EX9251 switches are hot-removable and hot-insertable. You can remove and replace them without powering off the switch. The FRUs in EX9251 switches are:

  • Power supplies

  • Fan trays

  • Transceivers

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.

To install an AC power supply in an EX9251 switch, follow instructions in Installing an AC Power Supply in an EX9251 Switch. To remove an AC power supply from an EX9251 switch, follow instructions in Removing an AC Power Supply from an EX9251 Switch.

To install a DC power supply in an EX9251 switch, follow instructions in Installing a DC Power Supply in an EX9251 Switch. To remove a DC power supply from an EX9251 switch, follow instructions in Removing a DC Power Supply from an EX9251 Switch.

To install a fan tray in an EX9251 switch, follow instructions in Installing a Fan Tray in an EX9251 Switch. To remove a fan tray from an EX9251 switch, follow instructions in Removing a Fan Tray from an EX9251 Switch.

To install a transceiver in an EX9251 switch, follow instructions in Install a Transceiver or Install a QSFP28 Transceiver. To remove a transceiver from an EX9251 switch, follow instructions in Remove a Transceiver or Remove a QSFP28 Transceiver.

LEDs on the Front Panel of an EX9251 Switch

The four rate-selectable ports on the front panel of an EX9251 switch has four LEDs each, which indicate the link status and activity on the port. Figure 1 shows the LEDs on the rate-selectable ports. Table 2 describes the link activity LED on those ports.

Figure 1: LEDs on the Rate-selectable Ports
LEDs on
the Rate-selectable Ports
  1
LED0
  3
LED2
  2
LED1
  4
LED3

LED

Color/State

Port Speed

100G

40G

10G

LED 0

Green

A 100G module is plugged in, the port link is up, and there is no alarm or failure.

A 40G module is plugged in, the port link is up, and there is no alarm or failure.

A 10G module is plugged in, the port link is up, and there is no alarm or failure.

Red

The port link is down.

The port link is down.

The port link is down.

Amber

The interface is administratively disabled.

The interface is administratively disabled.

The interface is administratively disabled.

Off

No 100G module is plugged in.

No 40G module is plugged in.

No 10G module is plugged in.

LED 1

Green

Not applicable

Not applicable

A 10G module is plugged in, the port link is up, and there is no alarm or failure.

Red

Not applicable

Not applicable

The port link is down.

Amber

Not applicable

Not applicable

The interface is administratively disabled.

Off

Not applicable

Not applicable

No 10G module is plugged in.

LED 2

Green

Not applicable

Not applicable

A 10G module is plugged in, the port link is up, and there is no alarm or failure.

Red

Not applicable

Not applicable

The port link is down.

Amber

Not applicable

Not applicable

The interface is administratively disabled.

Off

Not applicable

Not applicable

No 10G module is plugged in.

LED 3

Green

Not applicable

Not applicable

A 10G module is plugged in, the port link is up, and there is no alarm or failure.

Red

Not applicable

Not applicable

The port link is down.

Amber

Not applicable

Not applicable

The interface is administratively disabled.

Off

Not applicable

Not applicable

No 10G module is plugged in.

The eight 10-Gigabit Ethernet SFP+ ports on the front panel of an EX9251 switch has one LED each, which indicate the link status and activity on the port. Figure 2 shows the LEDs on the SFP+ ports labeled 1/0, 1/2, 1/4, and 1/6. Figure 2 shows the LEDs on the SFP+ ports labeled 1/1, 1/3, 1/5, and 1/7. Table 3 describes those LEDs.

Figure 2: LEDs on the SFP+ Ports Labeled 1/0, 1/2, 1/4, and 1/6
LEDs on the SFP+
Ports Labeled 1/0, 1/2, 1/4, and 1/6
  1
LED on the port labeled 1/0
  3
LED on the port labeled 1/4
  2
LED on the port labeled 1/2
  4
LED on the port labeled 1/6
Figure 3: LEDs on the SFP+ Ports Labeled 1/1, 1/3, 1/5, and 1/7
LEDs on the SFP+
Ports Labeled 1/1, 1/3, 1/5, and 1/7
  1
LED on the port labeled 1/1
  3
LED on the port labeled 1/5
  2
LED on the port labeled 1/3
  4
LED on the port labeled 1/7

LED

Color/State

State and Description

Link activity

Green

The port link is up and there is no alarm or failure.

Red

The port link is down.

Off

The port is not enabled.

Figure 4 shows the LEDs on the management port and Figure 5 shows the LEDs on the BITS port. Table 4 describes the functions of the LEDs on the other ports on the front panel.

Figure 4: LEDs on the Management Port
LEDs on the Management Port
  1
Speed LED
  2
Link/Activity LED
Figure 5: LEDs on the BITS Port
LEDs on the BITS Port
  1
Activity LED
  2
Link LED

Table 4: Front Panel LEDs

LED

Color

State

Description

ONLINE

Green

On steadily

Both Junos OS and Linux are successfully loaded on the switch.

Blinking

The switch is starting Junos OS.

Red

On steadily

The switch has loaded Linux.

Blinking

The switch is starting Linux.

Off

The switch is offline.

OK/FAIL

Green

On steadily

The switch is functioning normally.

Red

Blinking

The switch has failed.

Off

The switch is not powered on.

ALM

Red

On steadily

Critical alarm—Indicates a critical condition that can cause the switch to stop functioning. Possible causes include component removal, failure, or overheating, or any major software failure.

Yellow

On steadily

Warning alarm—Indicates a serious but nonfatal error condition, such as a maintenance alert or a significant increase in component temperature.

Off

There is no alarm.

SSD0

Green

Blinking

SSD0 is being accessed by the switch.

Off

SSD0 is not active or not being accessed.

SSD1

Green

Blinking

SSD1 is being accessed by the switch.

Off

SSD1 is not active or not being accessed.

Link/Activity LED on the MGMT port

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.

Speed LED on the MGMT port

Green

On steadily

Link speed is 1000 Mbps.

Amber

On steadily

Link speed is 100 Mbps.

Off

Link speed is 10 Mbps.

Activity LED on the BITS port

Green

On steadily

There is no loss (BITS is in locked state).

Off

There is loss of signal or loss of line.

Link LED on the BITS port

Amber

On steadily

There is loss of signal or loss of line.

Off

There is no loss (BITS is in locked state).