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10  Product Overview

VH-2402S

Auto-negotiation

Auto-negotiation is a process that permits the switch to automatically 

select the operational modes of its 10/100 RJ-45 ports. Upon first being 
connected, the switch detects the speed of the network the port is 

connected to, either 10Mbps or 100Mbps, and the type of communication 

setting, half or full duplex. The port is then automatically set by the switch 
to operate in the proper mode, without user intervention. It is not required 

that the network device being connected to the switch supports auto-

negotiation as the VH-2402S switch automatically adjusts to the network 
device’s communication settings. Auto-negotiation is configurable using 

the console interface menus, the on-board Web agent, or via SNMP.

BootP

The Bootstrap Protocol (BootP) provides for the capability of passing 
configuration information to hosts on a TCP/IP network. Using this 

process, network devices do not need to be configured before they can 

communicate using the TCP/IP protocol suite. The VH-2402S switch uses 
BootP to automatically configure IP address information without requiring 

access to the console menus. BootP operation is configurable using the 

console interface menus, the on-board Web agent, or via SNMP.

LEDs

The switch port LEDs provide a quick and accurate display of the integrity 

of switch connections and port mode. Each RJ-45 port has a Link and 

Mode LED. The color of the Link LED indicates a 10 Mbps or 100 Mbps 
connection. The operation of the Mode LEDs can be changed by use of 

the LED Mode button on the switch front panel. When the LED Mode 

button is pressed, the operation of the RJ-45 Mode LEDs changes to 
indicate Activity (Act) and full/half duplex operation (FDX), and flow 

control (Flow Ctrl) respectively. The module LEDs indicate Status and 

Activity for each of the modules. The module LEDs are not affected by the 
LED Mode button.

Full Duplex Mode

The full-duplex mode of operation on a port can double the throughput of 

switch connections. This mode disables the collision detection portion of 
the Ethernet Carrier Sense Multiple Access with Collision Detection 

(CSMA/CD) protocol, allowing for two-way traffic. Full duplex is 

configurable using the console interface menus, the on-board Web agent, 
or via SNMP.

Summary of Contents for Vertical Horizon VH-2402S

Page 1: ...9033644 Vertical Horizon VH 2402S FAST ETHERNET SWITCH USER GUIDE...

Page 2: ......

Page 3: ...TION CONTAINED IN IT EVEN IF ENTERASYS NETWORKS HAS BEEN ADVISED OF KNOWN OR SHOULD HAVE KNOWN THE POSSIBILITY OF SUCH DAMAGES 2000 by Enterasys Networks Inc P O Box 5005 Rochester NH 03866 5005 All R...

Page 4: ...operate the equipment INDUSTRY CANADA NOTICE This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of...

Page 5: ...maximum radiance from the optical port under worst case conditions is 0 8 W cm 2 or 8 x 103 W m2 sr 1 Do not use optical instruments to view the laser output The use of optical instruments to view las...

Page 6: ...ngeren Zeitraum nicht benutzt sollten Sie es vom Stromnetz trennen Somit wird im Falle einer berspannung eine Besch digung vermieden 12 Durch die L ftungs ffnungen d rfen niemals Gegenst nde oder Fl...

Page 7: ...of Commerce which prohibit export or diversion of certain technical products to certain countries unless a license to export the product is obtained from the U S Government or an exception from obtai...

Page 8: ...its documentation and media ENTERASYS DISCLAIMS ALL WARRANTIES OTHER THAN THOSE SUPPLIED TO YOU BY ENTERASYS IN WRITING EITHER EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF ME...

Page 9: ...0082 1 EN 60950 Equipment Type Environment Networking Equipment for use in a Commercial or Light Industrial Environment We the undersigned hereby declare under our sole responsibility that the equipme...

Page 10: ...Notice viii 9033644...

Page 11: ...Storage 8 Configuration and Management Interfaces 8 RMON 9 Port Mirroring 9 Auto negotiation 10 BootP 10 LEDs 10 Full Duplex Mode 10 Flow Control 11 Virtual LANs VLANs 11 Class of Service 11 Port Trun...

Page 12: ...Base FX 1000Base SX LX Fiber Ports 28 APPENDIX A TECHNICAL SPECIFICATIONS 29 General 29 Standards Compliance 29 Regulatory Compliance 29 Data Rate 29 Environmental Specifications 29 Electrical Specifi...

Page 13: ...on Control Protocol Internet Protocol TCP IP and Simple Network Management Protocol SNMP Conventions This section describes the conventions used in this guide Message Formats Two types of messages ide...

Page 14: ...on Describes the content of your switch shipment lists site requirements and provides mounting instructions Instructions for making connections and powering up the switch are provided as well Appendix...

Page 15: ...a integrity In this mode the entire packet must be received into a port buffer and checked for validity before being forwarded This prevents errors from being propagated throughout the network This sw...

Page 16: ...cludes two fans that maintain ventilation and cooling for internal switch components Features Ports 24 dual speed 10Base T 100Base TX ports using RJ 45 connectors MDI X 3 slots for optional modules 1...

Page 17: ...88 000 pps 1000 Mbps Network Management SNMP compliant agent MIB II RFC 1213 Bridge MIB RFC 1493 Ethernet like MIB RFC 1643 RMON Statistics History Alarm and Event groups RFC 1757 Interface Evolution...

Page 18: ...gement Module is installed and in operational mode Link LEDs Yellow indicates a 10 Mbps link green indicates a 100 Mbps link off indicates no link and flashing indicates that the port has been manuall...

Page 19: ...100Base FX MMF Ports Two multi mode fiber ports using SC connectors for uplink See 100Base FX 1000Base SX LX Fiber Ports on page 28 for a detailed description 100Base FX SMF Ports One single mode fibe...

Page 20: ...le 9380142 and the 1 m cable 9380143 can be ordered separately if required Management Console port Male DB 9 connector configured as a null modem connection for serial out of band management using the...

Page 21: ...through the switch with the Spanning Tree Protocol choosing a single path at any given time and disabling all others If the chosen path fails for any reason a disabled alternative is activated thereb...

Page 22: ...ack can be managed using any of the following methods Serial console out of band An RS 232 connection using a DB 9 connector is included on the Management Module for system management Serial console m...

Page 23: ...mber of packets broadcasts collisions errors and distribution of packet sizes History a function that collects historical statistics based on user defined sampling intervals The statistical informatio...

Page 24: ...tch uses BootP to automatically configure IP address information without requiring access to the console menus BootP operation is configurable using the console interface menus the on board Web agent...

Page 25: ...Class of Service attributes per the IEEE 802 1p standard using a priority queuing mechanism This feature ensures that traffic during congestion periods will not interfere with traffic assigned a highe...

Page 26: ...d Port Configuration Flow Control Disabled Speed and Duplex Auto Admin Enabled Port Priority Default Ingress User Priority 0 Spanning Tree Algorithm Active Aging Time 300 Bridge Priority 32768 Forward...

Page 27: ...oduct Overview 13 Virtual LANs Acceptable VLAN Frame Type All Configurable PVID Tagging Yes GVRP Disabled Untagged VLAN Group Assignment 1 VLAN Ingress Filtering False VLAN Learning SVL Parameter Defa...

Page 28: ...work segmentation and traffic prioritization The VH 2402S switch is ideal for meeting the needs of today s high performance networks The switch s low cost and high port count makes it attractive and a...

Page 29: ...nnections to servers by connecting each to a dedicated switch port Figure 1 4 Users can be accommodated through connections to hubs both at 10Mbps and 100Mbps speeds through 10Mbps switches with 100Mb...

Page 30: ...cess Figure 1 5 Workgroup hubs are provided with a single connection to the switch while servers are put on dedicated 100 Mbps ports Routers and other networking devices can connect off of the switche...

Page 31: ...shelf surface or an optional 19 in 48 3 cm equipment rack Use an EIA standard equipment rack that is grounded and physically secure Power source Provide a power source within six feet 1 8 m of the in...

Page 32: ...anel RJ 45 ports visibility of the port LEDs and access to the rear panel modules and power cord Make sure that the mounting surface can safely support the switch stack and that there is adequate spac...

Page 33: ...tch using two 2 of the supplied screws Repeat this step for the other side of the switch 2 Slide the switch into the rack and align the holes in the rack mounting ears with the holes in the rack rails...

Page 34: ...Repeat this step for each switch in the stack or rack Form a simple chain starting at the DOWN port on the first switch and ending at the UP port on the last switch Figure 2 2 Connecting Switches to t...

Page 35: ...her of the two lower slots on the rear panel of the switch A Management Module can be installed in the upper slot on the rear of the switch 3 Before opening the package that contains the module touch...

Page 36: ...tch goes through its initialization process See Powering the Switch on page 25 The console port is a standard RS 232 connection using a male DB 9 connector see Table A 1 for pinouts A null modem wired...

Page 37: ...i e COM 1 4 then set communications to 8 data bits 1 stop bit no parity 19200 bps and no flow control In Band Connections Prior to accessing the Management Module via a network connection you must co...

Page 38: ...ation for the Management Module available for the VH 2402S Table 2 2 Management Module Part Number Functions Description VH SMGMT RMON SNMP Web Manage ment SNMP agent module used to manage the switch...

Page 39: ...re displayed on the screen If you want to display the results of the tests after the switch has been turned on turn the power to the switch off then back on The switch performs two basic types of test...

Page 40: ...length constraints for the Gigabit Ethernet short wavelength fiber interface on the fiber optic media module Table 2 5 1000Base SX Fiber Specifications Interface Type Cable Requirement Maximum Length...

Page 41: ...to 10Base T or 100Base TX network segments or end stations These UTP connections meet the requirements of ISO 8877 specified by 10Base T Section 14 of the IEEE 802 3 specification Workstations or serv...

Page 42: ...0Base FX and 1000Base SX LX ports use SC fiber connectors The fiber connectors are configured as a receive RX transmit TX pair Table 2 7 Fiber Uplink Modules Part Number Functions Description VHIM100...

Page 43: ...use 25 IEEE 802 3u 100Base FX IEEE 802 3z 1000Base SX 1000Base LX IEEE 802 3x Flow Control EIA RS 232C DTE to DCE EIA RS 310C 19 rackmount Regulatory Compliance Safety UL 1950 CSA C22 2 No 950 73 23 E...

Page 44: ...l Specifications Input voltage 100 240 VAC Input frequency 50 60 Hz Maximum power consumption 80 VA Physical Specifications Height 2 5 in 6 4 cm Length 11 2 in 28 5 cm Width 17 3 in 44 cm mountable in...

Page 45: ...RS 232 Console Port Pin Assignments 10Base T and 100Base TX Ports Table A 2 shows the 10Base T 100Base TX pinouts These ports are wired MDI X All undefined pins are not used Table A 2 10Base T 100Bas...

Page 46: ...itch Power cord sets for use in other countries must meet the requirements of the country where you use the switch For more information on power cord set requirements contact your Enterasys Networks S...

Page 47: ...er and wall plug must bear the certification mark of the agency responsible for evaluation in the country where it will be used Country Accredited Agency See Notes Australia EANSW 1 Austria OVE 1 Belg...

Page 48: ...15P 15A 125V or NEMA 6 15P 15A 250V configuration Note 3 Appliance coupler flexible cord and wall plug must bear a T mark and registration number in accordance with the Japanese Dentori Law Flexible...

Page 49: ...trol function on the port from which the packet entered the switch in this case port X Since port X is configured with flow control set to Enabled the switch responds by initiating a pause frame full...

Page 50: ...36 Flow Control VH 2402S...

Page 51: ...gory 5 CRC Cyclic Redundancy Check CSMA CD Carrier Sense Multiple Access Collision Detection DCE Data Communications Equipment modem DSR Data Send Ready DTE Data Terminal Equipment DTR Data Terminal R...

Page 52: ...ons VH 2402S SNMP Simple Network Management Protocol TCP IP Transmission Control Protocol Internet Protocol TFTP Trivial File Transfer Protocol TXD Transmit Data UTP Unshielded Twisted Pair VLAN Virtu...

Page 53: ...ckplane 20 console port 8 22 31 contents of package 17 cooling requirements 18 copper cables 26 ports 4 crossover cable 27 32 D data rates 29 DB 9 connector 8 default settings 12 description of switch...

Page 54: ...unting ears 19 mounting the switch in a rack 19 on a table or shelf 18 multi mode fiber 26 28 N network applications 14 network management features 3 network traffic analysis 9 non volatile Flash memo...

Page 55: ...ree Protocol 7 stacking connecting switches 20 module features 2 6 stack cables 20 standards compliance IEEE 29 Status LEDs module 4 store and forward switching 7 switch description 1 switch ID 4 T TC...

Page 56: ...4 Index VH 2402S...

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Page 58: ...150xxx 102 R01...

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