Lenovo RackSwitch G8124E Installation Manual Download Page 37 | Manualshive

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© Copyright Lenovo 2015

Chapter 3: Installing G8124-E Hardware and Options

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5. Secure the switch to the front rack posts with M6 screws (Item 3), washers

(Item 10), and either clip nuts (Item 4) or cage nuts (Item 5). Torque the screws

to approximately 5.7 Nm ± 0.1 Nm (50 inch-pounds).

6. Slide the rear mounting brackets (Item 7 and Item 8) into the slots available on

the front mounting brackets.

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Summary of Contents for RackSwitch G8124E

Page 1: ...Lenovo RackSwitch G8124 E Installation Guide ...

Page 2: ...e LAMC document and the Environmental Notices and User Guide document on the Documentation CD included with the product First Edition August 2015 Copyright Lenovo 2015 Portions Copyright IBM Corporation 2014 LIMITED AND RESTRICTED RIGHTS NOTICE If data or software is delivered pursuant a General Services Administration GSA contract use reproduction or disclosure is subject to restrictions set fort...

Page 3: ...2 SFP Ports 22 Rear Panel 24 Fans 24 Power Supply 24 Chapter 3 Installing G8124 E Hardware and Options 27 Before Installing the G8124 E 28 Recording Important Product Information 28 Required Tools 29 Package Contents 29 Environmental Requirements 29 Preventing Electric Shock 30 Handling Static Sensitive Devices 32 Cabling Guidelines 32 Installing the G8124 E in a Rack 33 Installing the G8124 E in ...

Page 4: ...oubleshooting 63 System LED Is Not Lit 63 Port Link LED Is Not Lit 63 Temperature Sensor Warning 63 Switch Does Not Initialize Boot 63 Appendix A Getting Help and Technical Assistance 65 Appendix B Notices 67 Trademarks 68 Important Notes 68 Recycling information 69 Particulate Contamination 70 Telecommunication Regulatory Statement 71 Electronic Emission Notices 71 Federal Communications Commissi...

Page 5: ... Copyright Lenovo 2015 Contents 5 Appendix C Technical Specifications 75 Physical Characteristics 75 Environmental Specifications 75 Power Specifications 76 Switching Performance 77 ...

Page 6: ...6 G8124 E Installation Guide ...

Page 7: ...n kuin asennat tämän tuotteen lue turvaohjeet kohdasta Safety Information Avant d installer ce produit lisez les consignes de sécurité Vor der Installation dieses Produkts die Sicherheitshinweise lesen Πριν εγκαταστήσετε το προϊόν αυτό διαβάστε τις Πληροφορίες ασφαλείας safety information A termék telepítés előtt olvassa el a Biztonsági előírásokat Prima di installare questo prodotto leggere le In...

Page 8: ...iadenia si prečítajte Bezpečnostné predpisy Pred namestitvijo tega proizvoda preberite Varnostne informacije Antes de instalar este producto lea la información de seguridad Läs säkerhetsinformationen innan du installerar den här produkten Bu ürünü kurmadan önce güvenlik bilgilerini okuyun Youq mwngz yungh canjbinj neix gaxgonq itdingh aeu doeg aen canjbinj soengq cungj vahgangj ancien suisik ...

Page 9: ...ore you install the device Following is a compilation of the statements found throughout this manual Statement 3 CAUTION When laser products such as CD ROMs DVD drives fiber optic devices or transmitters are installed note the following Do not remove the covers Removing the covers of the laser product could result in exposure to hazardous laser radiation There are no serviceable parts inside the d...

Page 10: ... any part that has the following label attached Hazardous voltage current and energy levels are present inside any component that has this label attached There are no serviceable parts inside these components If you suspect a problem with one of these parts contact a service technician Statement 13 DANGER Overloading a branch circuit is potentially a fire hazard and a shock hazard under certain co...

Page 11: ...enovo 2015 Safety Information 11 Statement 25 CAUTION This product contains a Class 1M laser Do not view directly with optical instruments Statement 26 CAUTION Do not place any object on top of rack mounted devices ...

Page 12: ...n procedures Connect and disconnect cables as described in the following table when you install move or open covers on this product or attached devices To Connect 1 Turn OFF all power sources and equipment that is to be attached to this product 2 Attach signal cables to the product 3 Attach power cords to the product For ac systems use appliance inlets For dc systems ensure correct polarity of 48 ...

Page 13: ...late a rack cabinet adhere to the following guidelines Always lower the leveling pads on the rack cabinet Always install the stabilizer brackets on the rack cabinet Always install the heaviest devices in the bottom of the rack cabinet Always install devices starting from the bottom of the rack cabinet Do not extend multiple devices from the rack cabinet simultaneously unless the rack mounting inst...

Page 14: ...14 G8124 E Installation Guide ...

Page 15: ...a Web browser based interface or SNMP based network management software Note Other features supported on your switch depend on the specific firmware installed For more information see the Application Guide and Command Reference for your specific switch and its installed firmware G8124 E Documentation About this Installation Guide This Installation Guide provides information and instructions for in...

Page 16: ...entation CD contains documentation for your switch in Portable Document Format PDF The Documentation CD includes the product Safety Information document the License Machine Access Code LAMC document and the Environmental Notices and User Guide document The Documentation CD requires the following minimum hardware and software Microsoft Windows NT 4 0 with Service Pack 3 or later Windows 2000 or Red...

Page 17: ...the Lenovo website Procedures for locating firmware and documentation might vary slightly from what is described in this document For information about switch hardware and firmware features specifications and standards including their configuration see the Application Guide for your specific switch and its installed firmware For information about the switch information statistics and individual co...

Page 18: ...18 G8124 E Installation Guide ...

Page 19: ...front and rear of the switch Figure 1 RackSwitch G8124 E front panel Figure 2 RackSwitch G8124 E management panel detail Figure 3 RackSwitch G8124 E rear panel with AC power supplies Mgmt B A Reset 10101 9 10 11 12 5 6 7 8 17 18 19 20 13 14 15 16 21 22 23 24 1 2 3 4 SP L A MB MS Stacking Management Panel SFP Ports System Status LEDs Mgmt B A Reset 10101 MB MS Stacking Reset Button Mini USB Serial ...

Page 20: ...f the patch cable to the RJ 45 to DB9 adapter see the following illustration Figure 4 Console cable connections If using cables other than those from the included kit ensure that they are compatible with the port pin assignments shown in the following tables Table 1 Switch mini USB port connector pin assignments Pin Number Function 1 No connect 2 SIN RS 232 Input 3 SOUT RS 232 Output 4 No connect ...

Page 21: ...gure Figure 5 RJ 45 management port LEDs Status LEDs for the RJ 45 management port are described in the following table Reset Button The Reset button is recessed within a hole on the front panel Use a straightened paper clip or similar object to press the Reset button The Reset button allows technicians to reset the switch as follows Normal reset Press and release Reset The switch resets and reloa...

Page 22: ... a list of compatible transceivers and DACs see the Lenovo Networking Catalog The switching ports are described in the following sections For information about ports on the management panel see Management Panel on page 20 SFP Ports Statement 3 CAUTION When laser products such as CD ROMs DVD drives fiber optic devices or transmitters are installed note the following Do not remove the covers Removin...

Page 23: ...d optical or copper SFP or SFP transceivers or DACs Transceivers must be purchased separately SFP LEDs Status LEDs for the SFP ports are described in the following table Some laser products contain an embedded Class 3A or Class 3B laser diode Note the following Laser radiation when open Do not stare into the beam do not view directly with optical instruments and avoid direct exposure to the beam T...

Page 24: ...perature drops from 40 C 104 F to 35 C 95 F If there is a failure of one or more fans the front panel Fan LED flashes Power Supply For redundancy the G8124 E includes two internal AC power supplies Each of the two IEC 320 power connectors can be attached to a universal grounded AC power source Statement 5 CAUTION The power control button on the device and the power switch on the power supply do no...

Page 25: ...ds dc power sources network connections telecommunications systems and serial cables before you open the device covers unless instructed otherwise in the installation and configuration procedures Connect and disconnect cables as described in the following table when you install move or open covers on this product or attached devices To Connect 1 Turn OFF all power sources and equipment that is to ...

Page 26: ...t of the switch the Power LED on the management panel indicates the general status of the power supplies The LED flashes when only one power cord is connected and is steady when both power cords are connected see System Status LEDs on page 22 ...

Page 27: ...ackage Environmental requirements Vital safety information Installing the switch in one of the supported rack types Installing the G8124 E in a Standard Equipment Rack on page 33 Installing the G8124 E in a Lenovo System x or Power Rack on page 35 Installing the G8124 E in a Lenovo iDataPlex Rack on page 39 Installing the Air Duct Option on page 42 Installing Port Transceivers on page 46 Note For ...

Page 28: ...tch These labels also include the Media Access Control MAC address on the rear panel of unit of the switch Though helpful the MAC address is not required for opening a service call Print this page and record product information below Keep the information in a safe place for future reference You will need this information when you register the switch or open a service call with Lenovo For convenien...

Page 29: ...pter Two AC power cords One Documentation CD which includes the Systems Information document One Environmental Notices CD One Important Notices document One Warranty Information document For a list of compatible switch components and options such as rack mounting kits modules cords and cables see the Lenovo Networking Catalog Environmental Requirements This section describes the basic environmenta...

Page 30: ...A certified cord set consisting of a minimum of 18 AWG Type SVT or SJT three conductor cord a maximum of 15 feet in length and a parallel blade grounding type attachment plug rated 15 amperes 125 volts For units intended to be operated at 230 volts U S use Use a UL listed and CSA certified cord consisting of a minimum of 18 AWG Type SVT or SJT three conductor cord a maximum of 15 feet in length an...

Page 31: ...lation and configuration procedures Connect and disconnect cables as described in the following table when you install move or open covers on this product or attached devices To Connect 1 Turn OFF all power sources and equipment that is to be attached to this product 2 Attach signal cables to the product 3 Attach power cords to the product For ac systems use appliance inlets For dc systems ensure ...

Page 32: ...evice from its package and install it directly into the switch without setting it down If it is necessary to set down the device put it back into its static protective package Do not place the device on a switch cover or on a metal surface Take additional care when you handle devices during cold weather Heating reduces indoor humidity and increases static electricity Cabling Guidelines Make sure t...

Page 33: ... Equipment Rack This section describes how to install the G8124 E in a standard 19 inch equipment rack using the mounting kit included with the switch For information about mounting the switch in other supported racks see the appropriate section in this chapter The following parts are included in the standard mounting kit Attention The rack mounting frame may be unable to support the weight of the...

Page 34: ...ix the new label to the bottom of the new switch 2 Attach a mounting bracket Item 1 to each side of the switch with M4 screws Item 2 Torque the screws to approximately 2 0 newton meters Nm 0 1 Nm 17 7 inch pounds 3 From the front slide the switch into the rack at the desired height 4 Secure the switch unit to the rack posts with M6 screws Item 3 washers Item 6 and either clip nuts Item 4 or cage n...

Page 35: ...t Rail Kit This kit must be purchased separately It includes the following parts Note When using a System x or Power 4 post rack the 4 Post Rail Kit is compatible with the optional air duct kit available separately See Installing the Air Duct Option on page 42 for details Statement 26 CAUTION Do not place any object on top of rack mounted devices Table 8 Lenovo Adjustable 19 4 Post Rail Kit parts ...

Page 36: ...s switch is a replacement switch copy the product information from the original switch onto the RID label that is shipped with replacement switch and affix the new label to the bottom of the new switch 2 Remove the rear cover screws 3 Attach the front mounting brackets Item 1 to each side of the switch with M4 screws Item 2 Torque the screws to approximately 2 0 newton meters Nm 0 1 Nm 17 7 inch p...

Page 37: ...h to the front rack posts with M6 screws Item 3 washers Item 10 and either clip nuts Item 4 or cage nuts Item 5 Torque the screws to approximately 5 7 Nm 0 1 Nm 50 inch pounds 6 Slide the rear mounting brackets Item 7 and Item 8 into the slots available on the front mounting brackets 5 10 3 8 7 ...

Page 38: ...the rear brackets to the front brackets with M3 5 screws Item 6 Torque the screws to approximately 0 5 Nm 4 inch pounds 9 If installing the 1U air duct option see the instruction on page 42 10 Connect all external cables in accordance with the Cabling Guidelines on page 32 11 Initialize the switch See Chapter 5 Initializing the G8124 E on page 59 12 If the switch is a replacement unit set Vital Pr...

Page 39: ...ttention For earthquake stability mount the switch in a 4 post rack Statement 26 CAUTION Do not place any object on top of rack mounted devices To install the G8124 E in an iDataPlex rack complete the following steps 1 Locate record and retain the product switch information in order to configure and register your product See Recording Important Product Information on page 28 Note If this switch is...

Page 40: ...h front mounting brackets Item 1 and rear mounting brackets Item 6 to each side of the switch with M4 screws Item 2 Torque the screws to approximately 2 newton meters Nm 0 1 Nm 17 7 inch pounds 4 From the front slide the switch into the rack at the desired height 1 2 6 ...

Page 41: ...he rear rack posts with M6 screws Item 3 washers Item 5 and clip nuts Item 4 Torque the screws to approximately 5 7 Nm 0 1 Nm 50 inch pounds 7 If installing the 1U air duct option see the instruction on page 42 8 Connect all external cables in accordance with the Cabling Guidelines on page 32 9 Initialize the switch See Chapter 5 Initializing the G8124 E on page 59 10 If the switch is a replacemen...

Page 42: ... Attention The rack mounting frame may not be able to support the weight of the networking switch with only the front post mounting brackets 2 post application If the switch has an undesirable amount of sag it is recommended to use a 4 post mounting kit Attention For earthquake stability mount the switch in a 4 post rack Table 10 Air duct Option Kit parts Item Number Description Quantity 1 Cable t...

Page 43: ...e mounting rail and set them aside to reuse for securing the foam carrier in the next step 2 Place the half shears on the rear side of the foam carriers and use the M3 5 mounting rail screws to secure the foam carrier assemblies snugly against the rear of the G8124 E unit Torque the screws to approximately 1 1 Nm 0 1 Nm 10 inch pounds Note There are additional M3 5 screws in the air duct assembly ...

Page 44: ...ecure the air duct mounting bracket to the rails with M6 screws Torque the screws to approximately 5 7 Nm 0 1 Nm 50 inch pounds 5 Secure the air duct mounting bracket to the rack chassis with M3 5 screws Torque the screws to approximately 1 1 Nm 0 1 Nm 10 inch pounds Tie wraps Tie wraps Power connection Power connection Air duct mounting bracket M6 screws M3 5 screws ...

Page 45: ...45 6 Gently slide the air duct unit side flanges into the card guides until the unit is seated firmly Make sure that the foam strip is oriented on top 7 Secure the air duct unit to the air duct brackets with the two M4 thumbscrews M4 thumbscrews Side flanges Card guides Foam ...

Page 46: ...se excessive force when you insert the transceiver or you might damage the transceiver or the slot The transceiver has a mechanical guide key to prevent you from inserting the transceiver in an incorrect orientation 3 Pull up the locking lever to lock the transceiver into place 4 Connect the cable following the Cabling Guidelines on page 32 To remove an SFP copper transceiver disconnect the cable ...

Page 47: ... the slot The transceiver has a mechanical guide key to prevent you from inserting the transceiver in an incorrect orientation 3 Pull up the locking lever to lock the transceiver into place 4 Connect the fiber optic cable following the Cabling Guidelines on page 32 To remove an SFP optical transceiver disconnect the fiber optic cable and pull down the locking lever to release the transceiver After...

Page 48: ...ver 1 Remove the safety cap and pull the locking lever into the down unlocked position 2 Insert the transceiver into the slot until it clicks into place Use minimal pressure when you insert the transceiver into the slot Do not use excessive force when you insert the transceiver or you might damage the transceiver or the slot The transceiver has a mechanical guide key to prevent you from inserting ...

Page 49: ... Statement 3 CAUTION When laser products such as CD ROMs DVD drives fiber optic devices or transmitters are installed note the following Do not remove the covers Removing the covers of the laser product could result in exposure to hazardous laser radiation There are no serviceable parts inside the device Use of controls or adjustments or performance of procedures other than those specified herein ...

Page 50: ...ng steps 1 Disconnect the port cable from the transceiver 2 Pull down the locking lever to release the transceiver 3 Gently slide the transceiver out of the switch 4 After you remove the transceiver replace the safety cap To replace the transceiver module see the appropriate section under Installing Port Transceivers on page 46 ...

Page 51: ...ove the G8124 E from a standard rack complete the following steps 1 Disconnect all external cables 2 If the air duct option has been installed remove it as described in Removing the Air Duct Option on page 56 3 Loosen and remove M6 screws washers and clip nuts or cage nuts to release the switch unit from the rack 4 Slide the switch unit out of the rack 5 Loosen and remove the M4 screws attaching t...

Page 52: ...r rack complete the following steps 1 Disconnect all external cables 2 If the air duct option has been installed remove it as described in Removing the Air Duct Option on page 56 3 Loosen and remove M3 5 screws that secure the rear brackets to the front brackets 4 Loosen and remove the M6 screws washers and clip nuts or cage nuts that attach the filler plate and rear mounting brackets to the rear ...

Page 53: ...ts 53 5 Slide the rear mounting brackets out of their slots in the front mounting brackets 6 Loosen and remove the M6 screws washers and clip nuts or cage nuts connecting the front mounting brackets to the front rack posts 7 Slide the G8124 E unit out of the rack 8 7 5 10 3 ...

Page 54: ... E from a Lenovo iDataPlex Rack This section describes how to remove the G8124 E from a Lenovo iDataPlex rack To remove the G8124 E from an iDataPlex rack complete the following steps 1 Disconnect all external cables 2 If the 1U air duct option has been installed remove it as described in Removing the Air Duct Option on page 56 3 Loosen and remove the M6 washers screws and clip nuts that attach th...

Page 55: ...e the M6 washers and screws that mount the switch into the rack 5 Slide the switch out of the rack 6 Loosen and remove the M4 screws that attach front and rear mounting brackets to each side of the switch 7 If replacing the unit with another G8124 E see Replacing the G8124 E on page 57 5 3 4 1 2 6 ...

Page 56: ... the M4 thumbscrews securing the air duct unit to the mounting brackets 2 Slide the 1U air duct unit out of the rack To return the component to customer service for replacement see Appendix A Getting Help and Technical Assistance on page 65 to help you gather all the required information After you remove the component securely pack it for shipping For instructions to install a replacement air duct...

Page 57: ...the G8124 E unit securely pack it for shipping Install the replacement G8124 E hardware as directed in Chapter 3 Installing G8124 E Hardware and Options on page 27 Once the hardware is installed configure the Vital Product Data VPD on the replacement switch as shown in the following section Configuring Vital Product Data After you install the replacement G8124 E hardware the new unit you must conf...

Page 58: ...is correct using the following command For more information about using the switch interface see the Application Guide and Command Reference for your switch model and firmware version RS G8124 E config boot mtm 1234 56X New MTM value 1234 56X Please reset the system for the new changes to take effect RS G8124 E config RS G8124 E config boot esn 1000001 RS G8124 E config reload RS G8124 E show sys ...

Page 59: ... status Power Steady green if the both power cords are connected or flashing green if the only one power cord is connected Service Off if the system is OK or flashing if service is required For additional LED indicators see the appropriate section in Chapter 2 Switch Components starting on page 19 Connecting to the Switch Use the switch Command Line Interface CLI to perform additional configuratio...

Page 60: ...ior to your connection you may need to press Enter to display the password prompt Default Configuration Files The switch firmware contains default configuration files that are loaded at the factory When the switch first initializes the default configuration files are loaded into the active switch memory The default settings allow the switch to perform basic functions with minimal effort by the sys...

Page 61: ...r IP interface mode 3 Configure an IP interface subnet mask and VLAN assignment then enable the interface 4 Configure the default gateway Enable the gateway After you configure the IP address for your switch and you have an existing network connection you can use the Telnet program from an external management station to access and control the switch The management station and your switch must be o...

Page 62: ... procedure for updating from an early firmware version to the latest version To check for firmware and documentation updates go to the Lenovo website http support lenovo com Note Changes are made periodically to the Lenovo website Procedures for locating firmware and documentation might vary slightly from what is described in this document Using the Boot Management Menu The Boot Management menu en...

Page 63: ... set to the same configuration If the switch port is set to auto negotiate make sure that the other device is set to auto negotiate Solution 2 Check the cables that connect the port to the other device Make sure that they are connected correctly Make sure that you are using the correct cable type Temperature Sensor Warning Symptom A temperature warning is displayed on the management console Soluti...

Page 64: ...64 G8124 E Installation Guide ...

Page 65: ... switches to make sure that the system and any optional devices are turned on Check for updated software firmware and operating system device drivers for your Lenovo product The Lenovo Warranty terms and conditions state that you the owner of the Lenovo product are responsible for maintaining and updating all software or firmware for the product unless it is covered by an additional maintenance co...

Page 66: ...66 G8124 E Installation Guide ...

Page 67: ...ss or implied warranties in certain transactions therefore this statement may not apply to you This information could include technical inaccuracies or typographical errors Changes are periodically made to the information herein these changes will be incorporated in new editions of the publication Lenovo may make improvements and or changes in the product s and or the program s described in this p...

Page 68: ...nce CD or DVD drive speed is the variable read rate Actual speeds vary and are often less than the possible maximum When referring to processor storage real and virtual storage or channel volume KB stands for 1 024 bytes MB stands for 1 048 576 bytes and GB stands for 1 073 741 824 bytes When referring to hard disk drive capacity or communications volume MB stands for 1 000 000 bytes and GB stands...

Page 69: ...from its retail version if available and might not include user manuals or all program functionality Recycling information Lenovo encourages owners of information technology IT equipment to responsibly recycle their equipment when it is no longer needed Lenovo offers a variety of programs and services to assist equipment owners in recycling their IT products For information on recycling Lenovo pro...

Page 70: ...o may condition provision of repair or replacement of devices or parts on implementation of appropriate remedial measures to mitigate such environmental contamination Implementation of such remedial measures is a customer responsibility Contaminant Limits Particulate The room air must be continuously filtered with 40 atmospheric dust spot efficiency MERV 9 according to ASHRAE Standard 52 21 Air th...

Page 71: ...l interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense Avis de Conformité à la Réglementation d Industrie Canada Cet appareil numérique de la classe A est conforme à la norme NMB 003 du Canada Australia and New Zealand Class A Statement At...

Page 72: ...ind die Geräte wie in den Handbüchern beschrieben zu installieren und zu betreiben Des Weiteren dürfen auch nur von der Lenovo empfohlene Kabel angeschlossen werden Lenovo übernimmt keine Verantwortung für die Einhaltung der Schutzanforderungen wenn das Produkt ohne Zustimmung der Lenovo verändert bzw wenn Erweiterungskomponenten von Fremdherstellern ohne Empfehlung der Lenovo gesteckt eingebaut w...

Page 73: ...Einhaltung des EMVG sicherzustellen sind die Geräte wie in den Handbüchern angegeben zu installieren und zu betreiben VCCI Class A Statement This is a Class A product based on the standard of the Voluntary Control Council for Interference VCCI If this equipment is used in a domestic environment radio interference may occur in which case the user may be required to take corrective actions Japan Ele...

Page 74: ...74 G8124 E Installation Guide Russia Electromagnetic Interference EMI Class A Statement People s Republic of China Class A Electronic Emission Statement Taiwan Class A Compliance Statement ...

Page 75: ...ensions H x W x D 4 4 x 43 9 x 38 1 cm 1 73 x 17 3 x 15 0 in Weight 6 4 kg 13 5 lb maximum Airflow Available options for rear to front or front to rear airflow Table 12 G8124 E environmental specifications Specification Measurement Temperature ambient operating 0 C to 40 C 32 to 104 F Temperature one fan failure operating 0 C to 35 C 32 to 95 F Temperature storage 40 C to 85 C 40 to 185 F Relative...

Page 76: ...1 load sharing redundant AC input frequency universal 50 60 Hz AC input voltage universal 100 240 VAC AC inrush current 15A AC input current typical 2 75 A RMS 120 VAC 1 435 A RMS 230 VAC AC input current maximum 3 125 A RMS 120 VAC 1 630 A RMS 230 VAC AC input fuse internal 5 A Power supply rated output power 275 W each System power dissipation typical 200 W DC output voltage nominal 12 V DC outp...

Page 77: ...rmware installed For more information see the Application Guide and Command Reference for your specific switch and its installed firmware Table 14 G8124 E feature performance characteristics Feature Characteristics Switching architecture Non blocking Throughput 240 Gbps full duplex Ethernet line rate 100 Deterministic port to port latency less than 700 ns with 64 byte packets IEEE 802 1Q VLANs 102...

Page 78: ...78 G8124 E Installation Guide ...

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