Allied-telesis AT-S39 User Manual

Management SoftwareAT-S39◆User’s GuideFOR THE AT-8024, AT-8024GB, AND AT-8026FC FAST ETHERNET SWITCHESVERSION 1.4®PN 613-50245-00 Rev D

10PrefaceThis guide contains instructions on how configure an AT-8024, AT-8024GB or AT-8026FC Fast Ethernet Switch using the AT-S39 management softwar

Section II: Local and Telnet Management100Tagged VLAN OverviewThe second type of VLAN supported by the AT-8024 and AT-8024GB Switches is a tagged VLAN

AT-S39 User’s Guide101The parts of a tagged VLAN are much the same as those for a port-based VLAN. They are:❑ VLAN Name❑ VLAN Identifier❑ Tagged and U

Section II: Local and Telnet Management102General Rulesto Creating aTagged VLANBelow is a summary of the rules to observe when creating a tagged VLAN.

AT-S39 User’s Guide103Tagged VLANExampleFigure 26 illustrates how tagged ports can be used to interconnect IEEE 802.1Q-based products. Figure 26 Exam

Section II: Local and Telnet Management104The port assignments for the VLANs are as follows:This example is nearly identical to the Port-based Example

AT-S39 User’s Guide105Basic VLAN Mode OverviewThe Fast Ethernet Switches support a special VLAN configuration referred to as Basic VLAN Mode. When the

Section II: Local and Telnet Management106Creating a Port-based or Tagged VLANTo create a new port-based or tagged VLAN, perform the following procedu

AT-S39 User’s Guide107The Create a VLAN window in Figure 29 is displayed.Figure 29 Create a VLAN Window4. Type 1 to select VLAN Name and enter a name

Section II: Local and Telnet Management1086. If the VLAN will contain tagged ports, type 3 to select Tagged Ports and specify the ports. If this VLAN

AT-S39 User’s Guide10914. Check to see that the VLAN was created correctly and that it contains the appropriate ports.15. Press Esc or type R to retur

AT-S39 User’s Guide11Document ConventionsThis document uses the following conventions:NoteNotes provide additional information.WarningWarnings inform

Section II: Local and Telnet Management110Example of Creating a Port-based VLANThe following procedure creates the Sales VLAN illustrated in Port-base

AT-S39 User’s Guide111Example of Creating a Tagged VLANThe following procedure creates the Engineering VLAN in the top switch illustrated in Tagged VL

Section II: Local and Telnet Management112Modifying a VLANNoteYou need to know the VID of the VLAN you want to modify to perform this procedure. To vi

AT-S39 User’s Guide113When changing a VLAN’s name, observe the following guidelines:❑ A VLANs new name cannot be the same as another VLAN on the same

Section II: Local and Telnet Management114When adding or removing untagged ports, observe the following guidelines:❑ To add or remove untagged ports,

AT-S39 User’s Guide1159. Type R to select Return to Previous Menu.The Virtual LAN Definitions menu in Figure 28 is displayed.10. Type S to select Save

Section II: Local and Telnet Management116Displaying VLAN InformationTo view the names, VID numbers, and member ports of all the VLANs on a switch, pe

AT-S39 User’s Guide117Deleting a VLANNoteYou need to know the VID of the VLAN you want to delete to perform this procedure. To obtain a VLAN’s VID, re

Section II: Local and Telnet Management1186. Type D to delete the VLAN or R to cancel the procedure.The following confirmation prompt is displayed:Are

AT-S39 User’s Guide119Deleting All VLANsThis section contains the procedure for deleting all VLANs, except the Default VLAN, on a switch. To delete se

Preface12Where to Find Web-based GuidesThe installation and user guides for all Allied Telesyn products are available in Portable Document Format (PDF

Section II: Local and Telnet Management120Changing a PVID ValueThe procedure in this section explains how to change a PVID value for a port. As explai

AT-S39 User’s Guide121The Port VLANS & Priorities window in Figure 34 is displayed.Figure 34 Port VLANs and Priorities Window5. Type 2 to select

Section II: Local and Telnet Management122Setting a Switch’s VLAN ModeThis section contains the procedure for setting a switch’s VLAN mode. You can co

AT-S39 User’s Guide123Enabling or Disabling All VLANsThis procedure performs exactly the same function as the previous procedure. It sets a switch’s V

Section II: Local and Telnet Management124The prompt enclosed in asterisks gives the current status of the VLANs.4. Type E to enable the VLANs or D to

AT-S39 User’s Guide125Enabling or Disabling Ingress FilteringThere are certain rules a switch follows as it receives and forwards an Ethernet frame. T

Section II: Local and Telnet Management126There is one other thing that should be mentioned about ingress filtering and tagged packets, and that is th

127Chapter 11MAC Address TableThe chapter contains the procedures for viewing the static and dynamic MAC address table. The sections in this chapter i

Section II: Local and Telnet Management128MAC Address OverviewEvery hardware device that you connect to your network has a unique MAC address associat

AT-S39 User’s Guide129The type of MAC address described above is referred to as a dynamic MAC address. Dynamic MAC addresses are addresses that the sw

AT-S39 User’s Guide13Contacting Allied TelesynTo contact Technical Support by phone, find your country or region in the table below.You can also conta

Section II: Local and Telnet Management130Displaying MAC AddressesThe management software has two menu selections for displaying the MAC addresses of

AT-S39 User’s Guide131The management software displays the MAC addresses. Figure 39 is an example of the Show All MAC Addresses window, which displays

Section II: Local and Telnet Management132The port numbering scheme is from right to left. As an example, assume that ports 1 through 4 on the switch

AT-S39 User’s Guide133Viewing MAC Addresses by PortThis section contains the procedure for viewing the dynamic MAC addresses that have been learned on

Section II: Local and Telnet Management134Identifying a Port Number by MAC AddressIn some situations, you might want to know which port a particular M

AT-S39 User’s Guide135Viewing the MAC Addresses of a VLANThe procedure in this section can be useful if you created VLANs on the switch and want to vi

Section II: Local and Telnet Management136Deleting All Dynamic MAC AddressesThe management software allows you to purge the MAC address table of all d

AT-S39 User’s Guide137Adding Static MAC AddressesThe management software allows you to assign up to 255 static MAC addresses per port on an AT-8024 or

Section II: Local and Telnet Management138Deleting MAC AddressesThe following procedure explains how to delete a static or dynamic MAC address from th

AT-S39 User’s Guide139Changing the Aging TimeThe switch uses the aging time to delete inactive dynamic MAC addresses from the MAC address table. When

Preface14Management Software UpdatesNew releases of our management software programs for our managed products can be downloaded from our web site at w

140Chapter 12Class of ServiceThis chapter contains the procedures for configuring the Class of Service (CoS) feature of the AT-S39 software. Sections

AT-S39 User’s Guide141Class of Service OverviewThe AT-8024, AT-8024GB, and AT-8026FC switches support CoS as specified in the IEEE 802.1p and 802.1Q s

Section II: Local and Telnet Management142Configuring CoSTo configure CoS for a port, perform the following procedure:1. From the Main Menu, type 2 to

143Chapter 13IGMP SnoopingThis chapter explains how to activate and configure the Internet Group Management Protocol (IGMP) snooping feature on the sw

Section II: Local and Telnet Management144IGMP Snooping OverviewIGMP snooping is best explained by first defining IGMP. This protocol enables routers

AT-S39 User’s Guide145Without IGMP snooping, a switch would have to flood multicast packets out all of its ports, except the port on which it received

Section II: Local and Telnet Management146Activating IGMP SnoopingTo activate or deactivate IGMP snooping on the switch and to configure IGMP snooping

AT-S39 User’s Guide147multicast group by sending a leave request or when the host node stops sending reports. The switch responds by immediately ceasi

Section II: Local and Telnet Management1485 - Multicast Router Port(s)Specifies the port on the switch to which the multicast router is detected. You

AT-S39 User’s Guide149Displaying a List of Host NodesYou can use the AT-S39 software to display a list of the multicast groups on a switch, as well as

15Section IOverviewThe chapter in this section provides a brief overview of the AT-S39 management software. It explains some of the functions that you

Section II: Local and Telnet Management150Displaying a List of Multicast RoutersA multicast router is a router that is receiving multicast packets fro

151Chapter 14Broadcast Frame ControlThis chapter contains the procedures for configuring the broadcast frame control feature of the AT-S39 management

Section II: Local and Telnet Management152Broadcast Frame Control OverviewMost frames on an Ethernet network are unicast frames. A unicast frame is se

AT-S39 User’s Guide153Here’s an example. Let’s assume that you sent the timer interval for 100 Mbps ports to 100 milliseconds and the maximum broadcas

Section II: Local and Telnet Management154Configuring the Interval TimerTo set the interval timer for the broadcast frame control feature, perform the

AT-S39 User’s Guide155For example, if you enter “20” for the interval timer for 10 Mbps ports, the management software multiples the value by 10. The

Section II: Local and Telnet Management156Configuring the Maximum Broadcast Frame CountTo specify the maximum number of broadcast frames a port on the

157Chapter 15Ethernet StatisticsThis chapter contains the procedures for displaying data traffic statistics. Sections in the chapter include:❑ Display

Section II: Local and Telnet Management158Displaying Port StatisticsTo display Ethernet port statistics, perform the following procedure:1. From the M

AT-S39 User’s Guide159The statistics for the port are displayed in the Display Port Statistics window, shown in Figure 46.Figure 46 Display Port Stat

16Chapter 1OverviewThe AT-S39 management software is intended for the AT-8024, AT-8024GB, and AT-8026FC Fast Ethernet Switches. The software is used t

Section II: Local and Telnet Management160Undersize PacketsNumber of packets that were less than the minimum length specified by IEEE 802.3 (64 bytes

AT-S39 User’s Guide161Displaying Switch StatisticsTo display Ethernet statistics for an entire switch, perform the following procedure:1. From the Mai

Section II: Local and Telnet Management162Received BroadcastNumber of broadcast packets received on the switch.Received MulticastNumber of multicast p

163Chapter 16Management Software UpdatesThis chapter explains how to obtain new versions of the AT-S39 management software and how to download the sof

Section II: Local and Telnet Management164Obtaining Software UpdatesNew releases of the AT-S39 management software are available from the Allied Teles

AT-S39 User’s Guide165Downloading New Management Software from a Local Management SessionThis section contains the procedure for downloading a new ver

Section II: Local and Telnet Management166The following menu is displayed:Figure 48 Xmodem Downloads & Uploads MenuNoteThis version of the manage

AT-S39 User’s Guide167The following prompt is displayed:You are going to invoke the Xmodem download utility.Do you wish to continue? [Yes/No]6. Type Y

Section II: Local and Telnet Management16810. Click on the Protocol field and select as the transfer protocol either Xmodem or, for a faster download,

AT-S39 User’s Guide169Downloading a Management Software Image Using TFTPThe AT-S39 software comes with TFTP server software. If your network is using

AT-S39 User’s Guide17To actively manage a switch, such as to change or adjust its operating parameters, you must access the switch’s AT-S39 management

Section II: Local and Telnet Management170Uploading a Configuration FileThe switch configuration information can be uploaded and saved to a file on a

171Section IIIWeb Browser ManagementThe chapters in this section explain how to manage an AT-8024 or AT-8024GB Fast Ethernet switch using a web browse

172Chapter 17Starting a Web Browser Management SessionThis chapter contains the procedure for starting a management session on an AT-8024, AT-8024GB,

AT-S39 User’s Guide173Starting a Web Browser Management SessionThis section explains how to start a web browser management session. NoteIn order for y

174The window shown in Figure 53 is displayed.Figure 53 Home PageThis is the Home page of the management software. In the left portion of the Home pa

AT-S39 User’s Guide175Quitting from aWeb BrowserManagementSessionTo exit from a web browser management session, return to the Home page and select Exi

176Chapter 18Basic Switch ParametersThis chapter contains the following sections:❑ Configuring an IP Address and Switch Name on page 177❑ Activating t

AT-S39 User’s Guide177Configuring an IP Address and Switch NameNoteFor guidelines on when to assign an IP address, subnet address, and gateway address

Section III: Web Browser Management178The General tab in Figure 54 is displayed.Figure 54 General Tab Window - ConfigurationNoteThis procedure descri

AT-S39 User’s Guide1793. Change the parameters as desired. The parameters are described below:System NameThis parameter specifies a name for the switc

Section I: Overview18Local Management SessionYou establish a local management session with an AT-8024, AT-8024GB, or ATY-8026FC Fast Ethernet Switch b

Section III: Web Browser Management180Gateway addressThis parameter specifies the default router’s IP address. This address is required if you intend

AT-S39 User’s Guide181Activating the BOOTP and DHCP ServicesFor background information on BOOTP and DHCP, refer to the section Activating the BOOTP an

Section III: Web Browser Management182Viewing System InformationTo view basic information about the switch, perform the following procedure:1. From th

AT-S39 User’s Guide183This window is for viewing purposes only. You cannot change any of the values from this window. The sections in the window are d

Section III: Web Browser Management184Configuring the SNMP Parameters and Trap IP AddressesTo change the switch’s SNMP community strings or to specify

AT-S39 User’s Guide185Trap Receiver 1Trap Receiver 2Trap Receiver 3Trap Receiver 4Use these selections to specify the IP addresses of up to four manag

Section III: Web Browser Management186Resetting a SwitchTo reset a switch, perform the following procedure:1. From the Home Page, select Configuration

187Chapter 19Port ParametersThe procedures in this chapter allow you to view and change the parameter settings for the individual ports on a switch. E

Section III: Web Browser Management188Configuring Port ParametersTo configure the parameter settings for a port on a switch, perform the following pro

AT-S39 User’s Guide189The Settings for Port window is displayed. An example of the window is shown in Figure 58.Figure 58 Settings for Port WindowNot

AT-S39 User’s Guide19Telnet Management SessionAny management workstation on your network that has the Telnet application protocol can be used to manag

Section III: Web Browser Management190❑ 100Mbps - Half Duplex❑ 100Mbps - Full DuplexBroadcast Storm ControlThe maximum number of broadcast packets the

AT-S39 User’s Guide191Displaying Port Status and StatisticsThe procedure in this section displays the operating status of the ports on a switch and po

Section III: Web Browser Management192If you select port status, the Port Status window in Figure 60 is displayed.Figure 60 Port Status WindowThe inf

AT-S39 User’s Guide193MDIThe operating configuration of the port. Possible values are MDI and MDI-X.SpeedThe operating speed of the port. Possible val

Section III: Web Browser Management194Priority LevelThe priority queue to which untagged packets are directed when received on the port. A value of 1

AT-S39 User’s Guide195Received MulticastNumber of multicast packets received on the port.CRC ErrorNumber of packets with a cyclic redundancy check (CR

196Chapter 20Port SecurityThis chapter explains how to display the current port security level on the switch from a web browser management session. No

AT-S39 User’s Guide197Displaying the Port Security LevelTo display the switch’s port security level, perform the following procedure:1. From the Home

198Chapter 21Port TrunksThis chapter contains the procedure for creating or deleting a port trunk using a web browser management session.NoteFor backg

AT-S39 User’s Guide199Creating or Deleting a Port TrunkCautionDo not connect the cables of a port trunk to the ports on the switch until after you hav

Copyright  2002 Allied Telesyn, Inc. 960 Stewart Drive Suite B, Sunnyvale, CA 94085 USAAll rights reserved. No part of this publication may be reprod

Section I: Overview20Web Browser Management SessionYou can also use a web browser to manage a switch. This too is a type of remote management, just li

Section III: Web Browser Management2004. To create a port trunk, do the following:a. Click the ports that will make up the port trunk. A selected port

201Chapter 22Port MirroringThis chapter contains the procedure for creating or deleting a port mirror.NoteFor background information on port mirroring

Section III: Web Browser Management202Creating or Deleting a Port MirrorTo create or delete a port mirror, perform the following procedure: 1. From th

AT-S39 User’s Guide2035. To disable port mirroring, select “None“ from the Mirroring Port pull-down menu and click Apply.The port mirror is deleted. T

204Chapter 23Spanning Tree ProtocolThis chapter explains how to configure the STP bridge parameters on an AT-8024, AT-8024GB, or AT-8026FC Fast Ethern

AT-S39 User’s Guide205Configuring a Bridge or Port’s STP SettingsCautionSTP on a bridge is disabled by default. If you enable STP, the bridge provides

Section III: Web Browser Management2064. To enable or disable STP on the switch, click the Enable STP check box. A check in the box indicates that STP

AT-S39 User’s Guide207NoteThe aging time for BPDUs is different from the aging time used by the MAC address table.6. After you have made the desired c

Section III: Web Browser Management208Bridge Hello TimeThe time interval between generating and sending configuration messages by the bridge. The defa

AT-S39 User’s Guide209Displaying a Bridge or Port’s STP SettingsTo display the STP settings, perform the following procedure:1. From the Home page, se

AT-S39 User’s Guide21SNMP Management SessionAnother way to remotely manage the switch is with an SNMP management program. A familiarity with Managemen

210Chapter 24Virtual LANsThis chapter explains how to create, modify, and delete VLANs from a web browser management session. This chapter also explai

AT-S39 User’s Guide211Creating a VLANTo create a new VLAN, perform the following procedure:1. From the Home page, select Configuration. 2. From the Co

Section III: Web Browser Management2124. Click Add.The Add VLAN window in Figure 69 is displayed.Figure 69 Add VLAN Window5. Select the Name field an

AT-S39 User’s Guide213example, if you are creating a VLAN called Sales that will span three switches, you must assign the same VID value to each Sales

Section III: Web Browser Management214NoteThe untagged ports that you assign to the new VLAN are automatically removed from their current VLAN assignm

AT-S39 User’s Guide215Modifying a VLANTo modify a VLAN, perform the following procedure:1. From the Home page, select Configuration.2. From the Config

Section III: Web Browser Management216Deleting a VLANTo delete a VLAN from the switch, perform the following procedure:1. From the Home page, select C

AT-S39 User’s Guide217Displaying VLANsTo display all the existing VLANs on a switch, perform the following procedure:1. From the Home page, select Mon

Section III: Web Browser Management218Setting the Switch’s VLAN ModeThis section contains the procedure for setting a switch’s VLAN mode. You can conf

AT-S39 User’s Guide219Enabling or Disabling VLANsThis procedure performs exactly the same function as the previous procedure. It sets a switch’s VLAN

22Section IILocal and Telnet ManagementThe chapters in this section explain how to manage an AT-8024, AT-8024GB, or AT-8026FC Fast Ethernet Switch fro

Section III: Web Browser Management220Changing a PVIDThe procedure in this section explains how to change a PVID value for a port. As explained in Por

AT-S39 User’s Guide2216. Use the pull-down menu from the Port VLAN ID selection to specify the new PVID value for the port. The pull-down menu display

222Chapter 25MAC Address TableThis chapter contains instructions on how to view the dynamic and static addresses in the MAC address table of the switc

AT-S39 User’s Guide223Viewing the MAC Address TableTo view the MAC address table, perform the following procedure:1. From the Home page, select either

Section III: Web Browser Management224The options for displaying MAC addresses are described below.View All MAC AddressesThis option displays both sta

AT-S39 User’s Guide225CPUIndicates whether the traffic received on the port is sent to the switch’s CPU. Yes indicates that the traffic is being sent

Section III: Web Browser Management226Adding Static MAC AddressesYou can assign up to 255 static MAC addresses per port on the switch.To add a static

AT-S39 User’s Guide227Deleting MAC AddressesTo delete a static or dynamic MAC address from the switch, perform the following procedure:1. From the Hom

Section III: Web Browser Management228Changing the Aging TimeThe switch uses the aging time to delete inactive dynamic MAC addresses from the MAC addr

229Chapter 26Class of ServiceThis chapter contains instructions on how to configure CoS. This chapter contains the following procedure:❑ Configuring C

23Chapter 2Starting a Local or Telnet Management SessionThis chapter contains the procedure for starting a local or Telnet management session on an AT

Section III: Web Browser Management230Configuring CoSTo configure CoS, perform the following procedure:1. From the Home page, select Configuration.2.

231Chapter 27IGMP SnoopingThis chapter contains instructions on how to configure the IGMP snooping feature on the switch.NoteFor background informatio

Section III: Web Browser Management232Configuring IGMP SnoopingTo configure IGMP snooping from a web browser management session, perform the following

AT-S39 User’s Guide233Snoop TopologyDefines whether there is only one host node per switch port or multiple host nodes per port. Possible settings are

Section III: Web Browser Management234This parameter is useful with networks that contain a large number of multicast groups. You can use the paramete

235Chapter 28Broadcast Frame ControlThis chapter contains instructions on how to configure the broadcast frame control feature on the switch.NoteFor b

Section III: Web Browser Management236Configuring the Interval TimerThe interval timer defines the time period used in counting the number of broadcas

AT-S39 User’s Guide237Setting the Maximum Number of Broadcast FramesTo set the maximum number of broadcast frames you want the ports on the switch to

238Appendix AAT-S39 Default SettingsThis appendix lists the AT-S39 factory default settings.Settings DefaultIP Address 0.0.0.0Subnet Mask 255.255.0.0

AT-S39 User’s Guide239Management InterfacePassword admin (case-sensitive)User Name (web browser session only) managerTime Out Value 10 minutesTwisted

Section II: Local or Telnet Management24Local Management SessionOn the front panel of the switch is a port labelled RS232 Terminal Port. You use this

240IndexAaging timechanging, 139, 228defined, 129AT-S39 default settings, 41, 238AT-S39 software security, 43AT-S39 software updatesdownloading from a

AT-S39 User’s Guide241Ggateway address, 35, 180Hhello time, 85, 87, 208host nodesdefined, 144displaying, 149host/router timeout interval, 147, 233IIEE

242SSecure level, port security, 66serial number, switch, 45slave switch, defined, 50SNMP community strings, 39, 184SNMP management session, 21, 43sno

AT-S39 User’s Guide25Starting a LocalManagementSessionTo start a local management session, perform the following procedure:1. Connect one end of a str

Section II: Local or Telnet Management26NoteThe switch has an auto-detect feature that automatically determines the speed of the terminal. You use thi

AT-S39 User’s Guide27To select a menu item, type the corresponding letter or number.Pressing the Esc key from a submenu or window returns you to the p

Section II: Local or Telnet Management28Quitting from aLocal SessionTo quit a local session, return to the Main Menu and type Q for Quit. You should a

AT-S39 User’s Guide29Telnet Management SessionYou can use the Telnet application protocol from a workstation on your network to manage an AT-8024, AT-

3Table of ContentsList of Figures ...

Section II: Local or Telnet Management30Quitting from aTelnetManagementSessionTo end a Telnet management session, return to the Main Menu and type Q f

31Chapter 3Basic Switch ParametersThis chapter contains a variety of information and procedures. There is a discussion on when to assign an IP address

Section II: Local and Telnet Management32When Does a Switch Need an IP Address?One of the tasks to building or expanding a network is deciding which o

AT-S39 User’s Guide33If you do not plan to remotely manage any of the AT-8024, AT-8024GB, and AT-8026FC Fast Ethernet Switches in your network, then y

Section II: Local and Telnet Management34Configuring an IP Address and Switch NameThe procedure in this section explains how to manually assign an IP

AT-S39 User’s Guide352. Change the parameters as desired. The parameters in the IP Parameters window are described below:1 - IP addressThis parameter

Section II: Local and Telnet Management36CautionDo not include spaces or special characters, such as asterisks (*) or exclamation points (!), in a pas

AT-S39 User’s Guide37Activating the BOOTP and DHCP ServicesThe BOOTP and DHCP application protocols were developed to simplify network management. The

Section II: Local and Telnet Management38The System Configuration Menu in Figure 4 is displayed.Figure 4 System Configuration Menu2. Type 4 to select

AT-S39 User’s Guide39Configuring SNMP Community Strings and Trap IP AddressesTo configure the SNMP community strings for the switch and to assign up t

Table of Contents4Chapter 3Basic Switch Parameters ...

Section II: Local and Telnet Management404. Adjust the parameters as desired. To change a value, type its corresponding number and, when prompted, ent

AT-S39 User’s Guide41Activating the AT-S39 Software Default ValuesThe procedure in this section returns all AT-S39 software parameters to their defaul

Section II: Local and Telnet Management42Resetting a SwitchTo reset a switch, perform the following procedure:1. From the Main Menu, type 4 to select

AT-S39 User’s Guide43Configuring the AT-S39 Software Security FeaturesThe AT-S39 software has three features that can help prevent unauthorized indivi

Section II: Local and Telnet Management44For example, if you specify 2 minutes, the AT-S39 management software automatically ends a management session

AT-S39 User’s Guide45Viewing the AT-S39 Version Number and Switch MAC AddressThe procedure in this section displays the following switch information:❑

46Chapter 4Enhanced StackingThis chapter explains the enhanced stacking feature. The sections in this chapter include:❑ Enhanced Stacking Overview on

AT-S39 User’s Guide47Enhanced Stacking OverviewThe enhanced stacking feature can make it easier for you to manage the AT-8024, AT-8024GB, and AT-8026F

Section II: Local and Telnet Management 482. You must assign the master switch an IP address and subnet mask.A master switch must have an IP address a

AT-S39 User’s Guide49Example Figure 8 is an example of the enhanced stacking feature.Figure 8 Enhanced Stacking ExampleThe example consists of a netw

5Chapter 10Virtual LANs ...

Section II: Local and Telnet Management 50Setting a Switch’s Enhanced Stacking StatusThe enhanced stacking status of the switch can be master switch,

AT-S39 User’s Guide51The window displays the current status of the switch at the end of selection “1 - Switch State.” For example, the switch’s curren

Section II: Local and Telnet Management 52Selecting a Switch in an Enhanced StackThe first thing that you should do before performing any procedure on

AT-S39 User’s Guide533. Type G to select Get/Refresh List of Switches.The Master switch polls the network for all slave and Master switches in the sub

54Chapter 5Port ParametersThe chapter contains procedures for viewing and changing the parameter settings for the individual ports on a switch. This c

AT-S39 User’s Guide55Displaying Port StatusTo display the status of the ports on the switch, perform the following procedure:1. From the Main Menu, ty

Section II: Local and Telnet Management56The Port Status window is displayed. Figure 12 is an example of the window.Figure 12 Port Status WindowThe i

AT-S39 User’s Guide57MDIThe operating configuration of the port. Possible values are Auto, MDI, MDI-X. The status Auto indicates that the port is auto

Section II: Local and Telnet Management58Configuring Port ParametersTo configure the parameter settings for a port on the switch, perform the followin

AT-S39 User’s Guide59NoteThe Port Configuration window in the figure above is for a 10/100 Mbps twisted pair port. The window for a GBIC module in an

Table of Contents6Chapter 16Management Software Updates ...

Section II: Local and Telnet Management60Flow ControlFlow control applies only to ports operating in full-duplex mode. The switch uses a special pause

AT-S39 User’s Guide61B - Broadcast ControlFor background information on this selection and instructions on how to set the option, refer to Broadcast F

Section II: Local and Telnet Management62Displaying Uplink InformationThe AT-S39 management software can display basic manufacturer information about

AT-S39 User’s Guide63The management software displays a window containing basic information about the GBIC module. Figure 15 is an example of the wind

64Chapter 6Port SecurityThis chapter contains the procedures for setting port security. The sections in this chapter include:❑ Port Security Overview

AT-S39 User’s Guide65Port Security OverviewThe port security feature can enhance the security of your network. You can use the feature to control the

Section II: Local and Telnet Management66SecureThis security level instructs the switch to forward frames based solely on static MAC addresses. When t

AT-S39 User’s Guide67Configuring Port SecurityNotePort security can only be set through a local management session, You cannot set port security from

Section II: Local and Telnet Management68❑ To stop the switch from learning new dynamic MAC addresses and have it forward frames based only on static

AT-S39 User’s Guide69Configuring the Limited Security ModeThe Limited security mode lets you set a maximum number of dynamic MAC addresses each port o

7Chapter 25MAC Address Table ...

Section II: Local and Telnet Management704. Type 2 to select Set MAC limits per port.The Set MAC Limit Menu in Figure 18 is displayed.Figure 18 Set M

AT-S39 User’s Guide71The dynamic MAC address limits are applied to the ports on the switch. Limited security has now been configured on the switch. 14

72Chapter 7Port TrunkingThis chapter contains the procedures for creating and deleting port trunks. Sections in the chapter include:❑ Port Trunking Ov

AT-S39 User’s Guide73Port Trunking OverviewPort trunking is an economical way for you to increase the bandwidth between two switches. A port trunk is

74❑ When cabling a trunk, the order of the connections should be maintained on both nodes. The lowest numbered port in a trunk on the switch should be

AT-S39 User’s Guide75Creating a Port TrunkThis section contains the procedure for creating a port trunk on the switch. Be sure to review the guideline

763. Type 1 to select Trunk Ports.The following prompt is displayed.Enter Trunk Port(s) ->4. Enter the ports that will constitute the port trunk an

AT-S39 User’s Guide77Deleting a Port TrunkCautionDisconnect the cables from the port trunk on the switch before performing the following procedure. De

78Chapter 8Port MirroringThis chapter contains the procedures for creating and deleting a port mirror. Sections in the chapter include:❑ Port Mirrorin

AT-S39 User’s Guide79Port Mirroring OverviewThe port mirroring feature allows you to unobtrusively monitor the traffic being received and transmitted

8List of FiguresFigure 1: Connecting a Terminal or PC to the RS232 Terminal Port ...

80Creating a Port MirrorTo create a port mirror, perform the following procedure:1. From the Main Menu, type 1 to select Port Menu.2. From the Port Me

AT-S39 User’s Guide81Deleting a Port MirrorTo delete a port mirror, perform the following procedure:1. From the Main Menu, type 1 to select Port Menu.

82Chapter 9Spanning Tree ProtocolThis chapter provides introductory information on the Spanning Tree Protocol (STP) and explains how to adjust the STP

AT-S39 User’s Guide83STP OverviewThe AT-8024, AT-8024GB, and AT-8026FC Fast Ethernet Switches support the Spanning Tree Protocol, as specified in the

Section II: Local and Telnet Management84Finding andResolvingRedundantPathsOnce the Root Bridge has been selected, the bridges must determine if the n

AT-S39 User’s Guide85HandlingTopologyChangesIf there is a change in the network topology due to a failure, removal, or addition of any active componen

Section II: Local and Telnet Management86Configuring a Bridge’s STP SettingsThis section contains the procedure for configuring a bridge’s STP setting

AT-S39 User’s Guide872 - Bridge IdentifierThe MAC address of the bridge. The bridge identifier is used as a tie breaker when selecting the root bridge

Section II: Local and Telnet Management88Configuring STP Port SettingsTo adjust STP port parameters, perform the following procedure:1. From the Main

AT-S39 User’s Guide892 - Path CostThe spanning tree algorithm uses the cost parameter to decide which port provides the lowest cost path to the root b

9Figure 38: MAC Address Table Menu ...

90 Chapter 10Virtual LANsThis chapter contains basic information about virtual LANs (VLANs). It also contains the procedures for creating, modifying,

AT-S39 User’s Guide91VLAN OverviewA VLAN is a group of ports on an Ethernet switch that form a logical Ethernet segment. The ports of a VLAN form an i

Section II: Local and Telnet Management92But with VLANS, you can change the LAN segment assignment of an end node connected to the switch through the

AT-S39 User’s Guide93Port-based VLAN OverviewAs explained in the VLAN Overview section earlier in this chapter, a VLAN consists of a group of ports on

Section II: Local and Telnet Management94If a VLAN spans multiple switches, then the VID for the VLAN on the different switches must be the same. In t

AT-S39 User’s Guide95For example, assume that you were creating a port-based VLAN on a switch and you had assigned the VLAN the VID 5. Consequently, t

Section II: Local and Telnet Management96Drawbacks toPort-basedVLANsThere are several drawbacks to port-based VLANs:❑ It is not easy to share network

AT-S39 User’s Guide97Port-basedExample 1Figure 24 illustrates an example of one AT-8024 Fast Ethernet Switch with three port-based VLANs. (For purpose

Section II: Local and Telnet Management98In the example, each VLAN has one port connected to the router. The router interconnects the various VLANs an

AT-S39 User’s Guide99The table below lists the port assignments for the Sales, Engineering, and Production VLANs on the switches:❑ Sales VLAN - This V