Juniper EX9251 Hardware Manual Download Page 155

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Troubleshooting EX9251 Components

IN THIS SECTION

Troubleshooting the Cooling System in an EX9251 Switch | 146

Troubleshooting Power Supplies in an EX9251 Switch | 147

Troubleshoot Temperature Alarms in EX Series Switches | 149

Troubleshooting the Cooling System in an EX9251 Switch

IN THIS SECTION

Problem | 146

Cause | 146

Solution | 146

Problem

Description

The fans in the fan trays are not functioning normally.

Cause

Solution

Follow these guidelines to troubleshoot the fans:

• Check the fan tray status LEDs and alarm LED.

146

Summary of Contents for EX9251

Page 1: ...EX9251 Switch Hardware Guide Published 2022 11 30 ...

Page 2: ...uide Copyright 2022 Juniper Networks Inc All rights reserved The information in this document is current as of the date on the title page YEAR 2000 NOTICE Juniper Networks hardware and software products are Year 2000 compliant Junos OS has no known time related limitations through the year 2038 However the NTP application is known to have some difficulty in the year 2036 END USER LICENSE AGREEMENT...

Page 3: ... Supplies in an EX9251 Switch 23 AC Power Cord Specifications for an EX9251 Switch 28 Power Requirements for EX9251 Switch Components 31 Power Supply Specifications for EX9251 Switches 32 2 Site Planning Preparation and Specifications Site Preparation Checklist for an EX9251 Switch 36 EX9251 Site Guidelines and Requirements 37 Environmental Requirements and Specifications for EX Series Switches 38...

Page 4: ...ront Panel in an EX9251 Switch 62 Grounding Cable and Lug Specifications for EX9251 Switches 62 USB Port Specifications for an EX Series Switch 64 Console Port Connector Pinout Information for an EX9251 Switch 64 RJ 45 to DB 9 Serial Port Adapter Pinout Information 66 RJ 45 Management Port Connector Pinout Information 66 3 Initial Installation and Configuration Unpacking and Mounting the EX9251 Sw...

Page 5: ...Install a Transceiver 105 Connect a Fiber Optic Cable 108 Configuring Junos OS on the EX9251 109 EX9251 Switch Default Configuration 109 Connecting and Configuring an EX9251 Switch CLI Procedure 110 4 Maintaining Components Routine Maintenance Procedures for EX9251 Switches 116 Routine Maintenance Procedures for EX9251 Switches 116 Maintaining the Routing Engine in EX9251 Switches 117 Maintaining ...

Page 6: ...plies in an EX9251 Switch 147 Troubleshoot Temperature Alarms in EX Series Switches 149 6 Contacting Customer Support and Returning the Chassis or Components Returning an EX9251 Chassis or Components 157 Returning an EX9251 Switch or Component for Repair or Replacement 157 Locating the Serial Number on an EX9251 Switch or Component 158 Locating the Serial Number ID Label on an EX9251 Switch Chassi...

Page 7: ...nd LED Safety Guidelines and Warnings 180 Maintenance and Operational Safety Guidelines and Warnings 183 General Electrical Safety Guidelines and Warnings 189 Action to Take After an Electrical Accident 190 Prevention of Electrostatic Discharge Damage 191 AC Power Electrical Safety Guidelines 192 AC Power Disconnection Warning 193 DC Power Electrical Safety Guidelines 194 DC Power Disconnection Wa...

Page 8: ...Agency Approvals for EX9251 Switches 202 Compliance Statements for EMC Requirements for EX Series Switches 204 Compliance Statements for Acoustic Noise for EX Series Switches 208 viii ...

Page 9: ...n routine maintenance and troubleshooting for the EX9251 switch After completing the installation and basic configuration procedures covered in this guide refer to the Junos OS documentation for information about further software configuration RELATED DOCUMENTATION EX9251 Switch Quick Start ix ...

Page 10: ...1 CHAPTER Overview EX9251 System Overview 2 EX9251 Chassis 9 EX9251 Cooling System 19 EX9251 Power System 23 ...

Page 11: ...is an Ethernet optimized switch that provides carrier class Ethernet switching It is a fixed configuration switch with a built in Routing Engine It has a throughput of up to 400 gigabits per second Gbps The switch has eight 10 Gigabit Ethernet ports and four rate selectable ports that you can configure as 100 Gigabit Ethernet ports or 40 Gigabit Ethernet ports each rate selectable port can be conf...

Page 12: ...y collapsing network layers Support for Junos Fusion Enterprise EX9251 switches support Junos Fusion Enterprise technology that enables a large number of devices deployed throughout a building to be managed as a single logical device thus reducing network complexity simplifying network management and lowering operational costs EX9251 Switch Models EX9251 switch is available in two models with AC p...

Page 13: ... second PPS connectors and 10 MHz timing connectors respectively one input and one output that connects the switch to external clock signal sources The clocking ports provide the synchronized output clocks from any one of the reference clock inputs based on the clock s priority 13 Time of day ToD port with LED ToD port that connects the switch to external timing signal sources 6 Online LED indicat...

Page 14: ...Supply 1 Fan trays 2 DC power supply units Routing Engine EX9251 switches have a single built in Routing Engine It provides switching protocol processes and software processes that control the switch s interface the chassis components system management and user access to the switch These switching processes run on top of a kernel that interacts with the Packet Forwarding Engine The Routing Engine ...

Page 15: ...ear panel of the chassis Each fan tray contains one counter rotating fan See EX9251 Cooling System on page 19 Component Redundancy A fully configured EX9251 switch is designed such that no single point of failure can cause the entire system to fail The following major hardware components are redundant Power supplies The switch supports two power supplies If one power supply fails in a fully config...

Page 16: ...on page 7 lists the models and the components included in each model Table 1 EX9251 Switch Models Switch Models Configuration Components First Junos OS Release EX9251 8X4C Chassis Three fan trays Two AC power supplies 18 1R1 EX9251 8X4C DC Chassis Three fan trays Two DC power supplies 18 1R1 EX9251 Switch Hardware and CLI Terminology Mapping This topic describes the hardware terms used in EX9251 s...

Page 17: ...e EX9251 Switch Hardware Overview on page 2 CB EX9251 0 Routing Engine EX9251 Switch Hardware Overview on page 2 FPC FPC 0 PIC n Abbreviated name of the Physical Interface Card PIC One of the following 4XQSFP28 PIC 8XSFPP PIC n is a value in the range 0 1 The value corresponds to the PIC slot number Xcvr n Abbreviated name of the transceiver n is a value equivalent to the number of the port in whi...

Page 18: ...lies in an EX9251 Switch on page 23 Fan tray n Fan Tray Front to Back Airflow AFO n is a value in the range 0 2 The value corresponds to the fan tray slot number Fan tray EX9251 Cooling System on page 19 Table 3 on page 9 lists the spare parts and blank panels available for the switch They must be ordered separately Table 3 Spare Parts and Blank Panels Model Number Description EX9251 CHAS EX9251 c...

Page 19: ...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 o...

Page 20: ...ing an AC Power Supply from an EX9251 Switch on page 123 To install a DC power supply in an EX9251 switch follow instructions in Installing a DC Power Supply in an EX9251 Switch on page 128 To remove a DC power supply from an EX9251 switch follow instructions in Removing a DC Power Supply from an EX9251 Switch on page 126 To install a fan tray in an EX9251 switch follow instructions in Installing ...

Page 21: ...on the Rate Selectable Ports 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 Th...

Page 22: ... 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 ap...

Page 23: ...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 5 on page 14 shows the LEDs on the SFP ports labeled 1 0 1 2 1 4 and 1 6 Figure 5 on page 14 shows the LEDs on the SFP ports labeled 1 1 1 3 1 5 and 1 7 Table 6 on page 15 describes those LEDs Figure 5 LEDs on the SFP Ports Labeled 1 0 1 2 1 4 and 1 6 1 ...

Page 24: ...rt 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 Table 6 Link Activity LED on the 10 Gigabit Ethernet SFP Ports 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 15 ...

Page 25: ...of the LEDs on the other ports on the front panel Figure 7 LEDs on the Management Port 1 Speed LED 2 Link Activity LED Figure 8 LEDs on the BITS Port 1 Activity LED 2 Link LED Table 7 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 16 ...

Page 26: ...failure or overheating or any major software failure Red Blinking Indicates that there is a major alarm and a minor alarm at the same time Major 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 Minor alarm Indicates a serious but nonfatal error condition such as a mainte...

Page 27: ...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...

Page 28: ...ee fan trays Under normal operating conditions the fans in the fan trays run at a moderate speed Temperature sensors inside the chassis monitor the temperature of the switch components If a fan fails or the ambient temperature rises above the acceptable range the system raises an alarm and the speed of the remaining fans is automatically adjusted to keep the temperature within the acceptable range...

Page 29: ... units FRUs The fan trays are installed on the rear panel of the chassis Each fan tray contains one counter rotating fan See Figure 9 on page 20 and Figure 10 on page 20 Figure 9 Fan Tray in an EX9251 Switch Figure 10 Faceplate of a Fan Tray in an EX9251 Switch 1 Screw 2 Latch 20 ...

Page 30: ...d hot air exhausts through the rear of the chassis See Figure 11 on page 21 Figure 11 Airflow Through the EX9251 Switch Chassis Cooling System in the Power Supplies The power supplies are self cooling units Each power supply has its own built in fan that cools the power supply The power supplies are installed on the rear panel of the switch The air exhaust for the power supplies are also located o...

Page 31: ...describes the behavior of the fan tray status LEDs Table 8 Fan Tray Status LEDs Color State Description Green Blinking Fan tray hardware initialization is complete and software initialization is pending On steadily Software initialization is complete and the fan is functioning normally Red On steadily Fan tray is faulty and not functioning normally Off Fan tray is not present RELATED DOCUMENTATION...

Page 32: ...itches is a hot insertable and hot removable field replaceable unit FRU You can install it without powering off the switch or disrupting the switching function The power supplies connect to the PEM board which distributes the different output voltages produced by the power supplies to the switch components depending on their voltage requirements When both the power supplies are present they share ...

Page 33: ...y Figure 13 on page 24 shows the power supply Each power supply requires a dedicated AC power feed and a dedicated customer site circuit breaker We recommend that you use a minimum 20 A 110 VAC or 16 A 220 VAC customer site circuit breaker or as required by local code WARNING The switch is pluggable type A equipment installed in a restricted access location It has a separate protective earthing te...

Page 34: ... the AC Power Cord Retainer Installed 1 Handle 4 Fault LED 2 Input status LED 5 Ejector lever 3 Output status LED 6 AC power cord retainer port Figure 15 on page 25 shows the LEDs and other components on an AC power supply with the AC power cord retainer installed Figure 15 LEDs and Other Components on an AC Power Supply With the AC Power Cord Retainer Installed 1 Handle 4 Fault LED 2 Input status...

Page 35: ... or the power supply fuse has failed If the AC OK LED is lit and the DC OK LED is unlit the AC power supply is installed properly but the power supply has an internal failure DC Power Supply Description Each DC power supply weighs approximately 2 2 lb 1 kg and has a handle an ejection lever a fan LEDs to monitor the status of the power supply and a terminal block that provides a single DC input 48...

Page 36: ...his separate protective earthing terminal must be permanently connected to earth Figure 16 DC Power Supply in an EX9251 Switch DC Power Supply LEDs and Other Components Figure 17 on page 27 shows the DC power supply status LEDs and other components on a DC power supply Figure 17 DC Power Supply LEDs and Other Components on a DC Power Supply 1 Input status LED 3 Fault LED 2 Output status LED 27 ...

Page 37: ...nlit Off Power supply output is off Green On steadily The power supply is sending out power correctly Fault Amber On steadily An error is detected in the power supply Replace the power supply as soon as possible To maintain proper airflow through the chassis leave the power supply installed in the chassis until you are ready to replace it AC Power Cord Specifications for an EX9251 Switch Each AC p...

Page 38: ... VAC 10 A 50 Hz NBR 14136 Type BR 3 CBL EX PWR C13 BR China 250 VAC 10 A 50 Hz GB 1002 1996 Type PRC 3 CBL EX PWR C13 CH Europe except Italy Switzerland and United Kingdom 250 VAC 10 A 50 Hz CEE 7 VII Type VIIG CBL EX PWR C13 EU India 250 VAC 10 A 50 Hz IS 1293 Type IND 3 CBL EX PWR C13 IN Israel 250 VAC 10 A 50 Hz SI 32 1971 Type IL 3G CBL EX PWR C13 IL Italy 250 VAC 10 A 50 Hz CEI 23 16 Type I 3...

Page 39: ...4 2 Type 12G CBL EX PWR C13 SZ Taiwan 125 VAC 11 A and 15 A 50 Hz NEMA 5 15P Type N5 15P CBL EX PWR C13 TW United Kingdom 250 VAC 10 A 50 Hz BS 1363 A Type BS89 13 CBL EX PWR C13 UK Figure 18 AC Plug Types WARNING The AC power cord for the switch is intended for use with the switch only and not for any other use WARNING Translation from Japanese The attached power cable is only for this product Do...

Page 40: ... SECTION Power Requirements for EX9251 Switch Components 31 Calculating System Thermal Output 32 Use the information in this topic to determine the power requirements for your switch Power Requirements for EX9251 Switch Components Table 12 on page 31 lists the power requirements for various hardware components when the switch is operating under typical and maximum voltage conditions Table 12 Power...

Page 41: ...figured chassis running at high activity 280 W 311 W Calculating System Thermal Output After you have calculated the power consumption for your configuration you can use that information to determine the system thermal output BTUs per hour To do so multiply the power consumption in watts by 3 41 For example in Table 13 on page 32 we calculated the power consumption for a fully configured chassis r...

Page 42: ... input power 312 W Table 16 on page 33 lists the AC power supply electrical specifications Table 16 AC Power Supply Electrical Specifications Item Specifications Maximum output power 650 W AC input voltage Operating range 100 through 127 VAC 200 through 240 VAC AC input line frequency 50 60 Hz nominal AC input current rating 7 8 A 100 VAC 3 8 A 240 VAC Table 17 on page 34 lists the DC power system...

Page 43: ... 20 A 44 VDC maximum DC system input power 331 W 7 75 A 44 VDC Table 18 on page 34 lists the DC power supply electrical specifications Table 18 DC Power Supply Electrical Specifications Item Specifications Maximum output power 650 W DC input voltage Minimum 44 VDC Nominal 48 VDC 60 VDC Operating range 44 to 72 VDC DC input current rating 20 A 44 VDC 34 ...

Page 44: ...reparation and Specifications Site Preparation Checklist for an EX9251 Switch 36 EX9251 Site Guidelines and Requirements 37 EX9251 Network Cable and Transceiver Planning 51 EX9251 Management Cable Specifications and Pinouts 61 ...

Page 45: ... for EX Series Switches on page 38 Power Measure distance between external power sources and switch installation site Calculate the power consumption and requirements Power Supply Specifications for EX9251 Switches on page 32 Power Requirements for EX9251 Switch Components on page 31 Calculating the Fiber Optic Cable Power Budget for EX Series Devices Calculating the Fiber Optic Cable Power Margin...

Page 46: ...quire cables and connectors Determine the number of cables needed based on your planned configuration Ensure that the distance between hardware components to be connected allows for cable lengths to be within the specified maximum limits Management Cable Specifications Specifications of Cables and Wires That Connect to Ports on the Front Panel in an EX9251 Switch on page 62 EX9251 Site Guidelines ...

Page 47: ... is too warm the switch might overheat leading to the switch temperature monitor shutting down the switch to protect the hardware components Table 20 on page 38 provides the required environmental conditions for normal switch operation Table 20 EX Series Switch Environmental Tolerances Switch or device Environment Tolerance Altitude Relative Humidity Temperature Seismic EX2200 C No performance deg...

Page 48: ...GR 63 Issue 4 EX2300 except EX2300 C switches No performance degradation up to 13 000 feet 3962 meters at 104 F 40 C as per GR 63 Normal operation ensured in the relative humidity range 10 through 85 noncondensing Normal operation ensured in the temperature range 32 F 0 C through 113 F 45 C Complies with Zone 4 earthquake requirements as per GR 63 Issue 4 EX3200 No performance degradation up to 10...

Page 49: ... The maximum thermal output for EX4300 48T is 423 BTU hour and for EX4300 48P is 5844 BTU hour EX4300 switches except the EX4300 48MP model No performance degradation up to 10 000 feet 3048 meters EX4300 48MP model No performance degradation up to 6 000 feet 1829 meters EX4300 switches except the EX4300 48MP model Normal operation ensured in the relative humidity range 10 through 85 noncondensing ...

Page 50: ...gh 104 F 40 C Complies with Zone 4 earthquake requirements as per GR 63 Issue 4 EX4600 No performance degradation to 6 562 feet 2000 meters Normal operation ensured in the relative humidity range 5 through 90 noncondensing Short term operation ensured in the relative humidity range 5 through 93 noncondensing NOTE As defined in NEBS GR 63 CORE Issue 4 short term events can be up to 96 hours in dura...

Page 51: ...rough 85 noncondensing Normal operation is ensured in the temperature range 32 F 0 C through 104 F 40 C Complies with Zone 4 earthquake requirements as per GR 63 Issue 4 EX8208 No performance degradation up to 10 000 feet 3048 meters Normal operation ensured in the relative humidity range 10 through 85 noncondensing Normal operation is ensured in the temperature range 32 F 0 C through 104 F 40 C C...

Page 52: ...rformance degradation up to 10 000 feet 3048 meters Normal operation ensured in the relative humidity range 5 through 90 noncondensing Normal operation is ensured in the temperature range 32 F 0 C through 104 F 40 C Nonoperating storage temperature in shipping container 40 F 40 C to 158 F 70 C Complies with Zone 4 earthquake requirements as per GR 63 EX9214 No performance degradation up to 10 000 ...

Page 53: ...nsured in the temperature range 41 F 5 C through 104 F 40 C Complies with Zone 4 earthquake requirements as per GR 63 Issue 4 NOTE Install EX Series switches only in restricted areas such as dedicated equipment rooms and equipment closets in accordance with Articles 110 16 110 17 and 110 18 of the National Electrical Code ANSI NFPA 70 General Site Guidelines Efficient device operation requires pro...

Page 54: ...tiliser des dispositifs de parasurtension Table 21 Site Electrical Wiring Guidelines Site Wiring Factor Guidelines Signaling limitations If your site experiences any of the following problems consult experts in electrical surge suppression and shielding Improperly installed wires cause radio frequency interference RFI Damage from lightning strikes occurs when wires exceed recommended distances or ...

Page 55: ...ert advice Strong sources of electromagnetic interference EMI can cause Destruction of the signal drivers and receivers in the device Electrical hazards as a result of power surges conducted over the lines into the equipment Clearance Requirements for Airflow and Hardware Maintenance for EX9251 Switches When planning the site for installing an EX9251 switch you must ensure sufficient clearance aro...

Page 56: ...ensure that the exhaust from other equipment does not blow into the intake vents of the chassis Leave at least 6 in 15 2 cm clearance in front of and behind the chassis for airflow Leave at least 6 in 15 2 cm clearance on the left of the chassis for installing the grounding lug Leave at least 24 in 61 cm clearance in front of and behind the switch for service personnel to remove and install hardwa...

Page 57: ... Chassis Rack and Cabinet Requirements for EX9251 Switches You can mount an EX9251 switch on four posts of a 19 in rack or an ETSI rack or in a cabinet that contains a 19 in rack or an ETSI rack Rack requirements consist of Rack type Mounting bracket hole spacing Rack size and strength Rack connection to the building structure Table 22 on page 49 provides the rack requirements and specifications 4...

Page 58: ...http www ecianow org or with the size and strength standards of an ETSI rack as defined in the European Telecommunications Standards Institute ETS 300 119 published by the European Telecommunications Standards Institute ETSI Ensure that the rack rails are spaced widely enough to accommodate the external dimensions of the device chassis The outer edges of the front mounting brackets extend the widt...

Page 59: ...ount the device in a cabinet ensure that ventilation through the cabinet is sufficient to prevent overheating Ensure adequate cool air supply to dissipate the thermal output of the device or devices Ensure that the hot air exhaust of the chassis exits the cabinet without recirculating into the device An open cabinet without a top or doors that employs hot air exhaust extraction from the top ensure...

Page 60: ...t of transceivers supported on EX9251 switches and information about those transceivers in the Hardware Compatibility Tool page for EX9251 NOTE We recommend that you use only optical transceivers and optical connectors purchased from Juniper Networks with your Juniper Networks device CAUTION The Juniper Networks Technical Assistance Center JTAC provides complete support for Juniper supplied optica...

Page 61: ...se transceivers by issuing the operational mode CLI command show interfaces diagnostics optics SEE ALSO Connecting the EX2300 to the Network Replacing a QSFP28 Transceiver on an SRX4600 Services Gateway Remove a Transceiver Replacing a QSFP28 Transceiver on an SRX4600 Services Gateway EX9251 Switch Hardware Overview 2 SFP Direct Attach Copper Cables for EX Series Switches IN THIS SECTION Cable Spe...

Page 62: ...sumption for example coherent ZR or ZR can potentially cause thermal damage to or reduce the lifespan of the host equipment Any damage to the host equipment due to the use of third party optical modules or cables is the users responsibility Juniper Networks will accept no liability for any damage caused due to such use Cable Specifications EX Series switches support SFP passive DAC cables The pass...

Page 63: ...y Tool page for EX4300 EX4400 Hardware Compatibility Tool page for EX4400 EX4500 Hardware Compatibility Tool page for EX4500 EX4550 Hardware Compatibility Tool page for EX4550 EX4600 Hardware Compatibility Tool page for EX4600 EX8208 Hardware Compatibility Tool page for EX8208 EX8216 Hardware Compatibility Tool page for EX8216 EX9251 Hardware Compatibility Tool page for EX9251 EX9253 Hardware Comp...

Page 64: ...e a problem running a Juniper device that uses third party optical modules or cables JTAC may help you diagnose host related issues if the observed issue is not in the opinion of JTAC related to the use of the third party optical modules or cables Your JTAC engineer will likely request that you check the third party optical module or cable and if required replace it with an equivalent Juniper qual...

Page 65: ...of these cables see EX3400 Hardware Compatibility Tool page for EX3400 EX4300 Hardware Compatibility Tool page for EX4300 EX4550 Hardware Compatibility Tool page for EX4550 EX4600 Hardware Compatibility Tool page for EX4600 EX9251 Hardware Compatibility Tool page for EX9251 EX9253 Hardware Compatibility Tool page for EX9253 Overview of EX Series Switches Fiber Optic Cable Signal Loss Attenuation a...

Page 66: ...avelength of light which travels in a straight line through the single mode fiber Compared to multimode fiber single mode fiber has a higher bandwidth and can carry signals for longer distances Single mode fiber is consequently more expensive than multimode fiber Exceeding the maximum transmission distances can result in significant signal loss which causes unreliable transmission Attenuation and ...

Page 67: ...vices To ensure that fiber optic connections have sufficient power for correct operation calculate the link s power budget when planning fiber optic cable layout and distances This planning helps you ensure that fiber optic connections have sufficient power for correct operation The power budget is the maximum amount of power the link can transmit When you calculate the power budget you use a wors...

Page 68: ...ient to operate the receiver and that it does not exceed the maximum receiver input power This means that the link will work A PM that is zero or negative indicates insufficient power to operate the receiver See the specification for your receiver to find the maximum receiver input power To calculate the worst case estimate for the power margin PM for the link 1 Determine the maximum value for lin...

Page 69: ...e CRM 1 dBm 1 dBm NOTE For information about the actual amount of signal loss caused by equipment and other factors see your vendor documentation for that equipment 2 Calculate the PM by subtracting LL from PB PB LL PM 13 dBm 0 5 dBm HOL 5 0 5 dBm 2 0 5 dBm 2 km 1 0 dBm km 1 dB CRM PM 13 dBm 0 5 dBm 2 5 dBm 1 dBm 2 dBm 1 dBm PM PM 6 dBm The calculated power margin is greater than zero indicating t...

Page 70: ...ut Information 66 RJ 45 Management Port Connector Pinout Information 66 Management Cable Specifications Table 25 on page 61 lists the specifications for the cables that connect the console and management ports to management devices Table 25 Specifications of Cables to Connect to Management Devices Ports Cable Specifications Receptacle Additional Information RJ 45 Console port CAT5e UTP unshielded ...

Page 71: ...port Table 26 Cable and Wire Specifications for Ports on the Front Panel Port Cable Specification Cable Wire Supplied Maximum Length Receptacle Console or auxiliary port RS 232 EIA 232 serial cable 1 83 m length with RJ 45 DB 9 connectors 1 83 m RJ 45 socket Management Ethernet port Category 5 cable or equivalent suitable for 100Base T operation One 4 57 m length with RJ 45 RJ 45 connectors 100 m ...

Page 72: ...ble with an incorrectly attached lug can damage the switch Grounding Points Specifications for an EX9251 Switch Two threaded holes are provided on the rear left side of the chassis for connecting the switch to earth ground The grounding points fit 10 32 screws and are spaced at 0 63 in 16 mm centers NOTE Additional grounding is provided to an AC powered switch when you plug its power supplies into...

Page 73: ...issues related to unsupported hardware We strongly recommend that you use only supported USB flash drives All USB flash drives used on EX Series switches must have the following features USB 2 0 or later Formatted with a FAT or MS DOS file system If the switch is running Junos OS Release 9 5 or earlier the formatting method must use a primary boot record Microsoft Windows formatting by default doe...

Page 74: ...d a USB to DB 9 plug adapter You must provide the USB to DB 9 plug adapter Table 28 EX9251 Switches Console Port Connector Pinout Information Pin Signal Description 1 RTS Request to send 2 DTR Data terminal ready 3 TxD Transmit data 4 Ground Signal ground 5 Ground Signal ground 6 RxD Receive data 7 DSR DCD Data set ready 8 CTS Clear to send SEE ALSO Connect a Device to a Management Console Using a...

Page 75: ...device use a combination of the RJ 45 to DB 9 socket adapter along with a USB to DB 9 plug adapter Table 29 on page 66 provides the pinout information for the RJ 45 to DB 9 serial port adapter Table 29 RJ 45 to DB 9 Serial Port Adapter Pinout Information RJ 45 pin Signal DB 9 pin Signal 1 RTS 8 CTS 2 DTR 6 DSR 3 TxD 2 RxD 4 GND 5 GND 6 RxD 3 TxD 7 DSR 4 DTR 8 CTS 7 RTS RJ 45 Management Port Connec...

Page 76: ...RP1 Transmit receive data pair 1 2 TRP1 Transmit receive data pair 1 3 TRP2 Transmit receive data pair 2 4 TRP3 Transmit receive data pair 3 5 TRP3 Transmit receive data pair 3 6 TRP2 Transmit receive data pair 2 7 TRP4 Transmit receive data pair 4 8 TRP4 Transmit receive data pair 4 67 ...

Page 77: ...ation and Configuration Unpacking and Mounting the EX9251 Switch 69 Connecting the EX9251 to Power 82 Connecting the EX9251 to External Devices 99 Connecting the EX9251 to the Network 105 Configuring Junos OS on the EX9251 109 ...

Page 78: ...pack the switches until you are ready to begin installation To unpack the switch 1 Move the shipping carton to a staging area as close to the installation site as possible but where you have enough room to remove the system components 2 Position the carton so that the arrows are pointing up 3 Open the top flaps on the shipping carton 4 Remove the accessory box and verify the contents against the p...

Page 79: ...ny part on the packing list is missing contact your customer service representative or contact Juniper customer care from within the U S or Canada by telephone at 1 888 314 5822 For international dial or direct dial options in countries without toll free numbers see https www juniper net support requesting support html Table 31 on page 70 lists the parts and their quantities in the packing list fo...

Page 80: ...e front mounting brackets and rear mounting brackets 8 10 32 screws to secure the ground cable lug 2 Ring lugs to connect to DC power source cables 2 AC power cord appropriate for your geographical location 1 Label Small Parts Enclosed 1 Label Accessories Contents 1 USB flash drive with Junos OS 1 Read me first document 1 Affidavit for T1 connection 1 Juniper Networks Product Warranty 1 End User L...

Page 81: ...tion base data if any addition or change to the installation base occurs or if the installation base is moved Juniper Networks is not responsible for not meeting the hardware replacement service level agreement for products that do not have registered serial numbers or accurate installation base data Register your product s at https tools juniper net svcreg SRegSerialNum jsp Update your installati...

Page 82: ...the switch by following instructions in Connecting and Configuring an EX9251 Switch CLI Procedure on page 110 6 Set the switch s management options by following the appropriate instructions Connect a Device to a Network for Out of Band Management Connect a Device to a Management Console Using an RJ 45 Connector SEE ALSO Rack and Cabinet Requirements for EX9251 Switches 48 Chassis and Component Lif...

Page 83: ...g carton see Unpacking an EX9251 Switch on page 69 WARNING Ensure that you understand how to prevent ESD damage Wrap and fasten one end of an ESD wrist strap around your bare wrist and connect the other end of the strap to the ESD point on the switch CAUTION If you are mounting multiple switches on a rack mount a switch in the bottom of the rack first and proceed to mount the rest of the switches ...

Page 84: ...brackets with the holes on the side panels of the switch chassis 4 Insert mounting screws into the aligned holes Tighten the screws by using the Phillips screwdriver number 2 5 Ensure that the other holes in the front mounting brackets are aligned with the holes in the side panels Insert a screw in each hole and tighten the screws by using the Phillips screwdriver number 2 6 Have one person grasp ...

Page 85: ... Switch on a Rack by Using Front Mounting Brackets 8 Ensure that the switch chassis is level by verifying that all screws on one side of the rack are aligned with the screws on the other side Figure 3 shows the switch mounted on a rack by using front mounting brackets Figure 25 An EX9251 Switch Mounted on Rack by Using Front Mounting Brackets 76 ...

Page 86: ...llips screwdriver number 2 11 Visually inspect the alignment of the chassis If the chassis is installed properly in the rack all the mounting screws on one side of the rack are aligned with the mounting screws on the opposite side and the switch is level Figure 5 shows the switch fully secured and installed on four posts of a rack Figure 27 EX9251 Mounted on Four Posts of a 19 in Rack Installing a...

Page 87: ...n ETSI rack 1 Position the switch in front of the rack 2 Align the front mounting brackets along the front panel of the switch chassis see Figure 29 on page 78 Figure 29 Attaching the Front Mounting Brackets to the Switch Chassis 3 Align the bottom holes in the front mounting brackets with the holes on the side panels of the switch chassis 4 Insert mounting screws into the aligned holes Tighten th...

Page 88: ... position it in the rack aligning the holes in the ETSI brackets attached to the front mounting brackets with the threaded holes in the rack posts Align the bottom hole in both the ETSI brackets with a hole in each rack post making sure the chassis is level 8 Have a second person secure the switch to the rack by using the appropriate screws Tighten the screws see Figure 31 on page 79 Figure 31 Mou...

Page 89: ...itch mounted on a rack by using ETSI brackets attached to the front mounting brackets Figure 32 An EX9251 Switch Mounted on an ETSI Rack by Using Front Mounting Brackets 10 Attach two ETSI brackets to the rear mounting brackets by using the M5 Pan Head screws with integrated washers see Figure 33 on page 80 Figure 33 Attaching ETSI Brackets to the Rear Mounting Brackets 80 ...

Page 90: ...ned to the holes in the rack post starting from the bottom Tighten the screws by using the Phillips screwdriver number 2 13 Visually inspect the alignment of the chassis If the chassis is installed properly in the rack all the mounting screws on one side of the rack are aligned with the mounting screws on the opposite side and the switch is level Figure 35 on page 81 shows the switch fully secured...

Page 91: ...ng terminal on the switch chassis to connect the switch to earth ground see Figure 37 on page 91 You must install the EX Series switch in a restricted access location and ensure that the chassis is always properly grounded EX Series switches have a two hole protective grounding terminal provided on the chassis See Table 33 on page 83 for the location of the earthing terminals on various EX Series ...

Page 92: ...h Ground Switch Earthing Terminal Location Grounding Cable Requirements Grounding Lug Specifications Screws and Washers Additional Information EX2200 Rear panel of the chassis 14 AWG 2 mm minimum 90 C wire or as permitted by the local code Panduit LCC10 14BWL or equivalent not provided Two 10 32 x 25 i n screws with 10 split lock washer not provided Two 10 flat washers not provided EX2300 C Rear p...

Page 93: ...00 24 MP and EX2300 48 MP models 14 10 AWG STR 2 5 6 mm 12 10 AWG SOL 4 6 mm minimum 90 C wire or as permitted by the local code not provided EX2300 switches except EX2300 24MP and EX2300 48MP models Panduit LCC10 14AW L or equivalent not provided EX2300 24MP and EX2300 48MP models Panduit LCA10 10L or equivalent not provided EX2300 switches except EX2300 24 MP and EX2300 48 MP models Two 10 32 x ...

Page 94: ...ee Special Instructions to Follow Before Connecting Earth Ground to an EX Series Switch on page 89 EX3400 Rear panel of the chassis 14 10 AWG STR 2 5 6 mm minimum 90 C wire or as permitted by the local code Panduit LCD10 10A L or equivalent not provided Two 10 32 x 25 i n screws with 10 split lock washer not provided Two 10 flat washers not provided EX4200 Left side of the chassis 14 AWG 2 mm mini...

Page 95: ...ovided Two 10 flat washers not provided EX4300 4 8MP and EX4300 4 8MP S switches Rear panel of the chassis 14 10 AWG STR 2 5 6 mm minimum 90 C wire or as permitted by the local code Panduit LCD10 14B L LCC10 BW L or equivalent not provided Two 10 32 x 25 in screws with 10 split lock washer not provided Two 10 flat washers not provided EX4500 and EX4550 Left side of the chassis 14 AWG 2 mm minimum ...

Page 96: ... lower left side The grounding cable must be the same gauge as the power feed cables and as permitted by the local code Panduit LCD2 14A Q or equivalent provided Two 20 x 0 5 in screws with split washer provided Two flat washers provided EX8208 Left side of the chassis 6 AWG 13 3 mm minimum 90 C wire or as permitted by the local code Panduit LCD2 14A Q or equivalent provided Two 20 x 0 5 in screws...

Page 97: ...e two protective earthing terminals 2 AWG 33 6 mm minimum 90 C wire or as permitted by the local code Panduit LCD2 14A Q or equivalent provided Two 20 x 0 5 in screws with split washer provided Two flat washers provided EX9204 EX9208 and EX9214 Rear panel of the chassis One 6 AWG 13 3 mm minimum 90 C wire or one that complies with the local code Thomas Betts LCN6 14 or equivalent provided Two 20 x...

Page 98: ...imum 90 C wire or one that complies with the local code not provided Panduit LCD10 14B L or equivalent provided Two M5 Pan Head screws provided Tools required for connecting an EX Series switch to earth ground An electrostatic discharge grounding strap provided A Phillips number 2 screwdriver to tighten the screws An AC powered EX Series switch gains additional grounding when you plug the power su...

Page 99: ... protective earthing terminal on switches mounted on four posts of a rack is accessible through the slot on the left rear bracket only if the rack is 27 5 in 69 85 cm through 30 5 in 77 47 cm deep for a switch mounted flush with the rack front and 29 5 in 74 93 cm through 32 5 in 82 55 cm deep for a switch mounted 2 in 5 08 cm recessed from the rack front See Figure 36 on page 90 Figure 36 Connect...

Page 100: ... strap to the ESD grounding point on the switch 4 Place the grounding lug attached to the grounding cable over the protective earthing terminal See Figure 37 on page 91 Figure 37 Connecting a Grounding Cable to an EX Series Switch 5 Secure the grounding lug to the protective earthing terminal with the washers and screws 6 Dress the grounding cable and ensure that it does not touch or block access ...

Page 101: ...tch and to power it on An ESD wrist strap Power cords appropriate for your geographical location provided See AC Power Cord Specifications for an EX9251 Switch on page 28 An external management device You can install up to two AC power supplies in an EX9251 switch The AC power supply in an EX9251 switch is a hot removable and hot insertable field replaceable unit FRU You can remove and replace it ...

Page 102: ...sh the end of the AC power cord retainer strip into the AC power cord retainer port see Figure 38 on page 93 next to the inlet on the power supply faceplate until it snaps into place Ensure that the loop in the retainer strip faces toward the power cord Figure 38 Power Cord Retainer Port on the AC Power Supply Faceplate 1 Handle 4 Fault LED 2 Input status LED 5 Ejector lever 3 Output status LED 6 ...

Page 103: ...N to the external management device 12 Turn on power to the external management device 13 Switch on the dedicated customer site circuit breakers for the power supply Follow the instructions for your site 14 If the AC power source outlet has a power switch set it to the on position NOTE After powering off a power supply wait at least five seconds before turning it back on After powering on a power ...

Page 104: ... ground CAUTION To meet safety and electromagnetic interference EMI requirements and to ensure proper operation you must connect EX9251 switches to earth ground before you connect them to power For installations that require a separate grounding conductor to the chassis use the protective earthing terminal on the switch chassis to connect to earth ground For instructions on connecting an EX9251 sw...

Page 105: ...rectly attached lug can damage the switch for example by causing a short circuit NOTE Each power supply input feed must be connected to a dedicated DC power source outlet To connect DC power to an EX9251 switch see Figure 42 on page 98 1 Switch off the dedicated customer site circuit breakers Ensure that the voltage across the DC power source cable leads is 0 V and that there is no chance that the...

Page 106: ...eat shrink tubing insulation around the power cables To install heat shrink tubing a Slide the tubing over the portion of the cable where it is attached to the lug barrel Ensure that tubing covers the end of the wire and the barrel of the lug attached to it b Shrink the tubing with a heat gun Ensure that you heat all sides of the tubing evenly so that it shrinks around the cable tightly Figure 41 ...

Page 107: ...nd a Phillips number 2 screwdriver Do not overtighten the screws Apply between 5 lb in 0 6 Nm and 6 lb in 0 7 Nm of torque to each screw see Figure 42 on page 98 When connecting DC power the proper wiring sequence is ground to ground then RTN to RTN and finally 48 V to 48 V Figure 42 Connect Power to a DC Powered Switch a Secure the positive DC source power cable lug to the return terminal labeled...

Page 108: ... supply and the show chassis command display to indicate that the power supply is functioning normally Ignore error indicators that appear during the first five seconds 13 If the power supply is installed correctly and functioning normally the input status LED labeled IN and output status LED labeled OUT on the power supply faceplate are on and steadily lit green and the alarm LED labeled is not l...

Page 109: ...ble with an RJ 45 connector Use the management port to connect the device to the management device To connect a device to a network for out of band management see Figure 44 on page 100 1 Connect one end of the Ethernet cable to the management port on the device 2 Connect the other end of the Ethernet cable to the management device Figure 44 Connect a Device to a Network for Out of Band Management ...

Page 110: ... You must provide the USB to DB 9 plug adapter You can configure and manage devices using a dedicated management channel Each device has a console port that you can connect to using an Ethernet cable with an RJ 45 connector Use the console port to connect the device to the console server or management console The console port accepts a cable that has an RJ 45 connector To connect the device to a m...

Page 111: ... to a Management Console Through a Console Server Figure 47 Connect a Device Directly to a Management Console Connecting the EX9251 Switch to External Clocking and Timing Devices IN THIS SECTION Connecting 1 PPS and 10 MHz Timing Devices to the Switch 103 Connecting a Time of Day Device to the Switch 104 Connecting a BITS External Clocking Device to the Switch 104 102 ...

Page 112: ...onnecting 1 PPS and 10 MHz Timing Devices to the Switch The switch has four SubMiniature B SMB connectors that support 1 PPS and 10 MHz timing devices NOTE Ensure that a cable of 3 m or less in length is used for the 10 MHz and 1 PPS connectors To connect the SMB coaxial cable to the external clocking input port 1 Connect one end of the SMB coaxial cable to either the 1 PPS SMB connector or the 10...

Page 113: ...he RJ 45 cable into the ToD timing device 4 Verify that the LEDs for the ToD port on the switch are lit steadily green 5 Configure the port Table 36 Time of Day Port on an EX9251 Switch Callout Label Description 3 See Figure 48 on page 103 ToD ToD RJ 45 port with LED Connecting a BITS External Clocking Device to the Switch The switch has an external building integrated timing supply BITS port labe...

Page 114: ...Connecting the EX9251 to the Network IN THIS SECTION Install a Transceiver 105 Connect a Fiber Optic Cable 108 Install a Transceiver Before you install a transceiver in a device ensure that you have taken the necessary precautions for safe handling of lasers see Laser and LED Safety Guidelines and Warnings Ensure that you have a rubber safety cap available to cover the transceiver The transceivers...

Page 115: ...ith an equivalent Juniper qualified component Use of third party optical modules with high power consumption for example coherent ZR or ZR can potentially cause thermal damage to or reduce the lifespan of the host equipment Any damage to the host equipment due to the use of third party optical modules or cables is the users responsibility Juniper Networks will accept no liability for any damage ca...

Page 116: ...til it is fully seated If you are installing a CFP transceiver hand tighten the captive screws on the transceiver 7 Remove the rubber safety cap from the transceiver and the end of the cable and insert the cable into the transceiver LASER WARNING Do not look directly into a fiber optic transceiver or into the ends of fiber optic cables Fiber optic transceivers and fiber optic cable connected to a ...

Page 117: ...e Before you connect a fiber optic cable to an optical transceiver installed in a device ensure that you have taken the necessary precautions for safe handling of lasers see Laser and LED Safety Guidelines and Warnings To connect a fiber optic cable to an optical transceiver installed in a device LASER WARNING Do not look directly into a fiber optic transceiver or into the ends of fiber optic cabl...

Page 118: ...adius An arc smaller than a few inches in diameter can damage the cables and cause problems that are difficult to diagnose Do not let fiber optic cables hang free from the connector Do not allow fastened loops of cables to dangle which stresses the cables at the fastening point Configuring Junos OS on the EX9251 IN THIS SECTION EX9251 Switch Default Configuration 109 Connecting and Configuring an ...

Page 119: ...commands interactive commands any commit factory settings Connecting and Configuring an EX9251 Switch CLI Procedure Before you begin connecting and configuring an EX9251 switch gather the following information Name the switch will use on the network Domain name the switch will use IP address and prefix length information for the Ethernet interface IP address of a default switch IP address of a DNS...

Page 120: ...command line interface CLI commands either on a console device attached to the console CON port on the front panel or over a telnet connection to a network connected to the Ethernet management MGMT port on the front panel This procedure connects the switch to the network but does not enable it to forward traffic For complete information about enabling the switch to forward traffic including exampl...

Page 121: ...the name includes spaces enclose the name in double quotation marks edit root set system host name host name 7 Create a user account edit root set system login user user name authentication plain text password New password password Retype new password password 8 Set the user account class to super user edit root set system login user user name class super user 9 Configure the switch s domain name ...

Page 122: ...utes to remote subnets with access to the management port Access to the management port is limited to the local subnet For more information about static routes see the Junos OS Administration Library for Routing Devices edit root set routing options static route remote subnet next hop destination IP retain no readvertise 14 Configure the telnet service at the edit system services hierarchy level e...

Page 123: ...e finished configuring the switch exit configuration mode edit root switch exit root switch NOTE Ensure that the removable storage media that contains a copy of Junos OS is not installed in the switch except when you want to install Junos OS from the storage media If the storage media is installed during normal operation and if the switch is rebooted intentionally or accidentally for example as a ...

Page 124: ...taining Components Routine Maintenance Procedures for EX9251 Switches 116 Maintaining the EX9251 Cooling System 118 Maintaining the EX9251 Power System 122 Maintaining Transceivers 132 Maintain Fiber Optic Cables 141 ...

Page 125: ... preventive maintenance procedures Action Inspect the installation site for moisture loose wires or cables and excessive dust Make sure that airflow is unobstructed around the switch and into the air intake vents Check the status reporting devices on the front panel in EX9251 switches alarms and LEDs Inspect the air filter or fan tray at the rear of the switch replacing it every 6 months for optim...

Page 126: ...re 42 degrees C 107 degrees F CPU temperature 42 degrees C 107 degrees F DRAM 16340 MB 16384 MB installed Memory utilization 6 percent 5 sec CPU utilization User 2 percent Background 0 percent Kernel 19 percent Interrupt 0 percent Idle 79 percent 1 min CPU utilization User 2 percent Background 0 percent Kernel 19 percent Interrupt 0 percent Idle 79 percent 5 min CPU utilization User 2 percent Back...

Page 127: ...trostatic discharge ESD damage See Prevention of Electrostatic Discharge Damage Ensure that you have the following parts and tools available An ESD wrist strap Phillips screwdriver number 2 A replacement fan tray The fan tray in an EX9251 switch is a hot insertable and hot removable field replaceable unit FRU You can remove and replace it while the switch is running without turning off power to th...

Page 128: ...ated on the inside of the fan tray to release it from the chassis 4 Grasp the fan tray handle and pull it out approximately 1 to 3 inches 5 Place one hand under the fan tray to support it and pull the fan tray completely out of the chassis Figure 51 Removing a Fan Tray from an EX9251 Switch Installing a Fan Tray in an EX9251 Switch Before you begin to install a fan tray Ensure you understand how t...

Page 129: ...f the strap to the ESD point on the switch 2 Grasp the fan tray handle and place one hand under the fan tray for support 3 Place the fan tray on the respective slot and carefully push the fan tray into the chassis until the socket lock snaps into place and holds it 4 Tighten the screw on the fan tray faceplate using the Phillips screwdriver number 2 to secure the fan tray in the chassis Figure 52 ...

Page 130: ... of the cooling system issue the show chassis environment command The output for EX9251 switches is similar to the following user switch show chassis environment Class Item Status Measurement Temp CB 0 Top Right Inlet Sensor OK 6 degrees C 42 degrees F CB 0 Top Left Inlet Sensor OK 7 degrees C 44 degrees F CB 0 Top Right Exhaust Sensor OK 13 degrees C 55 degrees F CB 0 Top Left Exhaust Sensor OK 2...

Page 131: ...Fan Tray 0 Fan 0 OK Spinning at normal speed Fan Tray 0 Fan 1 OK Spinning at normal speed Fan Tray 1 Fan 0 OK Spinning at normal speed Fan Tray 1 Fan 1 OK Spinning at normal speed Fan Tray 2 Fan 0 OK Spinning at normal speed Fan Tray 2 Fan 1 OK Spinning at normal speed Maintaining the EX9251 Power System IN THIS SECTION Powering Off an EX9251 Switch 122 Removing an AC Power Supply from an EX9251 S...

Page 132: ... connected to the switch issue the request vmhost power off command user host request vmhost power off Power off the vmhost yes no no yes The switch shuts down and the console displays the message Power down To power on the switch again press the button labeled OFFLINE on the front panel of the switch for one second You can take the switch offline by pressing the button labeled OFFLINE on the fron...

Page 133: ... Do not leave the power supply slot empty for a long time while the switch is operational Either replace the power supply unit promptly or install a cover panel over the empty slot NOTE After powering off a power supply wait for at least 60 seconds before turning it back on To remove an AC power supply from an EX9251 switch see Figure 53 on page 125 1 Switch off the dedicated customer site circuit...

Page 134: ... hot insertable and hot removable field replaceable unit FRU You can remove and replace it while the switch is running without turning off power to the switch or disrupting switching functions You can install up to two AC power supplies in an EX9251 switch The power supplies install in the slots on the rear panel of the chassis CAUTION EX9251 switches use either AC or DC power supplies Do not mix ...

Page 135: ...te or the cover panel installed in the adjacent power supply slot Figure 54 Installing an AC Power Supply in an EX9251 Switch 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 doe...

Page 136: ...omptly or install a cover panel over the empty slot WARNING Before you perform DC power procedures ensure there is no power to the DC circuit To ensure that all power is off locate the circuit breaker on the panel board that services the DC circuit switch the circuit breaker to the off position and tape the switch handle of the circuit breaker in the off position NOTE After powering off a power su...

Page 137: ...hassis 11 Pull the power supply straight out of the chassis 12 Either replace a power supply promptly or install a cover panel over the empty slot Figure 56 Removing a DC Power Supply from an EX9251 Switch Installing a DC Power Supply in an EX9251 Switch Before you install a DC power supply in the switch Ensure you understand how to prevent electrostatic discharge ESD damage See Prevention of Elec...

Page 138: ...he DC circuit To ensure that all power is off locate the circuit breaker on the panel board that services the DC circuit switch the circuit breaker to the off position and tape the switch handle of the circuit breaker in the off position To install a DC power supply in an EX9251 switch see Figure 57 on page 130 1 Wrap and fasten one end of the ESD wrist strap around your bare wrist and connect the...

Page 139: ...ervice 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 connect power to a DC power supply see Connecting DC Power to an EX9251 Switch ...

Page 140: ...ne Airflow Front to Back Temperature OK 19 degrees C 66 degrees F Temperature OK 15 degrees C 59 degrees F Fan Sensor 4260 RPM DC Output Voltage V Current A Power W Load 12 06 7 84 2 Make sure that the power and grounding cables are arranged so that they do not obstruct access to other switch components Routinely check the status LEDs on the power supply faceplates and the front panel in EX9251 sw...

Page 141: ...ble An antistatic bag or an antistatic mat Rubber safety caps to cover the transceiver and fiber optic cable connector A dust cover to cover the port or a replacement transceiver The transceivers for Juniper Networks devices are hot removable and hot insertable field replaceable units FRUs You can remove and replace them without powering off the device or disrupting device functions NOTE After you...

Page 142: ...ler than a few inches in diameter can damage the cables and cause problems that are difficult to diagnose 4 Remove the cable connected to the transceiver see Disconnect a Fiber Optic Cable Cover the transceiver and the end of each fiber optic cable connector with a rubber safety cap immediately after disconnecting the fiber optic cables 5 If there is a cable management system arrange the cable in ...

Page 143: ...eiver 1 Ejector lever To remove a CFP transceiver a Using your fingers loosen the screws on the transceiver b Grasp the screws on the transceiver and gently slide the transceiver approximately 0 5 in 1 3 cm straight out of the port CAUTION To prevent ESD damage to the transceiver do not touch the connector pins at the end of the transceiver 7 Using your fingers grasp the body of the transceiver an...

Page 144: ...arty optical modules and cables that are not qualified or supplied by Juniper Networks If you face a problem running a Juniper device that uses third party optical modules or cables JTAC may help you diagnose host related issues if the observed issue is not in the opinion of JTAC related to the use of the third party optical modules or cables Your JTAC engineer will likely request that you check t...

Page 145: ... save it in case you need to cover the port later If you are hot swapping a transceiver wait for at least 10 seconds after removing the transceiver from the port before installing a new transceiver 5 Using both hands carefully place the transceiver in the empty port The connectors must face the chassis CAUTION Before you slide the transceiver into the port ensure that the transceiver is aligned co...

Page 146: ...op in the cable management system Placing fasteners on the loop helps to maintain its shape CAUTION Do not let fiber optic cable hang free from the connector Do not allow fastened loops of cable to dangle which stresses the cable at the fastening point CAUTION Avoid bending fiber optic cable beyond its minimum bend radius An arc smaller than a few inches in diameter can damage the cable and cause ...

Page 147: ... receive the QSFP28 transceiver Have a rubber safety cap ready for the QSFP28 transceiver and the cable 2 Wrap and fasten one end of an ESD wrist strap around your bare wrist and connect the other end of the strap to the ESD point on the switch 3 Label the cable connected to the QSFP28 transceiver so that you can later reconnect it to the correct QSFP28 transceiver 4 Disconnect the cable from the ...

Page 148: ...ransceiver in a device ensure that you have taken the necessary precautions for safe handling of lasers see Laser and LED Safety Guidelines and Warnings Ensure that you have a rubber safety cap available to cover the transceiver The transceivers for Juniper Networks devices are hot removable and hot insertable field replaceable units FRUs You can remove and replace them without powering off the de...

Page 149: ...can potentially cause thermal damage to or reduce the lifespan of the host equipment Any damage to the host equipment due to the use of third party optical modules or cables is the users responsibility Juniper Networks will accept no liability for any damage caused due to such use To install a QSFP28 transceiver see Figure 61 on page 140 1 Wrap and fasten one end of an ESD wrist strap around your ...

Page 150: ...loping stress points Secure the cable so that it does not support its own weight as it hangs to the floor Place excess cable out of the way in a neatly coiled loop in the cable management system Placing fasteners on the loop helps to maintain its shape CAUTION Do not let fiber optic cable hang free from the connector Do not allow fastened loops of cable to dangle which stresses the cable at the fa...

Page 151: ...cap Save the cap 2 Remove the rubber safety cap from the optical transceiver Save the cap 3 Insert the cable connector into the optical transceiver see Figure 62 on page 142 Figure 62 Connect a Fiber Optic Cable to an Optical Transceiver Installed in a Device g000704 Transceiver Fiber optic cable 4 Secure the cables so that they do not support their own weight Place excess cable out of the way in ...

Page 152: ...d edit interfaces user device set interface name disable LASER WARNING Do not look directly into a fiber optic transceiver or into the ends of fiber optic cables Fiber optic transceivers and fiber optic cables connected to transceivers emit laser light that can damage your eyes 2 Carefully unplug the fiber optic cable connector from the transceiver 3 Cover the transceiver with a rubber safety cap ...

Page 153: ...e expensive to repair To prevent damage from overuse attach a short fiber extension to the optical equipment The short fiber extension absorbs wear and tear due to frequent plugging and unplugging which is easier and less expensive to replace than the instruments Keep fiber optic cable connections clean Microdeposits of oil and dust in the canal of the transceiver or cable connector can cause loss...

Page 154: ...5 CHAPTER Troubleshooting Hardware Troubleshooting EX9251 Components 146 ...

Page 155: ...ch 147 Troubleshoot Temperature Alarms in EX Series Switches 149 Troubleshooting the Cooling System in an EX9251 Switch IN THIS SECTION Problem 146 Cause 146 Solution 146 Problem Description The fans in the fan trays are not functioning normally Cause Solution Follow these guidelines to troubleshoot the fans Check the fan tray status LEDs and alarm LED 146 ...

Page 156: ...er the fans are pushing air out of the chassis If a fan tray is removed both a warning alarm and a critical alarm may be displayed The following conditions automatically cause the fans to run at full speed and also trigger the indicated alarm A fan fails critical alarm The switch temperature exceeds the temperature warm threshold warning alarm The temperature of the switch exceeds the temperature ...

Page 157: ...d power supplies As shown in the sample output the value Online in the rows labeled State must indicate that each of the power supplies is functioning normally The output for EX9251 switches is similar to the following user switch show chassis environment pem PEM 0 status State Online Airflow Front to Back Temperature OK 21 degrees C 69 degrees F Temperature OK 13 degrees C 55 degrees F Fan Sensor...

Page 158: ...tatus through the CLI or display Check that the DC circuit breaker or AC input switch is in the on position and that the power supply is receiving power Verify that the source circuit breaker has the proper current rating Each power supply must be connected to a separate source circuit breaker Verify that the AC power cord or DC power cables from the power source to the switch are not damaged If t...

Page 159: ...ature within the recommended range To prevent airflow restriction allow at least 6 inches 15 2 cm of clearance around the ventilation openings 1 Connect to the switch by using Telnet and issue the show chassis environment command This command displays environmental information about the switch chassis including the temperature The command also displays information about the fans power supplies and...

Page 160: ...egrees F FPC 3 XQ TSen OK 67 degrees C 152 degrees F FPC 3 XQ Chip OK 63 degrees C 145 degrees F FPC 3 XQ_XR0 TSen OK 67 degrees C 152 degrees F FPC 3 XQ_XR0 Chip OK 68 degrees C 154 degrees F FPC 3 XM TSen OK 67 degrees C 152 degrees F FPC 3 XM Chip OK 76 degrees C 168 degrees F FPC 3 XF TSen OK 67 degrees C 152 degrees F FPC 3 XF Chip OK 75 degrees C 167 degrees F FPC 3 PLX PCIe Switch TSe OK 51...

Page 161: ...Fans Information about the status of fans and blowers Item Information about the chassis components Flexible PIC Concentrators FPCs that is the line cards Control Boards CBs Routing Engines Power entry modules PEMs that is the power supplies Status Status of the specified chassis component For example if Class is Fans the fan status can be OK The fans are operational Testing The fans are being tes...

Page 162: ... The table lists output fields in the approximate order in which they appear Table 39 show chassis temperature thresholds Output Fields Field Name Field Description Item Chassis component You can configure the threshold information for components such as the chassis the Routing Engines and FPC for each slot in each FRU to display in the output By default information is displayed only for the chass...

Page 163: ...xceeded on the device to trigger a red alarm when one or more fans have failed or are missing Fire shutdown Temperature threshold in degrees Celsius at which the switch shuts down in case of fire When a temperature alarm is triggered you can identify the condition that triggered it by running the show chassis environment command to display the chassis temperature values for each component and comp...

Page 164: ...ature is above threshold temperature Ensure that the ambient temperature is within the threshold temperature limit See Environmental Requirements and Specifications for EX Series Switches Fan module or fan tray has failed Perform the following steps 1 Check the fan 2 Replace the faulty fan module or fan tray 3 If the above two checks show no problems open a support case using the Case Manager link...

Page 165: ...6 CHAPTER Contacting Customer Support and Returning the Chassis or Components Returning an EX9251 Chassis or Components 157 ...

Page 166: ... to return one or more components determine the serial number for each component For instructions see Locating the Serial Number on an EX9251 Switch or Component on page 158 2 Obtain an RMA number from JTAC as described in Contact Customer Support to Obtain Return Material Authorization NOTE Do not return any component to Juniper Networks unless you have first obtained an RMA number Juniper Networ...

Page 167: ...e switch is operational and you can access the command line interface CLI you can list serial numbers for the switch and for some components with a CLI command If you do not have access to the CLI or if the serial number for the component does not appear in the command output you can locate the serial number ID label on the physical switch or component NOTE If you want to find the serial number on...

Page 168: ... FRUs you must remove the FRU from the switch chassis to see the FRU s serial number ID label Fan tray The serial number ID label is on the top of the fan tray see Figure 64 on page 159 Figure 64 Location of the Serial Number ID Label on a Fan Tray AC power supply The serial number ID label is on the top of the AC power supply see Figure 65 on page 159 Figure 65 Location of the Serial Number ID La...

Page 169: ... Juniper Networks for repair or replacement obtain a Return Material Authorization RMA number from Juniper Networks Technical Assistance Center JTAC You must obtain an RMA number before you attempt to return the component After locating the serial number of the device or hardware component you want to return open a service request with the Juniper Networks Technical Assistance Center JTAC on the W...

Page 170: ...he star key to be routed to the next available support engineer The support representative validates your request and issues an RMA number for return of the component Packing an EX9251 Switch or Component IN THIS SECTION Packing an EX9251 Switch 162 Packing EX9251 Switch Components for Shipping 163 If you are returning an EX9251 switch or component to Juniper Networks for repair or replacement pac...

Page 171: ...equest system halt Wait until a message appears on the console confirming that the operating system has halted For more information about the command see the CLI Explorer 3 Wrap and fasten one end of the ESD wrist strap around your bare wrist and connect the other end of the strap to the ESD point on the switch 4 Shut down power to the switch by pressing the AC input switch or DC circuit breaker f...

Page 172: ...s in antistatic bags Use the original packing materials if they are available If the original packing materials are not available ensure the component is adequately packed to prevent damage during transit The packing material you use must be able to support the weight of the component Ensure that the components are adequately protected by wrapping them well with packing materials Pack the componen...

Page 173: ...Warning 172 Ramp Warning 174 Rack Mounting and Cabinet Mounting Warnings 174 Grounded Equipment Warning 178 Radiation from Open Port Apertures Warning 179 Laser and LED Safety Guidelines and Warnings 180 Maintenance and Operational Safety Guidelines and Warnings 183 General Electrical Safety Guidelines and Warnings 189 Action to Take After an Electrical Accident 190 Prevention of Electrostatic Dis...

Page 174: ...nce Warning 197 DC Power Wiring Terminations Warning 199 Multiple Power Supplies Disconnection Warning 200 TN Power Warning 201 Agency Approvals for EX9251 Switches 202 Compliance Statements for EMC Requirements for EX Series Switches 204 Compliance Statements for Acoustic Noise for EX Series Switches 208 ...

Page 175: ...ard to people or make the equipment unsafe Never attempt to lift an object that is too heavy for one person to handle Never install or manipulate wiring during electrical storms Never install electrical jacks in wet locations unless the jacks are specifically designed for wet environments Operate the device only when it is properly grounded Follow the instructions in this guide to properly ground ...

Page 176: ...might overlook this important information if it was not highlighted in a Note CAUTION You need to observe the specified guidelines to prevent minor injury or discomfort to you or severe damage to the device Attention Veillez à respecter les consignes indiquées pour éviter toute incommodité ou blessure légère voire des dégâts graves pour l appareil LASER WARNING This symbol alerts you to the risk o...

Page 177: ...n Unfällen bewußt Avvertenza Questo simbolo di avvertenza indica un pericolo La situazione potrebbe causare infortuni alle persone Prima di lavorare su qualsiasi apparecchiatura occorre conoscere i pericoli relativi ai circuiti elettrici ed essere al corrente delle pratiche standard per la prevenzione di incidenti Advarsel Dette varselsymbolet betyr fare Du befinner deg i en situasjon som kan føre...

Page 178: ...rato e qualificato deve essere autorizzato ad installare o sostituire questo apparecchio Advarsel Kun kvalifisert personell med riktig opplæring bør montere eller bytte ut dette utstyret Aviso Este equipamento deverá ser instalado ou substituído apenas por pessoal devidamente treinado e qualificado Atención Estos equipos deben ser instalados y reemplazados exclusivamente por personal técnico adecu...

Page 179: ...l and operate your equipment Fire Suppression In the event of an electrical hazard or an electrical fire you should first turn power off to the equipment at the source Then use a Type C fire extinguisher which uses noncorrosive fire retardants to extinguish the fire Fire Suppression Equipment Type C fire extinguishers which use noncorrosive fire retardants such as carbon dioxide and Halotron are m...

Page 180: ...ARNING Read the installation instructions before you connect the device to a power source Waarschuwing Raadpleeg de installatie aanwijzingen voordat u het systeem met de voeding verbindt Varoitus Lue asennusohjeet ennen järjestelmän yhdistämistä virtalähteeseen Avertissement Avant de brancher le système sur la source d alimentation consulter les directives d installation Warnung Lesen Sie die Inst...

Page 181: ...riggers or movers Restricted Access Warning WARNING This unit is intended for installation in restricted access areas A restricted access area is an area to which access can be gained only by service personnel through the use of a special tool lock and key or other means of security and which is controlled by the authority responsible for the location Waarschuwing Dit toestel is bedoeld voor insta...

Page 182: ...jon i områder med begrenset adgang Et område med begrenset adgang gir kun adgang til servicepersonale som bruker et spesielt verktøy lås og nøkkel eller en annen sikkerhetsanordning og det kontrolleres av den autoriteten som er ansvarlig for området Aviso Esta unidade foi concebida para instalação em áreas de acesso restrito Uma área de acesso restrito é uma área à qual apenas tem acesso o pessoal...

Page 183: ... No usar una rampa inclinada más de 10 grados Varning Använd inte ramp med en lutning på mer än 10 grader Rack Mounting and Cabinet Mounting Warnings Ensure that the rack or cabinet in which the device is installed is evenly and securely supported Uneven mechanical loading could lead to a hazardous condition WARNING To prevent bodily injury when mounting or servicing the device in a rack take the ...

Page 184: ...tel in het rek monteert of het daar een servicebeurt geeft Varoitus Kun laite asetetaan telineeseen tai huolletaan sen ollessa telineessä on noudatettava erityisiä varotoimia järjestelmän vakavuuden säilyttämiseksi jotta vältytään loukkaantumiselta Noudata seuraavia turvallisuusohjeita Juniper Networks switch on asennettava telineeseen joka on kiinnitetty rakennukseen Jos telineessä ei ole muita l...

Page 185: ...ell ist das Gestell von unten nach oben zu laden wobei das schwerste Bauteil unten im Gestell anzubringen ist Wird das Gestell mit Stabilisierungszubehör geliefert sind zuerst die Stabilisatoren zu installieren bevor Sie die Einheit im Gestell anbringen oder sie warten Avvertenza Per evitare infortuni fisici durante il montaggio o la manutenzione di questa unità in un supporto occorre osservare sp...

Page 186: ...eciais para se certificar de que o sistema possui um suporte estável As seguintes directrizes ajudá lo ão a efectuar o seu trabalho com segurança O Juniper Networks switch deverá ser instalado numa prateleira fixa à estrutura do edificio Esta unidade deverá ser montada na parte inferior da estante caso seja esta a única unidade a ser montada Ao montar esta unidade numa estante parcialmente ocupada...

Page 187: ...ällningen Om denna enhet installeras på en delvis fylld ställning skall ställningen fyllas nedifrån och upp med de tyngsta enheterna längst ned på ställningen Om ställningen är försedd med stabiliseringsdon skall dessa monteras fast innan enheten installeras eller underhålls på ställningen Grounded Equipment Warning WARNING This device must be properly grounded at all times Follow the instructions...

Page 188: ...LASER WARNING Because invisible radiation might be emitted from the aperture of the port when no fiber cable is connected avoid exposure to radiation and do not stare into open apertures Waarschuwing Aangezien onzichtbare straling vanuit de opening van de poort kan komen als er geen fiberkabel aangesloten is dient blootstelling aan straling en het kijken in open openingen vermeden te worden Varoit...

Page 189: ...erto Atención Debido a que la apertura del puerto puede emitir radiación invisible cuando no existe un cable de fibra conectado evite mirar directamente a las aperturas para no exponerse a la radiación Varning Osynlig strålning kan avges från en portöppning utan ansluten fiberkabel och du bör därför undvika att bli utsatt för strålning genom att inte stirra in i oskyddade öppningar Laser and LED S...

Page 190: ... laser could permanently damage the eye Avertissement Les connecteurs à fibre optique sans terminaison peuvent émettre un rayonnement laser invisible Le cristallin de l œil humain faisant converger toute la puissance du laser sur la rétine toute focalisation directe de l œil sur une source laser même de faible puissance peut entraîner des lésions oculaires irréversibles Class 1 Laser Product Warni...

Page 191: ...NG Do not stare into the laser beam or view it directly with optical instruments Waarschuwing Niet in de straal staren of hem rechtstreeks bekijken met optische instrumenten Varoitus Älä katso säteeseen äläkä tarkastele sitä suoraan optisen laitteen avulla Avertissement Ne pas fixer le faisceau des yeux ni l observer directement à l aide d instruments optiques Warnung Nicht direkt in den Strahl bl...

Page 192: ...tning Activity Warning 186 Operating Temperature Warning 187 Product Disposal Warning 188 While performing the maintenance activities for devices observe the following guidelines and warnings Battery Handling Warning WARNING Replacing a battery incorrectly might result in an explosion Replace a battery only with the same or equivalent type recommended by the manufacturer Dispose of used batteries ...

Page 193: ...ner Avvertenza Pericolo di esplosione se la batteria non è installata correttamente Sostituire solo con una di tipo uguale o equivalente consigliata dal produttore Eliminare le batterie usate secondo le istruzioni del produttore Aviso Existe perigo de explosão se a bateria for substituída incorrectamente Substitua a bateria por uma bateria igual ou de um tipo equivalente recomendado pelo fabricant...

Page 194: ...Erde angeschlossen werden und können schwere Verbrennungen verursachen oder an die Anschlußklemmen angeschweißt werden Avvertenza Prima di intervenire su apparecchiature collegate alle linee di alimentazione togliersi qualsiasi monile inclusi anelli collane braccialetti ed orologi Gli oggetti metallici si riscaldano quando sono collegati tra punti di alimentazione e massa possono causare ustioni g...

Page 195: ...ssa äläkä yhdistä tai irrota kaapeleita ukkosilmalla Avertissement Ne pas travailler sur le système ni brancher ou débrancher les câbles pendant un orage Warnung Arbeiten Sie nicht am System und schließen Sie keine Kabel an bzw trennen Sie keine ab wenn es gewittert Avvertenza Non lavorare sul sistema o collegare oppure scollegare i cavi durante un temporale con fulmini Advarsel Utfør aldri arbeid...

Page 196: ...ot d air constant dégagez un espace d au moins 15 2 cm autour des ouvertures de ventilations Warnung Um einen Router der switch vor Überhitzung zu schützen darf dieser nicht in einer Gegend betrieben werden in der die Umgebungstemperatur das empfohlene Maximum von 40 C überschreitet Um Lüftungsverschluß zu verhindern achten Sie darauf daß mindestens 15 2 cm lichter Raum um die Lüftungsöffnungen he...

Page 197: ...t volgens alle landelijke wetten en voorschriften te worden afgedankt Varoitus Tämän tuotteen lopullisesta hävittämisestä tulee huolehtia kaikkia valtakunnallisia lakeja ja säännöksiä noudattaen Avertissement La mise au rebut définitive de ce produit doit être effectuée conformément à toutes les lois et réglementations en vigueur Warnung Dieses Produkt muß den geltenden Gesetzen und Vorschriften e...

Page 198: ... secteur les ports pour intérieur ne doivent pas être raccordés physiquement aux interfaces prévues pour la connexion à l installation extérieure ou à son câblage Les ports pour intérieur de l appareil sont réservés au raccordement de câbles pour intérieur ou non exposés uniquement L ajout de protections ne constitue pas une précaution suffisante pour raccorder physiquement ces interfaces au câbla...

Page 199: ...ssible hazards in your work area such as moist floors ungrounded power extension cords and missing safety grounds Operate the device within marked electrical ratings and product usage instructions To ensure that the device and peripheral equipment function safely and correctly use the cables and connectors specified for the attached peripheral equipment and make certain they are in good condition ...

Page 200: ...ts antistatic bag see Figure 67 on page 192 in one hand and touch the exposed bare metal of the device with the other hand immediately before inserting the component into the device WARNING For safety periodically check the resistance value of the ESD grounding strap The measurement must be in the range 1 through 10 Mohms Avertissement Par mesure de sécurité vérifiez régulièrement la résistance du...

Page 201: ...To dissipate this charge always ground the cables to a suitable and safe earth ground before connecting them to the system Attention Les câbles ANSI TIA EIA 568 par exemple Cat 5e et Cat 6 peuvent emmagasiner des charges électrostatiques Pour évacuer ces charges reliez toujours les câbles à une prise de terre adaptée avant de les raccorder au système AC Power Electrical Safety Guidelines The follo...

Page 202: ...r the AC powered device and be easily accessible For devices that have more than one power supply connection you must ensure that all power connections are fully disconnected so that power to the device is completely removed to prevent electric shock To disconnect power unplug all power cords one for each power supply Power Cable Warning Japanese WARNING The attached power cable is only for this p...

Page 203: ...s equipos de corriente alterna CA Varning Innan du arbetar med ett chassi eller nära strömförsörjningsenheter skall du för växelströmsenheter dra ur nätsladden DC Power Electrical Safety Guidelines A DC powered device is equipped with a DC terminal block that is rated for the power requirements of a maximally configured device For permanently connected equipment a readily accessible disconnect dev...

Page 204: ... circuit breaker on the panel board that services the DC circuit switch the circuit breaker to the OFF position and tape the device handle of the circuit breaker in the OFF position Waarschuwing Voordat u een van de onderstaande procedures uitvoert dient u te controleren of de stroom naar het gelijkstroom circuit uitgeschakeld is Om u ervan te verzekeren dat alle stroom UIT is geschakeld kiest u o...

Page 205: ...om betjener likestrømkretsen slå strømbryteren AV og teipe bryterhåndtaket på strømbryteren i AV stilling Aviso Antes de executar um dos seguintes procedimentos certifique se que desligou a fonte de alimentação de energia do circuito de corrente contínua Para se assegurar que toda a corrente foi DESLIGADA localize o disjuntor no painel que serve o circuito de corrente contínua e coloque o na posiç...

Page 206: ...tissement Lors de l installation de l appareil la mise à la terre doit toujours être connectée en premier et déconnectée en dernier Warnung Der Erdanschluß muß bei der Installation der Einheit immer zuerst hergestellt und zuletzt abgetrennt werden Avvertenza In fase di installazione dell unità eseguire sempre per primo il collegamento a massa e disconnetterlo per ultimo Advarsel Når enheten instal...

Page 207: ...nzuschliessen Die richtige Anschlusssequenz ist Erdanschluss zu Erdanschluss RTN zu RTN und dann 48V zu 48V Die richtige Sequenz zum Abtrennen der Stromversorgung ist 48V zu 48V RTN zu RTN und dann Erdanschluss zu Erdanschluss Es ist zu beachten dass der Erdanschluss immer zuerst angeschlossen und als letztes abgetrennt wird Avvertenza Mostra la morsettiera dell alimentatore CC Cablare l alimentat...

Page 208: ... is van goedgekeurde aansluitingspunten zoals het gesloten lus type of het grijperschop type waarbij de aansluitpunten omhoog wijzen Deze aansluitpunten dienen de juiste maat voor de draden te hebben en dienen zowel de isolatie als de geleider vast te klemmen Varoitus Jos säikeellinen johdin on tarpeen käytä hyväksyttyä johdinliitäntää esimerkiksi suljettua silmukkaa tai kourumaista liitäntää joss...

Page 209: ...ión Cuando se necesite hilo trenzado utilizar terminales para cables homologados tales como las de tipo bucle cerrado o espada con las lengüetas de conexión vueltas hacia arriba Estos terminales deberán ser del tamaño apropiado para los cables que se utilicen y tendrán que sujetar tanto el aislante como el conductor Varning När flertrådiga ledningar krävs måste godkända ledningskontakter användas ...

Page 210: ...ação de energia deverão ser desconectadas todas as conexões existentes Atención Esta unidad tiene más de una conexión de suministros de alimentación para eliminar la alimentación por completo deben desconectarse completamente todas las conexiones Varning Denna enhet har mer än en strömförsörjningsanslutning alla anslutningar måste vara helt avlägsnade innan strömtillförseln till enheten är fullstä...

Page 211: ...N 60950 1 European Norm Safety of Information Technology Equipment IEC 60950 1 Information Technology Equipment Safety Part 1 General Requirements with country deviations EN 60825 1 Safety of Laser Products Part 1 Equipment Classification Requirements and User s Guide EMC EN 300 386 V1 6 1 2012 09 Electromagnetic compatibility and Radio spectrum Matters ERM Telecommunication network equipment Elec...

Page 212: ...ted and Conducted Emissions at 10 meters KN32 KN35 Korea Radiated Emission and Immunity Characteristics at 10 meters KN61000 Korea Immunity Test TEC SD DD EMC 221 05 OCT 16 Supersedes No TEC EMI TEL 001 01 FEB 09 India EMC standard EN 61000 3 2 Power Line Harmonics EN 61000 3 3 Voltage Fluctuations and Flicker EN 61000 4 2 ESD EN 61000 4 3 Radiated Immunity EN 61000 4 4 EFT EN 61000 4 5 Surge EN 6...

Page 213: ...MC requirements for these hardware devices Canada This Class A digital apparatus complies with Canadian ICES 003 Cet appareil numérique de la classe A est conforme à la norme NMB 003 du Canada The Industry Canada label identifies certified equipment This certification means that the equipment meets certain telecommunications network protective operational and safety requirements Industry Canada do...

Page 214: ...hould not attempt to make electrical ground connections by themselves but should contact the appropriate inspection authority or an electrician as appropriate Users should ensure for their own protection that the electrical ground connections of the power utility telephone lines and internal metallic water pipe system if present are connected together This precaution might be particularly importan...

Page 215: ...ct may cause radio interference and in such a situation the user may be required to take adequate measures Japan The preceding translates as follows This is a Class A device In a domestic environment this device might cause radio interference in which case the user needs to take adequate measures VCCI A Korea 206 ...

Page 216: ... Part 15 Statement This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruct...

Page 217: ...oduct family which includes EX Series switches the EX Series Redundant Power System RPS and the XRE200 External Routing Engine Maschinenlärminformations Verordnung 3 GPSGV der höchste Schalldruckpegel beträgt 70 dB A oder weniger gemäss EN ISO 7779 Translation The emitted sound pressure is below 70 dB A per EN ISO 7779 208 ...

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Summary of Contents for EX9251

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Juniper EX9251, Hardware Manual, Page: 155 / 217

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Summary of Contents for EX9251

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