Instruction/ maintenance manual of the product SMC TigerCard 10G SMC Networks
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T igerStack 10G Gigabit Ether net Switch ◆ 24/48 auto-M DI/MDI-X 10 /100/1 000 B ASE -T po rts ◆ 4 ports shared wit h 4 SFP transcei v er slots ◆ Non-blocking switching archit ecture ◆ Support.
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38 T esla Irvi ne, CA 9261 8 Phone: (949) 67 9-8000 T igerStack 10G Installation Guide From S MC’ s T iger line of feature-ri ch workgro up LAN so lutions October 2004 Pub.
Information fur nishe d by SM C Netw orks , Inc . (SMC) is believ ed to be accur ate and r eliable . Ho weve r, no respon sibil ity is assumed by SM C for its use, nor fo r any inf ring emen ts of pate nts or other rig hts o f third par t ies wh ich m ay res ul t fr o m it s us e.
i L IMITED W ARRANTY Limited W ar ranty Statement: S MC N etworks, Inc. (“SMC ”) war ran ts it s prod ucts to be free f rom defects in workmanshi p and mat erials , under nor mal use and s er vice, for the applicable w ar ranty ter m.
ii WARRA NT IES E X CLU SIV E: IF AN SM C PR ODUCT DOES NOT OPE RATE A S W ARRANTED ABO VE, CUSTOMER’S SOL E REMED Y SHALL BE R EP AIR OR REPLA C EMENT OF TH E PRODUCT I N QUESTION , A T SMC’S OPTI ON .
iii C OMPLIANCES FCC - C lass A This equi pm ent gener ates , uses , and can radiate rad io frequenc y energ y and, if not installed and used i n accordance wi th the inst r ucti on manual, may caus e interferenc e to radio communications .
C OMPLIANCES iv CE Mark Declaratio n of Conf or mance for EM I and Safety (EEC) SMC contact for these products in Europe is: SMC Netw or ks Europe , Edi fic io Conat a II, Calle Fr uctuós Ge laber t 6-8 , 2 o , 4 a , 08970 - Sant J oan Despí , Barcelona, Spain.
C OMPLIANCES v T aiw an BSMI Clas s A Australia A S/NZS 3548 (1995 ) - Class A SMC contact for products in Au stralia is: SMC Communic ations Pty . Ltd.
C OMPLIANCES vi Pow e r C o r d S a f e t y Please rea d the foll owing safety infor mation ca refully before i nstall ing the switch: WA R N I N G : Instal lati on and remov al of the unit must be car r ied out by qualified pe rsonn el only .
C OMPLIANCES vii V eui llez lire à fond l' inf or m ation de la sécuri té sui v ante av ant d'inst aller le Switch: A VE RTISSEMENT : L’instal lat ion e t la d épose de ce g roupe doiv e nt ê tre conf iés à un pers onnel qualifié.
C OMPLIANCES viii Bitte unbedingt v or dem Einbauen des Switches die f olgenden Sicherheitsanwei sungen durchlesen: WARNUNG: Die Inst al lati on und der A usba u des Geräts da rf nur durch Fachpersona l erfol g en. • Das Gerät so llte ni cht an eine ungee rdete W echse lstromst eck dose ang eschlo ssen werd en.
C OMPLIANCES ix W ar nings an d Cautionar y Me ssa ges En viron mental Statement The manufact urer of t his product en deavours to susta in an envir onmentall y-fr iend ly poli cy throughout the entir e produc tion pr ocess.
C OMPLIANCES x Pur pose This gui de de tail s the hardware f eatures of the switch, i ncluding It s physica l and perfor mance-rela ted char acterist ics, and how to install t he swi tch.
xi T ABLE OF C ONTENTS 1 About the TigerStack 10G . . . . . . . . . . . . . . . . . . . . . . 1-1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Switch Architec ture . . . . . . . . . . .
T ABLE OF C ONTENTS xii Installi ng an Optio nal SFP T ranscei ver int o the Switch . . . . . . . 3-7 Connec ting Switc hes in a Stack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8 Stacking T opolo gies . . . . . . . . . . . . . .
T ABLE OF C ONTENTS xiii A PPEN DICES : A Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A -1 Diagnos ing Switch I ndicator s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A -1 Power a nd Cooling Proble ms .
T ABLE OF C ONTENTS xiv.
xv T ABLES Table 1-1 Port Status LED s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 Table 1-2 Syst em Status L EDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 Table 3-1 Wiring Map for Se rial Cable . . . .
T ABLES xvi.
xvii F IGUR ES Figure 1-1 SMC8748M and SMC8724M Front Pane ls . . . . . . . . . . . 1-2 Figure 1-2 SMC8748M and SMC8724M Rear Panel . . . . . . . . . . . . . 1-2 Figur e 1-3 Port L EDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
F IGU RES xviii.
1-1 C HAPTER 1 A BO UT THE T IG ER S TACK 10G Overvi ew SMC’ s Tig erStack 10G SMC8724M and SMC8748M are intellig ent Layer 2 switches with 24/48 10/100/1000B ASE-T por ts , four of which are combin ation po r ts* that are shared with four SFP transcei v er slots (see Figure 1-1, P or ts 21~24/45~48).
A BOUT THE T IGE R S TAC K 10G 1-2 Figure 1-1 SMC8748M and SMC8724M Front Panels Figure 1-2 S MC8748M and SMC8724M Rear Panel Switch Architecture Th e switches employ a wire-speed, non -blocking swit c h ing fabric. This per mits simultaneous wire-s peed tran spor t of multiple packets at low latency on all por ts .
D ESCRIPTION OF H ARD WA R E 1-3 Management Opt ions These sw itches contain a comprehe nsi ve arra y of LEDs fo r “at-a-gla nce” moni toring of netw ork and po r t statu s . They al so includ e a management agent that allows you to configure or mo nitor the sw itch using its embe dded m anag eme nt soft ware, or v ia SNM P a pplic ations.
A BOUT THE T IGE R S TAC K 10G 1-4 SFP Slots The Small F or m F actor Plugg able (S FP) tr ansceiv er slots are shar ed with four of the RJ-45 ports (por ts 21 ~24 for the SMC8724M and por ts 45~48 for the SMC8748M).
D ESCRIPTION OF H ARD WA R E 1-5 Status LEDs Th e switch base unit also includes a display panel for key syst em and por t indic ations th at sim plify ins tallatio n and network troub les hoot ing . Th e LEDs , whic h are l ocated on t he front p anel for easy viewing , are sh own below and descr ibed in the following ta ble.
A BOUT THE T IGE R S TAC K 10G 1-6 Figure 1-4 System LEDs Table 1-2 System Status LEDs LED Condition Stat us Power Green Internal power is opera ting normally. Amber Internal powe r supply fau lt. Off Power off or failure. Diag Flashing Gree n System sel f-diag nostic t est in progress .
D ESCRIPTION OF H ARD WA R E 1-7 Stack Master Green Switch is ope rating as the Master unit in the sta ck. Amber Switch is ope rating as a Sla ve unit in the stack. Flashing Amber System in Ma ster arbi tration/ election state . Off System in standalone mode.
A BOUT THE T IGE R S TAC K 10G 1-8 Optional Redundant P ower Unit SMC su ppor ts an option al Redund ant P ower Un it (RP U), that ca n sup ply po wer to the sw itch in the ev ent o f failure of the in ter nal p ow er supply . Power Supply Receptacles There are t wo pow er receptacles on the re ar panel of each switc h.
F EATURES AND B ENEFITS 1-9 • IEEE 802.3 Ethernet, 802.3u Fast E thernet, 802.3z, 802.3ab Gigabit Ethernet, and 802.3ae 10 Gigabit Ethernet co m pliance ensures compat ibilit y wit h standa rds-ba sed hubs , netw ork card s and sw itches from any v endor .
A BOUT THE T IGE R S TAC K 10G 1-10.
2-1 C HAPTER 2 N ETWORK P LANNING Introd ucti on t o Swit chi ng A network swit c h allows s imultaneous transmis sion of multiple packe t s via non-cr ossbar sw itching . T his means that it can par tit ion a network more effi ciently than br i dges o r routers .
N ETWORK P LANNING 2-2 Applicat ion Examples Th e Ti ger Stack 10G is no t only designed to segmen t your network, but also to pr ovide a wide ra nge of op tions in sett ing up netw ork connect ions . Some typi cal application s are described b elow .
A PPL ICAT ION E XAM PLE S 2-3 Network Aggregation P lan With 24 or 48 parallel bridgin g por ts (i.e., 24 or 48 distinct collisio n domains), either of th e switches can collap se a comple x network down into a single efficient b ridg ed node, increasin g ov erall bandw idth and through put.
N ETWORK P LANNING 2-4 Remote Connections with Fiber Cable Fiber optic techn olog y allows for lo ng er c abli ng tha n any othe r med ia ty pe. A 1000B AS E-SX (MMF) lin k can connect to a site up to 550 meters awa y , a 1000B A SE-LX (SMF) link up to 5 km, and a 1000B A SE-ZX link up to 100 km.
A PPL ICAT ION E XAM PLE S 2-5 Makin g VL AN Conne ctio ns Th es e swit ches sup por t VLAN s which c an be u sed to org a ni ze an y g r oup of net w or k nod es int o se para te broa dc ast d omains . VL ANs c onfi ne broad cast tra ffic to th e origina ting g roup , and ca n elimin ate broad cast stor ms in la rg e networks .
N ETWORK P LANNING 2-6 Applic ation N otes 1. Full-duplex operatio n only applies t o point-to -point access (such as when a switch is atta ched to a w o rkstation, ser v er or ano t her sw it c h). When the switc h is co nnecte d to a hu b , both devi ces m ust opera te in half-duplex mo de .
3-1 C HAPTER 3 I NSTALLI NG THE S WITC H Selecting a Site Tig erStac k 10G units can b e mounted in a standard 19-inc h equipment rack or on a flat surface . Be sure to follow the guidelines below when c hoosing a location . ◆ The si te shou ld: • be at t he center o f all the de vices you wa nt to lin k and near a powe r outle t.
I NS TA LL I NG THE S WITCH 3-2 Ethe rnet Cabli ng T o ensure prop er operat ion when ins talling the switches into a n etw ork , mak e sure tha t the current cab l es are suitable for 10B ASE-T , 100B ASE-TX or 1000BASE-T ope ratio n.
E QUIPMEN T C HECKLIST 3-3 Equi pmen t Ch eckl ist After unpa ckin g the T ig erS t ack 10G u nit , check the cont en ts to be sur e y ou hav e recei ved all the c omponent s . T hen, before beg innin g the installation, be s ure y ou have all other necessar y installation equipm ent.
I NS TA LL I NG THE S WITCH 3-4 Mount ing A TigerStack 10G un it can be moun ted in a standa rd 19-inch equip ment rack or on a de skto p or s helf. Mou nting instr uctio ns fo r ea ch type of site follow .
M OUNTING 3-5 T o ra ck-mount dev ices : 1. At tach t he brac kets to th e device usi ng the s crews pr ovide d in the Bracket Mount ing Kit. Figure 3-2 Attaching the Brackets 2. Mount th e devic e in the ra c k, u sing fo ur rack-mount ing scre ws (no t provide d).
I NS TA LL I NG THE S WITCH 3-6 3. If installing a sin gle switch only , tur n to “Conn ecting to a P ow e r Sou rce” a t t he en d of this chapte r . 4. If installing multip le switches , mount the m in the rack, one below the othe r , in any or der .
M OUNTING 3-7 Installing an Optional SFP Tr ansceiver into the Switch Figure 3-5 Inserting an SFP Transceiver i nto a Slot The SFP s lots su pport th e follo wing o ptional SFP trans ceiv ers: • 100.
I NS TA LL I NG THE S WITCH 3-8 Conne cting Switch es in a Stack T o conn ect up to e ight sw itches in a st ack, perfo r m th e follow ing st e ps: 1. Plug o ne end o f the stac k cable (ordered separately) i n the Do wn (right) p or t of th e top unit.
C ONNECTING S WITC HES IN A S TAC K 3-9 5. Sel ect the Mas ter unit i n the stac k by p ressing th e push but ton in on only one of t he switc hes . Only one s witch in the s tack c an operate as the Master , all other un its ope rate in sl av e mo de.
I NS TA LL I NG THE S WITCH 3-10 Connect ing to a Power Sourc e T o conn ect a device to a po wer source: 1. Ins er t the p ow er cable pl ug direc tly into t he receptacl e located at the back of the d ev ice. Figure 3-7 Power Receptacle 2. Plug the oth er end of the cable i nto a grounded , 3-pin so cket .
C ONNECTING TO THE C ONSOLE P ORT 3-11 Conne cting to the Co nsole Po rt The DB-9 seria l port on the s witch ’ s front pan el is us ed to conn ect to the swit ch for ou t-of -band cons ole conf igurati on. The on-bo ard conf iguratio n prog ram can be acces sed from a ter min al or a PC r unn in g a ter min al emu latio n program.
I NS TA LL I NG THE S WITCH 3-12.
4-1 C HAPTER 4 M AKING N ETWORK C ONNECTI ONS Conne cting Network Devices Th e TigerStack 10G units are designed t o interconnect multiple segments (or collision domains) . It ca n be connec ted to n etw ork cards in PCs and ser v ers , as wel l as to hubs , swi tche s or ro uters .
M AKI NG N ETWORK C ONNECTIONS 4-2 Connecting t o PCs, Servers, H ubs and Switches 1. Att ach on e end of a twi ste d-pa ir ca bl e seg ment to th e de vic e’ s RJ-45 conn ect or .
T WISTED -P AI R D EV ICE S 4-3 Network Wiring Connections T oda y , th e punc h-do wn bloc k is a n integral part of many of t he new er equip ment r acks . It is actually par t of the patch pan el. In str uction s for making co nnec tion s in the wiri ng clo set w ith this ty pe of eq uip ment follows .
M AKI NG N ETWORK C ONNECTIONS 4-4 Fiber Optic SFP Devices An optional Gig abit SFP transcei ver (1000B ASE -SX, 1000B ASE-LX or 1000B ASE-ZX) can be used for a backb one connection between switches , or for conn ect ing to a hig h-spe ed se r ver . Each multimode fiber optic port requires 50/125 or 62.
F IBER O PT IC SFP D EV ICE S 4-5 3. Conn ect one end of the cable to t he LC port on the switc h and th e other end to th e LC port on the other devi ce. Si nce LC con nectors ar e ke yed, th e cable ca n be attac hed in on l y on e orien tation. Figure 4-3 Making LC Port Connections 4.
M AKI NG N ETWORK C ONNECTIONS 4-6 Connect ivity Ru les Wh en add ing hubs (rep eat ers) to your ne twork, pl ease f ollow the con nectivi ty r ules li sted in the man uals for these pro ducts .
C ONNEC TI VITY R ULES 4-7 100 Mbps Fast Ether net Collision Domain 10 Mbps Ethern et Collision D omain Table 4-3 Maximum 1000BASE-L X Fiber Optic Cable Length Fiber Diameter Fiber Ban dwidt h Cable Le ngth Range Connector 9/125 mic ron single-m ode fiber N/A 2 m - 5 k m (7 ft - 3.
M AKI NG N ETWORK C ONNECTIONS 4-8 Cable L abeling and Con nection Rec ords Whe n planning a network installation, it is es sential to label th e opposing ends of cable s and to record where each cable is con nected.
A-1 A PPENDI X A T ROUBLESHOOTING Diagnosi ng Switch Indic ators Table A-1 Tr oubleshooting Chart Symptom Act ion Power LED is Off • Check con nections between the switch, the power cord, and th e wall outlet. • Contact you r dealer for as sistance.
T R OUBLESHOOTING A-2 Power and Coolin g Problems If the power ind icato r does not tur n on when the power cor d is plug g ed in, y ou ma y hav e a p roblem w ith the p ow er outl et, po wer c ord, or internal power supply .
I N -B AND A CCE SS A-3 In-Ban d Access Y ou can acce ss the m anagement agent in the swit ch from anywhere w ithin the a ttach ed network u sing T e lnet , a W eb b rowse r , or o ther network mana g em ent so ftwar e too ls . H owever, you must fir st co nfi gur e th e swi tch with a v alid IP address , subnet mas k, and default g atewa y .
T R OUBLESHOOTING A-4 cab le is disc onne cte d, th e en tire s tack re boot s and res um es no r m al opera tion and manag e ment usin g line-t opolo g y stacking thr ou gh the rema ini ng sta ck conn ec tion s . Als o , any chang e s to th e s tack inc lu ding powering down of a unit or the inse r t ion of a unit causes the stack to rebo ot.
B-1 A PPEND IX B C ABLES Twi sted-Pair Ca ble and Pin Assi gnments F or 10B ASE-T/100B ASE-TX co nnections , a tw isted-pair cable must hav e two pairs of wires . F or 1000B A SE-T connections the twisted-pair cable mus t ha ve four pairs of wires . Eac h wire pair is identified by tw o differen t color s .
C AB LES B-2 10BASE-T/100BASE-TX Pin A ssignments Use unshield ed twisted-p air (UTP) or s hielded twiste d-pair (STP) ca ble for RJ-45 connections: 100-ohm Categ or y 3 or better cable for 10 Mbps connectio n s , or 100-ohm Categor y 5 or better cable for 100 Mbp s or 1000 Mbps connections .
T WISTED -P AI R C AB LE AND P IN A SSIGNMENTS B-3 Fi gure B -2 S trai g ht-t h rou gh Wi rin g Cros sover W iring If the twis ted-pair cable is to join two por ts and either bo th por ts are labeled with an “X” (MDI-X) or ne ither p or t is labeled with an “X” (MDI) , a cr ossover must be implem ente d in the wi ring .
C AB LES B-4 1000BASE-T Pin As signments All 1000B AS E-T por ts suppor t automatic MDI/M DI-X operation, so y o u can use st raight- throug h cables for all ne tw ork connect ions to PCs or ser v ers , or t o other s witch es or hubs . The table below shows the 1000B ASE -T MDI and MDI-X por t pinouts .
T WISTED -P AI R C AB LE AND P IN A SSIGNMENTS B-5 1000B ASE-T is a simp le test of the c ab le installation to be sure that it complies with the IEEE 802.3ab standards . Cable Testing for Existing Category 5 Cable Installed Categ or y 5 c abling must pass tes ts for Attenuation, Near-End Cros s talk (NEXT), an d F ar- End Crosstalk (FEXT) .
C AB LES B-6 Fiber Stan dards Th e current TIA (T elecommu n ications Industr y As sociation) 568-A specificatio n on optic al fiber cablin g consist s of on e recognized cab le type for ho rizo ntal su bsy tems and two cable type s for b ackbon e su bsys tems .
C-1 A PPENDI X C S PECIFI CATIO NS Physical Chara cteristics P or t Configuration SMC8724M 20 10/100/1000B ASE-T , with auto-nego tiation 4 10/100/1000B ASE-T shared with 4 SFP transcei ver slots .
S PE CIFIC AT IONS C-2 LEDs System: P ow er (P o wer Supply), Diag (Dia gnostics ), RPU (Re dundant P ow er Unit), S tac k Master , Stack L ink, Module P o rt : Status (l ink, spee d, activity) We i g h t SMC8724M: 6.08 kg (13 .4 lbs) SMC8748M: 6.36 kg (14 .
S WITCH F EAT UR ES C-3 Swit ch Featu res F orw arding Mode Store-an d-forward Throughput Wire sp eed Flo w Co ntro l Full Duplex: IEEE 802.3x Half Duple x: Back pr essure Manage ment Fea tur es In-Ba.
S PE CIFIC AT IONS C-4 Compliance s CE Mar k Emissi ons FCC Clas s A Indu str y C anada Cla ss A EN55022 (CISPR 22) Class A EN 61000-3-2/3 V CCI Class A C-Tick - A S/NZS 3548 (1995) Class A Immunity EN 61000-4-2/3/4/5/6/8/11 Safety CSA/NRTL (CSA 22.2.
D-1 A PPEND IX D O RDERING I NFORMATION TigerStack 10G Products and Accessorie s Product Numb er Descr iption SMC8748M 48 10/100/1000BASE-T ports swi tch with four Gigabit combinat ion ports with RJ-4.
O RDER ING I NFOR MATION D-2.
Glossary-1 G LO SSARY 10BASE-T IEEE 802.3 specification for 10 M bps Ethernet ov er two pa irs of Ca teg or y 3 o r better UTP ca ble . 100BASE-TX IEEE 802.3u specification for 100 Mbps F ast Ether net o ver tw o pairs of Ca teg or y 5 o r better UTP ca ble .
G LOSSAR Y Glossary-2 Bandwidth The differ ence bet ween t he high est a nd low est frequencie s av aila ble f or network sign als . A lso sy nonymo us w ith wir e spe ed, the actu al s peed o f the da ta tr ansmi ssion a long the cab le . Coll isio n A co ndition i n whic h pac kets transm itted o ver t he cabl e interfere with ea ch other .
G LOSSAR Y Glossary-3 Gigabit Ethernet A 1000 Mbps network c ommunication system based on Ethern et and the CSMA/CD access method. Full Duplex T ransmi ssio n method that al lows two netw or k device s to tr ansmit a nd recei v e concurrently , effect iv ely do ubling the band width of that li nk.
G LOSSAR Y Glossary-4 LED Light emi tting d iode u sed for mon ito ring a devic e or network cond ition. Local Area Network A group o f inter connected comput ers and supp ort devices .
G LOSSAR Y Glossary-5 TIA T elecommunication s Industr y Associatio n Transmission Control Protocol/Internet Protocol (TCP/ IP) Proto col su ite t hat in cl udes TC P as t he pr imar y trans por t prot ocol, an d IP as t he netw ork l ayer pr otoc ol.
G LOSSAR Y Glossary-6.
Index-1 Numeri cs 10 Mbps conne ctivity rules 4-7 1000BASE-LX fiber cable le ngths 4-7 1000BASE-SX fiber cable le ngths 4-6 1000BASE-T po rts 1-3 1000BASE-ZX fiber cable le ngths 4-7 100BASE cable len.
I ND EX Index-2 problems A-2 rack mounting 3-4 RPU in racks 3-6 site requirements 3- 1 wiring c loset co nnecti ons 4-7 L laser safe ty 4-4 LED indicators Diag 1-6 Link 1-5 Module 1-7 Power 1-6 proble.
I NDEX Index-3 surge supp ressor, using 3-1 switch a rchitecture 1-2 switching, introductio n to 2-1 T temperature within a rack 3- 4 trouble shooti ng in-ba nd acces s A -3 power and cooling problems.
I ND EX Index-4.
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38 T es la Irvi ne, CA 92 618 Phone : (949) 679-8 000 Model N umbers: SMC872 4M, SMC8748 M Pub . Nu mber: 1502 000489 00A E 102004 -R01 FOR TECHNICAL SUPPOR T , CALL: From U. S.A. and Ca nada (2 4 hours a day , 7 days a week) (800) SMC- 4-YOU; (949) 679 -8000; F ax: (949) 679- 1481 Fro m Eur ope: Cont act de tail s ca n be f ound on www .
An important point after buying a device SMC Networks SMC TigerCard 10G (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought SMC Networks SMC TigerCard 10G yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data SMC Networks SMC TigerCard 10G - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, SMC Networks SMC TigerCard 10G you will learn all the available features of the product, as well as information on its operation. The information that you get SMC Networks SMC TigerCard 10G will certainly help you make a decision on the purchase.
If you already are a holder of SMC Networks SMC TigerCard 10G, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime SMC Networks SMC TigerCard 10G.
However, one of the most important roles played by the user manual is to help in solving problems with SMC Networks SMC TigerCard 10G. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device SMC Networks SMC TigerCard 10G along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
