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Table of contents for the manual
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Enterasys ® Secur eStack ™ C3 PoE Gigabit Ether net Switches Hardware Installation Guide C3G124-24P C3G124-48P P/N 9034277-0 2 7.5x9-inch cover with bleed on 4 sides[...]
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[...]
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i Notice Enterasys Networks reserv es the right to make changes in specifica tions and other information contained in this document and its web site without prior notice. The reader should in all cases consult Enterasys Netw orks [...]
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ii REGULATORY COMPLIANCE INFORMATION FEDERAL COMMUNICATIONS CO MM ISSION (FCC) NOTICE This device com plies with Pa r t 15 of the FCC rules. Operation is su bject to the foll owing two conditions: (1) this device may not cause harmful interference, ?[...]
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iii ELECTROMAGNETIC COMPATIBILITY (EMC) This product complies with the following: 47 CF R Pa r t s 2 and 15, CSA C108.8, 89/336/EEC, EN 55022, EN 6100 0 ‐ 3 ‐ 2, EN 61000 ‐ 3 ‐ 3, EN 55024, AS/NZS CISPR 22, VCCI V ‐ 3. COMPATIBILIDA[...]
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iv ѻ ѻ ક䇈ᯢк䰘ӊ Supplement to Product Instructions ᳝↦᳝ᆇ⠽䋼ܗ㋴ (Hazardous Substance) 䚼ӊৡ⿄ (Parts) 䪙 3E ∲ +J 䬝 &G ݁Ӌ䫀 &U ⒈㘨㣃 3%% ⒈Ѡ㣃䝮 3%'( 䞥ሲ䚼ӊ (Metal Parts) hƻ ƻ ƻ ƻ ƻ ⬉䏃ഫ ( Circuit[...]
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v VCCI NOTICE This is a class A product based on the standard of the Vo l u n t a r y Control Co uncil for Interferen ce by Information Te c h n o l o g y Equipment (VCCI). If this equipmen t is used in a dom estic environment , ?[...]
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vi DECLARATION OF CONFORMITY Application of Co uncil Directiv e(s): 89/336/EEC 73/23/EEC Manufacturer’s Na me: Enterasys Networks, Inc. Manufacturer ’ s Address : 50 Minuteman Road Andover, MA 01810 USA European Representativ e Address: Enterasys Networks, Ltd. Nexus House, Newbury Bus[...]
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vii ENTERASYS NETWORKS, INC. FIRMWARE LICENSE AGREEMENT BEFORE OPENING OR UTILIZING THE ENCL OSED PRODUCT , CAREFULL Y READ THIS LICENSE AGREEMENT . This document is an agreement (“ Agreement”) betwee n the end user (“Y ou”) and Enterasys Networks, Inc. [...]
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viii 3. APPLICABLE LAW. This Agreem ent shall be interpreted and governed under the laws and in the state and federal cour ts of the Commonwealth of Massachusetts without regard to its conflicts of laws provisions. You acc[...]
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ix 8. AUDIT RIGHTS. You here by acknowl edge that the intellectual property rights associated with the Program are of critical value to Enterasys and, accordingly, You hereby agree to maintain complete books, records and accounts [...]
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x[...]
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ii REGULATORY COMPLIANCE INFORMATION FEDERAL COMMUNICATIONS CO MM ISSION (FCC ) NOTICE This device com plies with Pa r t 15 of the FCC rules. Operation is subjec t to the following two conditions: (1) this device may not cause harmful interference, ?[...]
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iii ELECTROMAGNETIC COMPATIBILITY (EMC) This product complies with the following: 47 CF R Pa r t s 2 and 15, CSA C108.8, 89/336/EEC, EN 55022, EN 6100 0 ‐ 3 ‐ 2, EN 61000 ‐ 3 ‐ 3, EN 55024, AS/NZS CISPR 22, VCCI V ‐ 3. COMPATIBILIDA[...]
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iv ѻ ѻ ક䇈ᯢк䰘ӊ Supplement to Product Instructions ᳝↦᳝ᆇ⠽䋼ܗ㋴ (Hazardous Substance) 䚼ӊৡ⿄ (Parts) 䪙 3E ∲ +J 䬝 &G ݁Ӌ䫀 &U ⒈㘨㣃 3%% ⒈Ѡ㣃䝮 3%'( 䞥ሲ䚼ӊ (Metal Parts) hƻ ƻ ƻ ƻ ƻ ⬉䏃ഫ ( Circuit[...]
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v VCCI NOTICE This is a class A product based on the standard of the Vo l u n t a r y Control Co uncil for Interference by Information Te c h n o l o g y Equipment (VCCI). If this equipmen t is used in a dom estic environment , ?[...]
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vi DECLARATION OF CONFORMITY Application of Co uncil Directiv e(s): 89/336/EEC 73/23/EEC Manufacturer’s Na me: Enterasys Networks, Inc. Manufacturer ’ s Addre ss: 50 Minuteman Road Andover, MA 01810 USA European Representativ e Address: Enterasys Networks, Ltd. Nexus House, Newbury Bus[...]
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vii ENTERASYS NETWORKS, INC. FIRMWARE LICENSE AGREEMENT BEFORE OPENING OR UTILIZING THE ENCL OSED PRODUCT , CAREFULL Y READ THIS LICENSE AGREEMENT . This document is an agreement (“ Agreement”) betwee n the end user (“Y ou”) and Enterasys Networks, Inc. [...]
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viii 3. APPLICABLE LAW. This Agreem ent shal l be interpreted and governed under the laws and in the state and federal cour ts of the Commonwealth of Massachusetts with out regard to its conflicts of laws provisions. You a[...]
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ix 8. AUDIT RIGHTS. You here by acknowl edge that the intellectual property rights associated with the Program are of critical value to Enterasys and, accordingly, You hereby agree to maintain complete books, records and accounts [...]
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x[...]
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xi Contents About This Guide Who Should Use This Guide . ................. ............. ................ ............. ................ ............. ............ .......... xv How to Use This Guide ................ ............. ................ ............. ................ ............. ................ .. ............. xvi Related Documents .[...]
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xii Rack Mounting the Switch ....... ............. ................ ............. ................ ............. ................ ....... ........... 3-9 Guidelines for Rackmount Insta llat ion ................ ............. ................ ................ ............. ............... 3-9 Attaching Brackets and Installin g in Rack ..............[...]
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xiii Figures 1-1 C3G124-24P Stackable Switch ........................... ................. ................... ................ ............... 1-2 1-2 C3G124-48P Stackable Switch ........................... ................. ................... ................ ............... 1-4 3-1 Mini-GBIC with MT-RJ Connec tor . ............. ...............[...]
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xiv[...]
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SecureStack C3 Installation Guide xv About This Guide This guide provides an ov erview , insta llation and troubleshooting instructions, and specifications for the Enterasys ® SecureStack C3G124 ‐ 24P and C3G124 ‐ 48P stackable PoE Gigabit Ethernet switches[...]
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How to Use This Guide xvi About This Guide How to Use This Guide Read through this guide completely to familiarize you rs el f with its contents and gain an understanding of the features and capabilities of the stackable Ethernet switch. A genera[...]
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Conventions Used in This Guide SecureStack C3 Installation Guide xvii Conventions Used in This Guide The following conventions are used in this guide: Note: Calls the reader ’s attention to any item of information that may be of special import ance. Caution: Contains information essential to avoid damage to the equipme[...]
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Getting Help xviii About This Guid e Getting Help For additional support related to the product or this document, contact Enterasys Networks using one of the follow ing methods: Before contacting Enterasys Networks for technical support, have the fol[...]
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SecureStack C3 Insta llation Guide 1-1 1 Introduction This chapter introduces the C3G124 ‐ 24P and C3G124 ‐ 48P Po E Gigabit Ethernet stackable switches. Overview The C3G124 ‐ 24P and C3G124 ‐ 48P ar e stackable switches that can be adapted and scale[...]
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Overview 1-2 Introduction •F o u r SFP slots that provide you with the option of installing Small Form Plugga ble (SFP) Mini ‐ GBICs for 1000BASE ‐ SX/LX fi ber ‐ optic connections and 1000BAS E ‐ T copper connections. •R e a r panel conn[...]
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Overview SecureStack C3 Insta llation Guide 1-3 C3G124-48P S t ackable Switch The C3G124 ‐ 48P ( Figure 1 ‐ 2 ) has sev eral types of front panel port connections, whi ch include: •F o r t y ‐ eight RJ45 ports (10/100/1000 Mbps, 1000BASE ‐ T copper ports) that[...]
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Overview 1-4 Introduction Figure 1-2 C3G124-48P S t ackable Switch High-S peed St ack Connections The switches hav e rea r ‐ panel connectors for high ‐ speed connections in a stack configuration. The high ‐ speed stacking cables used for the connections are o[...]
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PoE (Power over Ethernet) Support SecureStack C3 Insta llation Guide 1-5 PoE (Power over Ethernet) Support The switch is 802.3af compliant, which means it can provide powe r over Ethernet cable connections from its 48, RJ45 front panel con nectors to PDs [...]
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Connectivity 1-6 Introduction Connectivity The switch connects to Ethernet netw orks or workstations through the fixed front panel RJ45 connectors and four uplink ports that support optional Mini ‐ GBICs. At the time of this print ing, [...]
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Management SecureStack C3 Insta llation Guide 1-7 Management Management of the sw itch can be either in ‐ band or out ‐ of ‐ band. In ‐ band remote management is possible us ing Te l n e t , Enterasys N etworks’ NetSight ® man agement application, or [...]
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LANVIEW Diagnostic LEDs 1-8 Introduction LANVIEW Diagnostic LEDs LANVIEW diagnostic LEDs serv e as an important troubleshooting aid by providing an easy wa y to observe the status of i ndividual ports and ov erall network operations. Refer to “[...]
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SecureStack C3 Insta llation Guide 2-1 2 Network Requirements Before inst alling the switch, review the requirements and specifications in this chapter concerning the following: Note: All RJ45 connectors support Po E connections from network PDs (Powered Devices). For information about... Refe[...]
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10BASE-TX Network 2-2 Network Requir ements 10BASE-TX Network When connecting a 10BASE ‐ TX segment to one of the RJ45 fixed ports on both the C3G124 ‐ 24P and the C3G124 ‐ 48P, ensure that the networ k meets the Ethernet network requir[...]
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SecureStack C3 Insta llation Guide 3-1 3 Hardware Installation This chapter provides the instructions to install the C3G124 ‐ 24P or C3G124 ‐ 48P. Unless otherwise noted, the instructions apply to both switches. Follow the order of the sections ?[...]
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Considerations Prior to Installation 3-2 Hardware Installation Considerations Prior to Inst allation When installing the switch, note the following: •B e f o r e starting the installation procedure, notify the network administrator of the installation. •F o l l o w the [...]
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Installing Optional Mini-GBICs SecureStack C3 Insta llation Guide 3-3 Inst alling Optional Mini-GBICs This section describes how to install Mini ‐ GBICs in any of the SFP port slots . It is recommended that the options be in stalled first in a new [...]
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Installing Optional Mini-GBICs 3-4 Hardware Installation Inst alling a Mini-GBIC To install a Mini ‐ GBIC that has an MT ‐ RJ connector , refer to Figure 3 ‐ 1 , or for a Mini ‐ GB IC with an LC connector, refe r to Figure 3 ‐ 2 , and proceed ?[...]
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Installing Optional Mini-GBICs SecureStack C3 Insta llation Guide 3-5 Figure 3-2 Mini-GBIC with LC Connector Removing a Mini-GBIC To remove a Mini ‐ GBIC from a port sl ot, refer back to Figure 3 ‐ 1 and Figure 3 ‐ 2 , and proceed as follows: 1 Mini-GBIC (MGBIC-LC01, -LC03, or -L[...]
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Installing the Switch on a Flat Surface 3-6 Hardware Installation 1. Attach you r antistatic wrist strap (refer to the instructions in your antistati c wrist strap package) before removing the Mini ‐ GBIC. 2. Remove the cables connected to the Mini ‐[...]
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Installing the Switch on a Flat Surface SecureStack C3 Insta llation Guide 3-7 Figure 3-3 Chassis Bottom, Rubber Feet Placement 4. Remove the protectiv e strip from the back of one rubber foot and position it on a marked location and press firmly into place. [...]
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Installing the Switch on a Flat Surface 3-8 Hardware Installation Guidelines for Flat Surface Inst allation Locate the switch within 152 cm (5 ft) of its pow er source and on a surface as shown in Figure 3 ‐ 4 . If an optional redundant pow er syst[...]
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Rack Mounting the Switch SecureStack C3 Insta llation Guide 3-9 Rack Mounting the Switch To install the switch in a 19 ‐ inch rack, you need: •T w o rackmount brackets and mounting screws shipped with the switch . •F o u r user ‐ supplied screws to a[...]
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Rack Mounting the Switch 3-10 Hardware Installa tion Figure 3-5 Att aching the Rackmount Bracket s 2. With the mou nting brackets attached, position the switch between the vert ica l frame members of the 19 ‐ inch rack as shown in Figu re 3 ‐ 6 . Then fasten[...]
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Connecting High-Speed Stacking Cables SecureStack C3 Instal lation Guide 3 -11 Connecting High-S peed St acking Cables The stack of switches can be connected in a ring or dais y chain topology . In a ring topology all the switches ar e connected. The onl[...]
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Configuring Switches in a Stack 3-12 Hardware Installa tion Figure 3-7 High-S peed St acking Cable Connections After connecting the cables to the stacking ports, proceed to “ Connecting AC and Po E Po we r ” on page 3 ‐ 15 for instructions. Configuring Switches in a S t a[...]
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Configuring Switches in a Stack SecureStack C3 Instal lation Guide 3 -13 Once installed in a stack, the switches behav e and perform as a si ngle switch. As such, yo u can start with a single switch and add more switches as your netwo[...]
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Configuring Switches in a Stack 3-14 Hardware Installa tion Recommended Procedures to In st all New and Existing St acks Inst alling a New St ackable Syst em of Up to Eight Switches Use the following procedure to install a new stack of up to eight switches out of the box. Befor[...]
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Connecting AC and PoE Power SecureStack C3 Instal lation Guide 3 -15 2. Use one of the following methods to complete the stack cable connections: –I f the running stack uses a daisy chain topology , mak e the stack cable conne ctions from the ?[...]
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Connecting AC and PoE Power 3-16 Hardware Installa tion Figure 3-8 Connecting AC Power and RPS 3. Observe the pow er CPU LED (not shown) located on the front pa nel. During the initialization, the CPU LED will start by illuminating sol id amber, then [...]
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Connecting AC and PoE Power SecureStack C3 Instal lation Guide 3 -17 PoE Redundant Power System If you are connecting an optional PoE redundant power supply (C2RPS ‐ POE), refer to the installation instructions supplied with the Secure Stack C2RPS ‐ POE. The [...]
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Connecting to Console Port for Local Management 3-18 Hardware Installa tion Connecting to Console Port for Local Management This section describes how to install an RS232 DTE interface cable to a PC, a VT series terminal, or a modem to a C3G124 ‐ 24P o[...]
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Connecting to Console Port for Local Management SecureStack C3 Instal lation Guide 3 -19 Figure 3-9 DB9 Male Console Port Pinout Assignme nts Connecting to an IBM or Comp atible Device To connect an IBM PC or compatible device, running the VT termin al emulation, to a switch Console ?[...]
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Connecting to Console Port for Local Management 3-20 Hardware Installa tion Figure 3-10 Connec ting an IBM PC or Compatib le Connecting to a VT Series T erminal To connect a VT Series terminal to a switch Console port ( Figure 3 ‐ 11 ), use a UTP serial interface cable termin[...]
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Connecting to Console Port for Local Management SecureStack C3 Instal lation Guide 3 -21 Figure 3-1 1 Connecting a VT Series T erminal Connecting to a Modem To connect a modem to a switch modem port ( Figure 3 ‐ 12 ), use a UTP cable terminated with a DB9 female connector[...]
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Connecting to the Network 3-22 Hardware Installa tion Figure 3-12 Connec ting to a Modem Connecting to the Network The following procedures cover the cable connections from the ne twork or other devices to the switch RJ45 ports or any installed optional Mini ‐[...]
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Connecting to the Network SecureStack C3 Instal lation Guide 3 -23 Figure 3-13 Connec ting a UTP Cable Segment to RJ45 Port 3. V erify that a link exists by ch eckin g that the Link/Activity LED is ON (solid green or blinking green). 4. If the Link/Activity LED is ?[...]
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Page 63
Connecting to the Network 3-24 Hardware Installa tion Figure 3-14 Four-W ire Crossover Cable RJ45 Pinout s for 10/100BASE-TX Figure 3-15 Four-W ire Straight-Through Cable RJ45 Pinouts for 1 0/100BASE-TX 1 RJ45 switch port 3 RJ45-to-RJ45 crossover cable 2 Other device port 4 RX+/RX- and TX+/TX-connecti ons These connections must share a common color[...]
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Page 64
Connecting to the Network SecureStack C3 Instal lation Guide 3 -25 Figure 3-16 Eight- Wire Crossover Cabl e RJ45 Pinout s for 10/100/1000BASE-TX Figure 3-17 Eight- Wire Straig ht-Through Cable RJ45 Pinout s for 10/100/ 1000BASE-TX 1 RJ45 device port 3 RJ45-to-RJ45 crossover c able 2 Other device port 1 RJ45 device port 3 RJ45-to-RJ45 straight-th ro[...]
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Page 65
Connecting to the Network 3-26 Hardware Installa tion Connecting Fiber-Optic Cab les to MT -RJ Port s This section contains the procedures for connecting a 1000BA SE ‐ SX multimo de fiber ‐ optic segment from the network or other devices to an MT ‐ RJ port [...]
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Page 66
Connecting to the Network SecureStack C3 Instal lation Guide 3 -27 2. Insert the MT ‐ RJ cable connector into the MT ‐ RJ connector unti l it clicks into place. Figure 3-18 Cable Co nnection to MT -RJ Multimode Fiber-Optic Connectors 3. Plug the other end of the cable ?[...]
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Connecting to the Network 3-28 Hardware Installa tion If a link has not been established, re fer to Chapter 4 for LED troubleshooting det ails. If a problem persists, refer to “ Getting Help ” on page xviii for details on contacting ?[...]
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Page 68
Connecting to the Network SecureStack C3 Instal lation Guide 3 -29 1. Remove the protectiv e covers (not shown) from the front panel LC fiber ‐ optic port (port 46 in this example) and from the connectors on each end of the cable. 2. Insert[...]
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Page 69
Completing the Installation 3-30 Hardware Installa tion a. V erify that the device at the other end of the segment is ON and connected to the segment. b. If there are separate fiber ‐ optic connections on the other device, check the [...]
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Page 70
SecureStack C3 Insta llation Guide 4-1 4 T roubleshooting This chapter provides information concerning the following: This device contains a battery that is not considered a user replaceable part. If the battery needs to be replaced, contact [...]
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Using LANVIEW 4-2 Troubleshooting Figure 4-1 C3G124-24P LANVIEW LEDs 1 CPU LED 6 Link/Activity/PoE LED for 10/100/1000 Mbps, RJ45 port 1 2 ST ACK DOWN LED 7 Link/Activity/PoE LEDs for 10/100/1000 Mbps 3 ST ACK UP LED RJ45 ports 21 through 24 4 RPS LED for redundant power source status 8 Link/Activity LEDs for 1-Gbps Mini-GBIC ports 21 through 2[...]
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Page 72
Using LANVIEW SecureStack C3 Insta llation Guide 4-3 Figure 4-2 C3G124-48P LANVIEW LEDs Ta b l e 4 ‐ 1 describes the LED indications and provides recommended actions as appropriate. 1 CPU LED 5 Manager LED 2 ST ACK DOWN LED 6 Link/Activity LEDs for 10/100/1000 Mbps RJ45 3 ST ACK UP LED ports 1 through 48 4 [...]
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Page 73
Using LANVIEW 4-4 Troubleshooting T able 4-1 LANVIEW LED Diagnostic Indications LED Color State Recommended Action CPU Off Power disconnected. If the LED rema ins off after connecting AC power or DC power from an RPS, check the following: 1. Make sure there is power at the power source (AC source and RPS if applicable). 2. Replace the power cord wi[...]
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Page 74
Using LANVIEW SecureStack C3 Insta llation Guide 4-5 UP Off No val id connection to switch stack down connector . 1. M ake sure the switch connected to the stack down connector is powered on. 2. Replace cable with a known good one. 3. If the problem still exist s, contact Enterasys Networks for technical support. Green Solid. V alid connection to s[...]
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Page 75
Using LANVIEW 4-6 Troubleshooting Link/ Activity (RJ45 PoE ports) Off 1. No link. 2. No activity or port in standby . 3. The port is deactivated because the Mini-GBIC port with the same port number is linked. None. None. None. Green Solid. Port is linked, but the interface is not receiving any traffic. PoE power is available. None. Blinking. Port i[...]
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Troubleshooting Checklist SecureStack C3 Insta llation Guide 4-7 T roubleshooting Checklist If the device is not work in g properly , refer to Ta b l e 4 ‐ 2 for a checklist of problems, possible causes, and recommended actions to resolve the problem. T ab[...]
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Page 77
Using the Reset Switch 4-8 Troubleshooting Using the Reset Switch If you forget the switch login passw ord, use the Reset switch to reset th e login password to the default password, as described in the following procedure. Figure 4-3 Reset Switc[...]
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Page 78
Using the Reset Switch SecureStack C3 Insta llation Guide 4-9 To reset the switch password, re fer to Figure 4 ‐ 3 and proceed as follows: 1. Press ‐ and ‐ hold the Reset switch while the switch device is operational. This change of the login ?[...]
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Page 79
Using the Reset Switch 4-10 Troubleshooting[...]
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SecureStack C3 Installation Guide A-1 A Specifications This appendix provides information about the foll owing: Enterasys Networks reserves the right to change the specifications at any time without notice. Switch S pecifications Ta b l e A ‐ 1 provides the I/O ?[...]
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Page 81
Switch Specifications A-2 Specifications C3G124-48P RJ45 ports 1 through 48 Forty-eight, 10BASE-T/100BASE-TX/1000BASE-T compli ant ports with auto-sensing and auto-negotiation via RJ45 connectors. These ports also support 802.3af PoE connections. SFP ports 45 through 48 Four slots that s upport optional Mini-GBICs for 100 0BASE-FX fiber-optic c[...]
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Page 82
Mini-GBIC Input/Output Specifications SecureStack C3 Installation Guide A-3 Mini-GBIC Input/Output S pecifications The Mini ‐ Gigabit Interface Card (Mini ‐ GBIC) port interface slots can support 1 ‐ Gbps fiber ‐ optic and copper connections as described in Ta b l e A ?[...]
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Page 83
Gigabit Ethernet Specifications A-4 Specifications Gigabit Ethernet S pecifications The following specificat ions for the Mini ‐ GBICs shown in Ta b l e A ‐ 3 through Ta b l e A ‐ 10 meet or exceed the IEEE 802.3z ‐ 1998 standard. MGBIC-LC01/MGBIC-MT01 S pec ifications (100[...]
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Page 84
Gigabit Ethernet Specifications SecureStack C3 Installation Guide A-5 MGBIC-LC03 S pecific ations (1000BASE-SX) MGBIC-LC09 S pecific ations (1000 BASE-LX) T able A-5 MGBIC-LC03 Opt ical Specific ations Item 62.5/125 µm MMF 50/125 µm MMF T ransmit Power (minimum) -9.5 dBm -9.5 dBm T ransmit Power (maximum) -3 dBm -3 dBm Receive Sensitivity -20 dBm[...]
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Gigabit Ethernet Specifications A-6 Specifications MGBIC-08 Specificati ons (1000BASE-ELX) MGBIC-02 Specifications (1000BASE-T) T able A-9 MGBIC-08 Optical S pecificatio ns Item T ransmit Power (minimum) -0 dBm, min. +2 dBm, typical +5 dBm, max. Receive Sensitivity -24 dBm, min. -26 dBm, typical Maximum Input Power -3 dBm Link Power Budget 1 (Full [...]
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Page 86
Console Port Pinout Assignments SecureStack C3 Installation Guide A-7 Console Port Pinout Assignment s The Console port is a DB9 serial communications port for local access to Local Management. Refer to Figure A ‐ 1 for the Console port pin assignments. Fi[...]
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Page 87
Regulatory Compliance A-8 Specifications[...]
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Page 88
Index-1 Index Numerics 1000BASE-FX network connections requirements for 2-2 1000BASE-T requirements for 2-2 100BASE-T requirements 2-2 10BASE-T connection 3-22 requirements 2-2 A AC input specifica tions specifications AC input A-3 AC power connecting to 3-15 C C3G124-24P stackable switch introduction to 1- 1 C3G124-48P stackable switch introductio[...]
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Page 89
Index-2 Mini-GBIC input/outputs specifications for A-3 P PD (Powered Device) introduction to 1-5 PDC (Powered Device Classification) introduction to 1-5 list of 1-5 Pinout assignments console port A-7 UTP 4-wire crossover cable 3-24 UTP 4-wire straight-through cable 3-24 UTP 8-wire crossover cable 3-25 UTP 8-wire straight-through cable 3-25 PoE (Po[...]