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Enterasys A2H124-24FX - page 1
7.5x9-inch cover with bleed on 4 sides Secur eStack A2 Fast Ether net Switches Hardware Installation Guide A2H124-24FX P/N 9034174-0 1 ...
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Enterasys A2H124-24FX - page 2
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i Notice Enterasys Networks reserv es the right to make changes in specifica tions and other information containe d in this document and its web site without prior notice. The reader should in all cases consult Enterasys Ne tworks ...
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Enterasys A2H124-24FX - page 4
ii REGULATORY COMPLIANCE INFORMATION FEDERAL COMMUNICATIONS CO MMISSION (FCC) NOTICE This device co mplies with Pa rt 15 of the FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmfu l interference, ...
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Enterasys A2H124-24FX - page 5
iii ELECTROMAGNETIC COMPATIBILITY (EMC) This product complies with the follo wing: 47 CFR Pa rt s 2 and 15, CSA C108.8, 89/336/EEC, EN 55022, EN 61000 ‐ 3 ‐ 2, EN 61000 ‐ 3 ‐ 3, EN 55024, AS/NZS CISPR 22, VCCI V ‐ 3. COMPATIBILIDAD ...
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iv ...
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v VCCI NOTI CE This is a class A product based on the standard of the Vo l u n t a r y Cont rol Counc il for Interference by Information Te c h n o l o g y Equipment (VCCI). If this equipmen t is used in a domestic environment, ? ...
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Enterasys A2H124-24FX - page 8
vi DECLARATION OF CONFORMITY Application of Co uncil Directi ve(s): 89/336/EEC 73/23/EEC Manufacturer’s Na me: Enterasys Networks, Inc. Manufacturer ’ s Address: 50 Minuteman Ro ad Andover, MA 01810 USA European Representativ e Address: Enterasys Networks, Ltd . Nexus House, Newbury Bu ...
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Enterasys A2H124-24FX - page 9
vii ENTERASYS NETWORKS, INC. FIRMWARE LICENSE AGREEMENT BEFORE OPENING OR UTILIZING THE ENCLOSED PRODUCT , CAREFULL Y READ THIS LICENSE AGREEMENT . This document is an agreement (“ Agreement”) betwee n the end user (“Y ou”) and Enterasys Network s, Inc. ...
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Enterasys A2H124-24FX - page 10
viii 3. APPLICABLE LAW. This Agreem ent shall be interpret ed and governed under the laws and in the state and federal cour ts of the Commonwealth of Massachusetts wit hout regard to its conflicts of laws prov isions. You ...
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Enterasys A2H124-24FX - page 11
ix THE CUMULA TIVE LIAB ILITY OF ENTERASYS TO YOU FOR ALL CLAIMS RELA TING TO THE PROGRAM, IN CONTRACT , TORT OR OTHER WISE, SHALL NOT EX CEED THE TOT AL AM OUNT OF FEES PA I D TO ENTERASYS BY YOU FOR THE RIGHTS ? ...
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x ...
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xi Contents About This Guide Who Should Use This G uide ........ ................... .................... ................... ................... ................ .......... xv How to Use This G uide ............. ................... ................... .................... ................... ............... ........... .. xvi Related Documents .. ...
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Enterasys A2H124-24FX - page 14
xii Connecting AC and RPS-SYS Power ....... ................... .................... ................... ....................... ...... 3 -16 AC Power ....... .................... ................ ................... .................... ................... ................. ............ 3-16 C2RPS-SYS Redundant Power System ............... ....... ...
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Enterasys A2H124-24FX - page 15
xiii Figures 1-1 A2H124-24FX Stackable Switch ................ ................... ....................... ................... ............... 1-3 3-1 Mini-GBIC with RJ45 Connector ......... .................... ................... ................... ....................... .. 3-4 3-2 Mini-GBIC with MT-RJ Connec tor . ................... ......... ...
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xiv ...
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SecureStack A2 Installation Guid e xv About This Guide This guide pr ovides an over view , installa tion and troubleshooting instructio ns, and specifications for the Enterasys ® SecureStack A2H124 ‐ 24FX stackable Ethernet switch. For information about the C ...
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Enterasys A2H124-24FX - page 18
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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Enterasys A2H124-24FX - page 19
Conventions Used in This Guide SecureStack A2 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 equ ipm ...
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Conventions Used in This Guid e xviii About This Guide ...
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Enterasys A2H124-24FX - page 21
SecureStack A2 Installation Guide 1-1 1 Introduction This chapter introduces the A2H124 ‐ 24FX st ackable switch. Import ant Notice Depending on the firmware versi on used in the Se cureS tack A2, some features described in this document may not be supported. Refer to the Relea se Notes shipped with the A2H124-24FX to dete ...
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Enterasys A2H124-24FX - page 22
Overview 1-2 Introduction Overview The A2H124 ‐ 24FX is a stackable Fast Ethernet switc h, which can be adapted and scaled to help meet yo ur netw ork needs. This switch provides a management platform and uplinks to a network ? ...
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Enterasys A2H124-24FX - page 23
Overview SecureStack A2 Installation Guide 1-3 Figure 1- 1 A2H124-24FX S t ackable Switch S t ack Connections The switch has front ‐ panel RJ45 ports 25 and 26 for connections in a stack configuration. The stacking cables used for the connections are stand ...
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Enterasys A2H124-24FX - page 24
Connectivity 1-4 Introduction Connectivity The SecureStack A2 switch connects to Ethernet networks or w orkstations by wa y of the fixed front panel MT ‐ RJ ports and two uplink ports that support optional Mini ‐ GBICs. At the time ? ...
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Enterasys A2H124-24FX - page 25
Management SecureStack A2 Installation Guide 1-5 Management Management of the mod ule can be eithe r in ‐ band or out ‐ of ‐ band. In ‐ band remote management is possible using Te l n e t , Enterasys Networks’ NetSight ® management application, or the ...
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Enterasys A2H124-24FX - page 26
Getting Help 1-6 Introduction Getting Help For additional support related to the SecureStack A2 or this document, contact Enterasys Network s using one of the foll owing methods: Before contacti ng Enterasys Networks for technical support, have the ? ...
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Enterasys A2H124-24FX - page 27
SecureStack A2 Installation Guide 2-1 2 Network Requirements Before inst alling the device, review the requirements and spec ifications in this chapter concerning the following: 100BASE-FX Multimode Fiber-Optic Network The A2H124 ‐ 24FX provides 24 ports that support ...
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Enterasys A2H124-24FX - page 28
1000BASE-FX Fiber-Optic Network 2-2 Network Requirements 1000BASE-FX Fiber-Optic Network The Mini ‐ GBIC port sockets 27 and 28 on the A2H12 4 ‐ 24FX enable yo u to var y the type of 1 ‐ Gbps port connection. At the printing of this document th ...
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Enterasys A2H124-24FX - page 29
SecureStack A2 Installation Guide 3-1 3 Hardware Installation This chapter provides instructions to install the A2H124 ‐ 24FX. Follow the order of the sections listed below to correctly install the switch. Electrical Hazard: Only qualified pe rsonnel should perform in ...
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Enterasys A2H124-24FX - page 30
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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Enterasys A2H124-24FX - page 31
Installing Optional Mini-GBICs SecureStack A2 Installation Guide 3-3 Inst alling Optional Mini-GBICs This section describes how to install Mini ‐ GBICs in the SFP port slots 27 and 28 on the A2H124 ‐ 24FX. It is recommended that the optional Mini ‐ ...
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Enterasys A2H124-24FX - page 32
Installing Optional Mini-GBICs 3-4 Hardware Installation Inst allation To install a Mini ‐ GBIC that has an RJ45 connector, refer to Figu re 3 ‐ 1 ; for a Mi ni ‐ GBIC with a MT ‐ RJ connector , refer to Figure 3 ‐ 2 ; for a Mini ‐ GBIC w ...
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Enterasys A2H124-24FX - page 33
Installing Optional Mini-GBICs SecureStack A2 Installation Guide 3-5 Figure 3-2 Mini-GBIC with MT -RJ Connector 1 SFP Slot 3 Release tab 2 Mini-GBIC (MGBIC-MT01) 4 Link/Activity LED 27 28 A2H124-24FX 25 26 27 28 25/Up 26/Down Stack Á À Ã Â ...
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Enterasys A2H124-24FX - page 34
Installing Optional Mini-GBICs 3-6 Hardware Installation Figure 3-3 Mini-GBIC with LC Connector Removing the Mini-GBIC 1 SFP Slot 3 Release tab 2 Mini-GBIC (MGBIC-LC01,-LC03, -LC09, MGBIC-08) 4 Link/Activity LED 27 28 A2H124-24FX 25 26 27 28 25/Up 26/Down Stack  Á À à Caution: Do NOT remove a Mini-GBIC from a slot without releasing the locking ...
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Enterasys A2H124-24FX - page 35
Installing the Switch on a Flat Surface SecureStack A2 Installation Guide 3-7 To remove a Mini ‐ GBIC from a port slot, refer back to Figure 3 ‐ 1 , Figure 3 ‐ 2 , and Figure 3 ‐ 3 , and proceed as follows: 1. Attach yo ur antista tic wri st strap (refer ...
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Enterasys A2H124-24FX - page 36
Installing the Switch on a Flat Surface 3-8 Hardware Installation Figure 3-4 Chassis Bottom, Rubber Feet Placement 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 ‐ 5 . A t ...
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Enterasys A2H124-24FX - page 37
Installing the Switch on a Flat Surface SecureStack A2 Installation Guide 3-9 If you are installin g several switches in a stack, proceed to “ Connecting Stacking Cables ” on page 3 ‐ 11. If the switch is being installed as a standalone swit ch ...
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Enterasys A2H124-24FX - page 38
Rack Mounting the Switch 3-10 Hardware Installation Rack Mounting the Switch To install the switch in a 19 ‐ inch rack, yo u need: •T w o rackmount brackets and mounting screws (rackmount kit) shipped with the switch. •F o u r user ‐ supplied screws ...
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Enterasys A2H124-24FX - page 39
Connecting Stacking Cables SecureStack A2 Installation Guide 3-11 Figure 3-6 Att aching the Rackmount Brac kets 2. W ith 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 ‐ 7 . T ...
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Enterasys A2H124-24FX - page 40
Connecting Stacking Cables 3-12 Hardware Installation Figure 3 ‐ 8 shows an exam ple of a four ‐ high stac k connected in a closed loop configuration. All ST AC K DOWN and ST ACK UP connectors are used in th e installation. The stacking ? ...
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Enterasys A2H124-24FX - page 41
Configuring Switches in a Stack SecureStack A2 Installation Guide 3-13 Configuring Switches in a S t ack The information in the follow ing sections is important to understand A2 switch operation and installations in a stack installation. About SecureSt ack A2 Swi tch Operation ...
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Enterasys A2H124-24FX - page 42
Configuring Switches in a Stack 3-14 Hardware Installation 3. The management election process uses th e following precedence to assi gn a management switch: a. Previously assigned/elected manage ment switch b. Management assigned priority (v alues 1–15) c. Hardw are p ...
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Enterasys A2H124-24FX - page 43
Configuring Switches in a Stack SecureStack A2 Installation Guide 3-15 3. Once the desired master swi tch has been selected, the current configuration wil l be saved and the stack will automatically reset. Yo u must now move the console cable ...
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Enterasys A2H124-24FX - page 44
Connecting AC and RPS-SYS Power 3-16 Hardware Installation Connecting AC and RPS-SYS Power AC Power To connect a switch to the AC power source, refer to Figure 3 ‐ 9 and proceed as follows: 1. Plug the power cord into the swit ch AC power connector . 2. Pl ...
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Enterasys A2H124-24FX - page 45
Connecting AC and RPS-SYS Power SecureStack A2 Installation Guide 3-17 Figure 3-9 Switch Rear V iew 3. Observe the pow er CPU LED (not shown), located on the front panel. During the initialization, the CPU LED will start by illuminating solid amber, then ...
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Enterasys A2H124-24FX - page 46
Connecting AC and RPS-SYS Power 3-18 Hardware Installation C2RPS-SYS Redundant Power System If you are installin g an optional redundant power system (C2RPS ‐ SYS), refer to the installation instructions supplied with the Secure Stack RPS. The switch is co ...
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Enterasys A2H124-24FX - page 47
Connecting AC and RPS-SYS Power SecureStack A2 Installation Guide 3-19 S t ack Initialization Overview When you install and connect all the stacking cables to the switches in the stack before applying power to the switches, the following occurs: •T h e ...
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Enterasys A2H124-24FX - page 48
Connecting to Console Port for Local Management 3-20 Hardware Installation Connecting to Console Port for Local Management This se ction descri bes how to connect an RS232 DTE interface cable from a PC, a VT series terminal, or a modem to an A2H124 ‐ 24FX ...
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Enterasys A2H124-24FX - page 49
Connecting to Console Port for Local Management SecureStack A2 Installation Guide 3-21 Connecting to an IBM or Comp atible Device To connect an IBM PC or compatible device, running the VT terminal emulation, to an Enterasys switch Console port ( Figure 3 ‐ 12 ), proce ...
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Enterasys A2H124-24FX - page 50
Connecting to Console Port for Local Management 3-22 Hardware Installation Connecting to a VT Series T erminal To connect a VT Series terminal to an Enterasys switch Console port ( Figure 3 ‐ 13 ), use a UTP serial interface cable terminated with a DB9 fem ...
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Enterasys A2H124-24FX - page 51
Connecting to Console Port for Local Management SecureStack A2 Installation Guide 3-23 Connecting to a Modem To connect a modem to an Enterasys Networks switch modem port ( Figure 3 ‐ 14 ), use a UTP cable terminated with a DB9 female connector and a DB25 ...
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Enterasys A2H124-24FX - page 52
Connecting to the Network 3-24 Hardware Installation Connecting to the Network This section provides the procedure to connect fiber ‐ optic cables from the fi xed front panel MT ‐ RJ ports to the network or other devices. In addition this section ...
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Enterasys A2H124-24FX - page 53
Connecting to the Network SecureStack A2 Installation Guide 3-25 2. Insert the MT ‐ RJ cable connector into the MT ‐ RJ front panel port un til it clicks into place. Figure 3-15 Connecting a Fiber-Opt ic Cable Segment to MT -RJ Port 3. V e rify that a link exists by ...
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Enterasys A2H124-24FX - page 54
Connecting to the Network 3-26 Hardware Installation Connecting Fiber-O ptic Cables to MT -RJ Min i-GBIC Port s This section contains the procedures for connecting a 1000BA SE ‐ SX multimode fiber ‐ optic segment from the network or other device to an MT ‐ RJ ...
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Enterasys A2H124-24FX - page 55
Connecting to the Network SecureStack A2 Installation Guide 3-27 2. Insert the MT ‐ RJ cable connector into the MT ‐ RJ connector unt il it clicks into place. 3. Plug the other end of the cable into the appropriate port on the other devi ...
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Enterasys A2H124-24FX - page 56
Connecting to the Network 3-28 Hardware Installation Connecting Fiber-Optic Cabl es to LC M ini-GBIC Port s This section describes how to connect •a 1000BAS E ‐ SX multimode fiber ‐ optic segment from the network or other devices to an LC port connector of ...
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Enterasys A2H124-24FX - page 57
Connecting to the Network SecureStack A2 Installation Guide 3-29 1. Remove the protectiv e covers from the Mini ‐ GB IC LC fiber ‐ optic po rt and from the connectors on each end of the cable. 2. Insert the LC cable connector into the Mini ? ...
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Enterasys A2H124-24FX - page 58
Connecting to the Network 3-30 Hardware Installation Connecting UTP Cables to RJ45 Mini-GBIC Port s The RJ45 Mi ni ‐ GBIC (MGBIC ‐ 02) ports are10/100/1000 Mbps ports and have internal crossovers. When connecting a wo rk st at io n to these ports, use a straight ...
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Enterasys A2H124-24FX - page 59
Connecting to the Network SecureStack A2 Installation Guide 3-31 Figure 3-16 Four-Wire Cros sover Cable RJ45 Pinout s for 10/100BASE-TX Figure 3-17 Four-Wire S traight-Through Cable RJ45 Pinout s for 10/100BASE-TX 1 RJ45 switch port 3 RJ45-to-RJ45 crossover cable 2 Other device port 4 RX+/RX- and TX+/TX-conne ctions These connections must share a c ...
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Enterasys A2H124-24FX - page 60
Connecting to the Network 3-32 Hardware Installation Figure 3-18 Eight-W ire Crossover Cabl e RJ45 Pinout s for 10/100/100 0BASE-TX Figure 3-19 Eight-W ire Straight- 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-R J45 straight-through cable 2 O ...
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Enterasys A2H124-24FX - page 61
Completing the Installation SecureStack A2 Installation Guide 3-33 Completing the Inst allation After installing the switch and making the connections to the ne twork, access the switch management, as described below . Initial Logon to Switch Management To initia lly access ...
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Enterasys A2H124-24FX - page 62
Completing the Installation 3-34 Hardware Installation ...
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Enterasys A2H124-24FX - page 63
SecureStack A2 Installation 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 c ...
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Enterasys A2H124-24FX - page 64
Using LANVIEW 4-2 Troubleshooting Using LANVIEW The A2H124 ‐ 24FX supports the Enterasys Netw orks built ‐ in LANVIEW LED visual diagnostic and status monitoring system. The LANVIEW LEDs on the A2H124 ‐ 24FX are located as shown in Figure 4 ‐ ...
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Enterasys A2H124-24FX - page 65
Using LANVIEW SecureStack A2 Installation Guide 4-3 T able 4-1 LANVIEW LEDs LED Color State Recommended Acti on CPU Off Power disconnected. If the LED remains 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. R eplace the pow er cord wit ...
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Enterasys A2H124-24FX - page 66
Using LANVIEW 4-4 Troubleshooting DOWN Off No valid conn ection to switch stackup connector . 1. Make sure the switch connected to the stackup connector is powered on. 2. Replace cable wi th a known good one. 3. If the problem still exists, cont act Enterasys Networks for technical support. Green Solid . V alid co nnection to switch stackup connect ...
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Enterasys A2H124-24FX - page 67
Using LANVIEW SecureStack A2 Installation Guide 4-5 RPS Off The RPS LED remains off regardless if the RPS is atta ched or not. The L ED being in its off st ate is n ot an indication that the RPS is not functioning properly and won’t supply power in the event of an AC power supply failure. See Amber state below . None. Amber Solid .The switch inte ...
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Enterasys A2H124-24FX - page 68
Troubleshooting Checklist 4-6 Troubleshooting 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 able 4-2 T roubleshoo ...
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Enterasys A2H124-24FX - page 69
Troubleshooting Checklist SecureStack A2 Installation Guide 4-7 Cannot contact the SecureS tack A2 through in-band management. IP address not assigned. Refer to the SecureSt ack A2 Configuration Gu ide for the IP address assignment procedure. Port is disab led. This is normal if the swi tch is a Member in a stack. If operating as a standalon e swit ...
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Enterasys A2H124-24FX - page 70
Troubleshooting Checklist 4-8 Troubleshooting Port(s) goes into standby for no apparent reason. Loop condition detected. V erify that S panning T ree is enabled. Refer to th e SecureS tack A2 Configuration Gu ide for the instructions to set the type of ST A. Review the network design and delete unnecessary lo op s. If the problem continues, contact ...
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Enterasys A2H124-24FX - page 71
Using the Reset Password Switch SecureStack A2 Installation Guide 4-9 Using the Reset Password Switch If you forget the Secure Stack A2 login passw ord, use the Reset Pa s s w o r d switch as described in the following procedure. Figure 4-2 Reset Password Switch To rese ...
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Enterasys A2H124-24FX - page 72
Using the Reset Password Switch 4-10 Troubleshooting ...
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Enterasys A2H124-24FX - page 73
SecureStack A2 Installation Guide A-1 A Specifications This appendix provides information about the f ollowing: Enterasys Network s re serves the right to change the specifications at any time without notice. For information about... Refer to page... Switch S pecificat ions A-2 ...
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Enterasys A2H124-24FX - page 74
Switch Specifications A-2 Specifications Switch S pecifications Ta b l e A ‐ 1 provides the I/O ports, processors and memo ry , physical, and environmental specifications for the A2H124 ‐ 24FX. T able A-1 A2H124-24FX Switch S pecifications Item S pecification MT -RJ ports 1 through 24 T we ...
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Enterasys A2H124-24FX - page 75
Mini-GBIC Input/Output Specifications SecureStack A2 Installation Guide A-3 Mini-GBIC Input/Output S pecifications The Mini ‐ Gigabit Ethernet Card (Mini ‐ GBIC) port interface slots can support 1 ‐ Gbps fiber ‐ optic connections as de scribed in Ta b l e A ‐ 2 . The ...
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Enterasys A2H124-24FX - page 76
Gigabit Ethernet Specifications A-4 Specifications Gigabit Ethernet S pecifications The following specificat ions for the Mi ni ‐ GBICs shown in Ta b l e A ‐ 3 through Ta b l e A ‐ 11 meet or exceed the IEEE 802.3z ‐ 1998 standard. MGBIC-LC01/MGBIC-MT01 S pec ifications (10 ...
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Enterasys A2H124-24FX - page 77
Gigabit Ethernet Specifications SecureStack A2 Installation Guide A-5 MGBIC-LC03 S pecific ations (1000BASE-SX) MGBIC-LC09 S pecific ations (1000BASE-LX) T able A-5 MGBIC-LC03 Optical Spec ifications 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 Sensiti vity -20 dBm ...
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Enterasys A2H124-24FX - page 78
Gigabit Ethernet Specifications A-6 Specifications MGBIC-08 Sp ecificati ons (1000BASE-ELX) MGBIC-02 Sp ecifications (1000BASE-T) T able A-9 MGBIC-08 Optical Specific ations Item 10 µm SMF 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 Bud ...
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Enterasys A2H124-24FX - page 79
Console Port Pinout Assignments SecureStack A2 Installation Guide A-7 Console Port Pinout Assignment s The Console port is a DB9 serial communications port for local access to Loca l Management. Refer to Figure A ‐ 1 for the Console port pin assignments. F ...
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Enterasys A2H124-24FX - page 80
Regulatory Compliance A-8 Specifications ...
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Enterasys A2H124-24FX - page 81
Index-1 Index Numerics 1000BASE-FX fiber-opitc Network 2-2 1000BASE-T twisted pair Gi gabit Ethernet Network 2-2 100BASE-FX multimode fiber-op tic Network 2-1 A A2H124-24FX overview of 1-2 C Cable fiber budget A-3 CLI command introduction to 1-5 Configuring switches stack configuration 3-13 Connecting Fiber-Optic Cable s from A2H124-24FX to the Net ...
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Enterasys A2H124-24FX - page 82
Index-2 Redundant Power Supply Capability introduction to 1-3 Regulatory Compliance A-7 Related manua ls xvi Reset switch 4-9 S Safety requirements A-7 Specifications A-1 A2H124-24FX A-2 MGBIC-02 A-6 MGBIC-08 A-6 MGBIC-LC01 A-4 , A-5 MGBIC-LC03 A-5 MGBIC-LC09 A-5 MGBIC-MT01 A-4 , A-5 Mini-GBIC input/outputs A-3 Stack initi alization manager switch ...
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