Dell 28XX manuale d’uso

www .dell.com | support.dell.com Dell™ PowerConnect™ 28xx Systems User Guide[...]

Notes, Notices, and Cautions NOTE: A NOTE indicates important info rmation that helps you make better use of your computer . NOTICE: A NOTICE in dicates either potential dama ge to hardware or loss of data and tells you how to avoid the problem. CAUTION: A CAUTION indicates a potential for pro perty damage, personal injury , or death. _____________[...]

3 Contents 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 System Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 PowerConnect 2808 . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 PowerConnect 2816 . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 PowerConnect 2824 . . . . . .[...]

4 Power Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Internal Power Supply Connector . . . . . . . . . . . . . . . . . . . . 26 3 Installing the PowerConnect Device . . . . . . . . . . . . . . 27 Installation Prec autions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Site Requirements . . . . . . . . . . [...]

5 Initial Configuration Through the W eb . . . . . . . . . . . . . . . . . . . . 48 Basic Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Retrieving an IP Address From a DHCP Server . . . . . . . . . . . . . 49 Star tup Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Software Download . . . . . . . .[...]

6 Defining SNMP Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . 73 Defining SNMP Global Parameters . . . . . . . . . . . . . . . . . . . 74 Defining Communities . . . . . . . . . . . . . . . . . . . . . . . . . . 75 Defining SNMP Noti fication Reci pients . . . . . . . . . . . . . . . . . 77 Managing Files . . . . . . . . . . . . . .[...]

7 Configuring VLANs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124 Defining VLAN Members . . . . . . . . . . . . . . . . . . . . . . . 124 VLAN Port Membership T able . . . . . . . . . . . . . . . . . . . . 126 Defining VLAN Ports Settings . . . . . . . . . . . . . . . . . . . . . 128 Defining VLAN LAG Settings . . . . . . . . . . . . [...]

8 Using the CLI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154 Command Mode Overview . . . . . . . . . . . . . . . . . . . . . . 154 User EXEC Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 154 Privileged EXEC Mode . . . . . . . . . . . . . . . . . . . . . . . . 155 Global Configuration Mode . . . . . . . . . . . . [...]

Dell PowerConnect 28xx Systems User Guide 9 1 Introduction This User ’s Guide contains the information needed f or installing , configuring and maint aining the P o werConnect 2808, P owerConnect 2816, P owe rConnect 2 824, and P owerCon nect 2848 W eb- managed Gigabit Ethernet switches. The P owerConnect 28xx switches ca n be used to connect wor[...]

10 Dell PowerConnect 28xx Systems User Guide Figure 1-2. PowerConnect 2816 Front Panel The P o werConnect 2816 supports the following ports: • 16 Gigabit Ethernet copper ports PowerConnect 2824 The following figur e illustrates th e P owerConnect 2 824 front panel. Figure 1-3. PowerConnect 2824 Front Panel The P o werConnect 2824 supports the fol[...]

Dell PowerConnect 28xx Systems User Guide 11 Summary of PowerCon nect Models The following table summarizes the P owerConnect models. Features General Features Management Modes The device supports the following modes: • Managed Mode — P rovides switch management through the web interface. • Unmanaged Mode — In this mode, the device operates[...]

12 Dell PowerConnect 28xx Systems User Guide Auto Negotiation Aut o negotiation allo ws an Ethernet switch to ad vertise modes of operatio n. The auto negotiation function provides the means to ex change informatio n between two Ethernet switches that share a point- to-point link segment, and to automatically configure both Ethe rnet switches to ta[...]

Dell PowerConnect 28xx Systems User Guide 13 MAC Address Supported Features MAC Address Capacity Support The P owerConnect 2808, 2816, 2824 switch es support a total of 8K MAC addr esses , and the P owerConnect 2848 supports a total of 16K MAC addresses. Auto-Learning MAC Addresses The switch enables M AC address auto-learning from incoming pa cket[...]

14 Dell PowerConnect 28xx Systems User Guide • Short-Reach — Reduction of power over Ether net cables shorter than 40m. IGMP Snooping Internet Group Membership P rotocol (IGMP) Snooping e xamines IGMP frame contents, when they ar e forwarded by the device fr om work st ations to an upstream Multicast router . F rom the frame, the device identif[...]

Dell PowerConnect 28xx Systems User Guide 15 • Higher bandwidth connections • Improved bandwidth granularity • High bandwidth server connectivity A LAG is compo sed of ports wi th the same s peed set to full-du plex operation. DHCP Server Dynamic Host Configuration P rotocol is a method of managing network parameter assignment from a single D[...]

16 Dell PowerConnect 28xx Systems User Guide Class of Service (CoS) Featur es The P o werConnect 28xx system enables users to define various services fo r traffic classes of service. The underlying mechanism for supporting bandwidth man agement and control is based on the use of multiple priority queues for classifying traffi c. The switches suppor[...]

Dell PowerConnect 28xx Systems User Guide 17 2 Hardware Description Switch Port Configurations PowerConnect 28x x Front and Back Panel Port Desc ription The Dell™ P o werConnect™ 28xx switches use 10/ 100/1000BASE- T ports on the front panel for connecting to a network. The Gigabit Ethernet po rts can operate at 10, 100 or 100 0 Mbps. These por[...]

18 Dell PowerConnect 28xx Systems User Guide Figure 2-2. PowerConnect 2808 Back Panel Figure 2-3. PowerConnect 2816 Front Panel On the front panel there ar e 16 ports which are number ed 1 to 16, top down and left to right. On each port there ar e LEDs to indicate the port status. On the left side of the front panel is the Mana ged Mode LED which i[...]

Dell PowerConnect 28xx Systems User Guide 19 Figure 2-5. PowerConnect 2824 Front Panel On the front panel there ar e 24 ports which are number ed 1 to 24, top down and left to right. On each port there ar e LEDs to indicate the port status. Th er e are two SFP (Small F orm-F actor Plugable) ports, designated as ports 23 and 24, fo r fiber connectio[...]

20 Dell PowerConnect 28xx Systems User Guide Figure 2-6. PowerConnect 2824 Back Panel Figure 2-7. PowerConnect 2848 Front Panel On the front panel there ar e 48 ports, which are number ed 1 to 48, top down and left to right. On each port, there ar e LEDs to indicate the port status. Th ere ar e four SFP (Small F orm-F actor Plugable) ports, designa[...]

Dell PowerConnect 28xx Systems User Guide 21 button, located on the right side on the fr ont panel is used to tra nsition between management modes and to reset t he device. F or more information about management modes and transitioning between them, see "Management Mo des" on page 49. F ans are provided on the side panel. The back panel c[...]

22 Dell PowerConnect 28xx Systems User Guide Power LED On the P owerConnect 28xx front panel ther e is a P ower LED. The following table describes the P ower Supply status LED indications. Managed Mode LED On the P owerConnect 28xx front panel ther e is a Managed Mode LED moni tori ng the switch node as well as indicating diagnostic test results. T[...]

Dell PowerConnect 28xx Systems User Guide 23 Figure 2-9. RJ-45 Copper -bas ed 10/100/100 0BASE-T LEDs The RJ-45 LED indications are de scribed in the following table: SFP Port LED The following table describe s the SFP LED indications. Managed Mode Butt on The P owerConnect 28xx has a Mode push button on th e front panel. The Mode button is for cha[...]

24 Dell PowerConnect 28xx Systems User Guide Cables, Port Connections, and Pinout Information This section e xplains th e switch physical interfaces, and provides information about cables and port connections. Copper cable di agnostics are supported. Hi gh-speed workstations, hubs, routers, or other switches are connected t h rough standard RJ-45 c[...]

Dell PowerConnect 28xx Systems User Guide 25 SFP Ports The P owerConnect 2824 switch supports two SFP tra nsceivers combo ports, an d the P owerConnect 2848 switch supports four SFP transceivers combo ports for various fiber-based mo dules (1000BASE-SX or 1000BASE-LX). Only one of the two physical connections of a combo po rt can be used at any tim[...]

26 Dell PowerConnect 28xx Systems User Guide Power Connectors The P owerConnect 28xx is power ed by using the AC internal power supply . Internal Power Supply Connector The P owerConnect 28xx supports a single internal power supply to provide power for switching operations. The internal power supply supports input voltages between 100 and 240 V AC.[...]

Dell PowerConnect 28xx Systems User Guide 27 3 Installing the PowerConnect Device This section contains information about device unpacking, location, installation, and cable connections. Installation Precautions CAUTION Before performing any of the following procedures, read and follow the safety instructions located in the System Information Guide[...]

28 Dell PowerConnect 28xx Systems User Guide Site Requirements The P owerConnect 28xx can be mounted in a standa rd equipment rack, placed on a tabl etop, or mounted on the wall. Before installing the device, verify that the site selected for the de vice meets the following s ite req ui re me n ts : • Po w e r — The device is installed within 1[...]

Dell PowerConnect 28xx Systems User Guide 29 5 Inspect the product for damage. Report any damage immediately . Mounting the Device Overview There are thr ee device mounting options : • Installing in a Rack • Installing on a Flat Surf ace • Installing on a W all Device Rack Installation CAUTION Read the safety information in the Product Inform[...]

30 Dell PowerConnect 28xx Systems User Guide Figure 3-1. Bracket Installation for Rack Mounting 2 Insert the supplied scre ws into the rack mo unting holes and tighten with a screwdriver . 3 Repeat the process for the rack-mounting bracket on the other side of the device. 4 Insert the device into the rack, ensuring the ra ck-mounting holes on the d[...]

Dell PowerConnect 28xx Systems User Guide 31 Installing on a W all T o mount the device on a wall: 1 Ensure that the mounting location meets the following requirements: • The surface of the wall must b e capable of supporting the device. • Allow at least 2 inches (5.1 cm) space on the si des for proper ventilation and 5 inches (12. 7 cm) at the[...]

32 Dell PowerConnect 28xx Systems User Guide 6 On the wall mark the locations where the scre ws to hold the device must be prepar ed. 7 On the marked locations, drill the holes and place all plugs (not provided) in the holes. 8 Secure the device to the wall with screws (not pr ovided). Ensure that the ventilation holes are not obstructed. Figure 3-[...]

Dell PowerConnect 28xx Systems User Guide 33 Connecting the Device T o configur e the device, the device must be connected to a terminal. Connecting the Devi ce to the Network T o connect to an uplink port, use Category 5 Un shielded T wiste d-P air ( UTP) cables with RJ-45 connectors at both ends. The RJ-45 ports on the Et hernet device support au[...]

34 Dell PowerConnect 28xx Systems User Guide b Set the data rate to 9600 baud. c Set the data format to 8 data bi ts, 1 stop bit, and no parity . d Set flow control to none. e Under P rop erties, select VT100 for Emulation mode. f Select T erminal keys for F unction, Arrow , and Ctrl keys. Ensure that the setting is for T erminal keys (not W indow [...]

Dell PowerConnect 28xx Systems User Guide 35 Figure 3-4. Connecting to Power Supply 3 After connecting the device to a power source, confirm tha t the device is connecte d and operating correctly by e xamining the LEDs on the front panel. Port Connections, Cables, and Pinout Information This section e xplains th e device’s physical interfaces, an[...]

36 Dell PowerConnect 28xx Systems User Guide T able 3-1. Ports, Connectors and Cables The RJ-45pin number allocation for the 10/100/1 000BaseT ports is listed in the table following. T able 3-2. RJ-45 Pin Number Allocati on for 10/100/1000B aseT Ethernet Port Connect or Port/Inter face C able RJ-45 10/100/1000BaseT P ort Cat.5 Pin No Fu n c t i o n[...]

Dell PowerConnect 28xx Systems User Guide 37 Port Default Settings The general information for configuring the device ports includes the short description of the auto- negotiation mechanism and the defaul t settings for switch ing ports. Auto-Negotiation Auto-negotia tion enabl es auto matic detection of speed, duplex mode and flow control on switc[...]

38 Dell PowerConnect 28xx Systems User Guide Switching Port Default Settings The following table gives th e port defaul t settings . T able 3-3. Port Default Settings Function Default Setting P ort speed and mode 10/100/1000BaseT copper : auto-negotiation full duplex P ort forwarding state Enabled P ort tagging No tagging Flow Control On Back P res[...]

Dell PowerConnect 28xx Systems User Guide 39 4 43+ Starting and Configuring the Device After completing all e xternal conn ections, the device must be co nfigur ed. This section describes various methods of configuring the device. NOTE: The P owerConnect 2808 has an internal serial port. NOTE: Before proceeding, read the release notes for this prod[...]

40 Dell PowerConnect 28xx Systems User Guide Figure 4-1. Installation and Configuration Flow Management Modes The device can be run in Managed or Unmanaged mode . By default, the device is in Unmanaged mode. These modes are described below : • Managed Mode — In this mode: – Switch can be managed through the web interface. – Manage d Mode LE[...]

Dell PowerConnect 28xx Systems User Guide 41 – The current running configuration is automatically sa ved to local storage. If the system is switched to unmanaged mode via the Managed Mode bu tton, the system does not load the saved configuration, but it is still maintain ed in the device’s local stora ge. – F rom Managed mode, you can move to[...]

42 Dell PowerConnect 28xx Systems User Guide T ransitioning Between Modes F igure 4-5 shows the transition between Manage d, Secure and Unmanaged operating modes: Figure 4-2. T ransitioning Between Management Modes Note the following points: • The Managed Mode LED des ignates whether the manage ment interface is active on th e switch. The LED is [...]

Dell PowerConnect 28xx Systems User Guide 43 • P ower cycle returns the switch to the same st ate that existed prior to the power cycle, and configuration is preserved. • The user can only save or restor e configurations while in Managed mode. There is no management interface available in Secure or Unmanaged mode to enable the user to modify , [...]

44 Dell PowerConnect 28xx Systems User Guide – Use Saved IP/User Name/P assw ord — When restoring local configurat ion, this option uses the IP address, user name and password that were au tomatically saved when you exited Managed mode. When restoring a saved configuration, this option uses the IP address, user name and password inside the save[...]

Dell PowerConnect 28xx Systems User Guide 45 • The PowerConnect device booted successfully . • The console connection is established and t he console prompt is displayed on the screen of a VT100 terminal device. (Press the <Enter> key severa l times to verify that the prompt displays correctly .) The system prompts you to use the Set-up w[...]

46 Dell PowerConnect 28xx Systems User Guide Wizard Step 1 The following information displays: The system is not setup for SNMP management by default. To manage the switch using SNMP (required for Dell Network Manager) you can: *Setup the initial SNMP Version 2 account now *Return later and setup additional SNMP v1/v2 accounts For more information [...]

Dell PowerConnect 28xx Systems User Guide 47 Enter the user name<1-20>:[admin] Please enter the user password:***** Please reenter the user password:***** Wizard Step 3 The following information displays: Next, an IP address is set up. The IP address is defined on the default VLAN,(VLAN #2). This is the IP address you use to access the Telnet[...]

48 Dell PowerConnect 28xx Systems User Guide Wizard Step 4 The following information displays: Finally, setup the default gateway. Please enter the IP address of the gateway from which this network is reachable(e.g. 192.168.1.1).Default gateway (A.B.C.D):[10.6.22.97] Enter the default gateway . P ress Enter . The following is displayed (a s per the[...]

Dell PowerConnect 28xx Systems User Guide 49 1 Connect the switch to a PC via Ethernet, and set a static IP address of 192.1 68.2.x 255.255.255.0 (where x is between 2 and 254) on the PC. 2 Connect to the switch using IP address 192.168.2.1 in your web browser . The login is: username = admin with no password. 3 After connecting to the device, use [...]

50 Dell PowerConnect 28xx Systems User Guide Startup Menu The procedures called from the Startup menu cove r software download, flas h handling and password recovery . The diagnostics procedures are for use by technical support personnel only and are not disclo sed in the document. The Startup menu can be entered when booting the device, user input[...]

Dell PowerConnect 28xx Systems User Guide 51 [4] Enter Diagnostic Mode [5] Set Terminal Baud-Rate [6] Back Enter your choice or press 'ESC' to exit The following sections describe th e available Startup menu options. NOTE: When selecting an option form the Startup menu, time out must be taken into accou nt: if no selection is made within [...]

52 Dell PowerConnect 28xx Systems User Guide 3 Enter config as the name of the flash file. Th e configuration is erased an d the device reboots. 4 Repeat the device initial configuration. Password Recovery If a password is lost , the P asswor d Recovery proc edure can be called from the Startup menu . The procedure enables entry to the device once [...]

Dell PowerConnect 28xx Systems User Guide 53 4 Enter the reload command. The following message is displayed: console# reload This command will reset the whole sy stem and disconnect your current session. Do you want to continue (y/ n) [n]? 5 Enter y . The device reboots. Boot Image Download Loading a new boot image fr om the TFTP server an d progra[...]

Dell PowerConnect 28xx Systems User Guide 54 5 Using Dell OpenManage Switch Administrator This section prov ides an intro duction to the user interface. Understanding the Interface The home page contains the following views: • T ree V iew — Located on the left side of the home page, the tree view provides an e x pandable view of the features an[...]

Dell PowerConnect 28xx Systems User Guide 55 Using the Switch Administrator Buttons This section describes the buttons found on the OpenManage Switch Administrator interface. Information Buttons Information buttons provide access to on-line support and online help, as well as information ab out the OpenManage Switch Admi nistrator interfaces. T abl[...]

56 Dell PowerConnect 28xx Systems User Guide Device Manageme nt Buttons Device Management buttons provide an easy method of configuring device inform ation, and includes the following: Starting the Application 1 Open a web browser . 2 Enter the device’s IP address (as defined in the CLI) in the address bar and press <Enter>. F or informatio[...]

Dell PowerConnect 28xx Systems User Guide 57 • Management — This is a read-write mode where you ca n see and edit all pages of the interface. • Monitor — This is a read-only mode wh ere you can see a subset of the interface pages, but you cannot edit them. F or more informat ion about setting the access level, see ("Defining the Loca l[...]

Dell PowerConnect 28xx Systems User Guide 58 6 Configuring System Information This section provides in formation for defining system pa rameters including secu rity features, downloading device soft ware, and re setting the device. T o open the System page, click System in the tree view . Figure 6-1. System Defining General Device Information The G[...]

Dell PowerConnect 28xx Systems User Guide 59 Figure 6-2. Asset • System Name (0- Characters) — Defines the user -defined device name. • System Contact (0- Characters) — Specifies the name of the contact person. • System Location (0- Characters) — Specifies the location where th e system is curr ently running. • MAC Address — Specifi[...]

60 Dell PowerConnect 28xx Systems User Guide 3 Click Apply Changes . The system parameters are defined, and the device is updated. Initiating a T elnet Session: 1 Open the Asset page. 2 Click Te l n e t . A T elnet se ssion is initiated. Viewing the V ersions Page The Ve r s i o n s page contains information about the hardwar e and software version[...]

Dell PowerConnect 28xx Systems User Guide 61 Resetting the Device The Res et page enables the device to be r eset from a re mote location. F or more information about saved Configuration file s, see "Man aging F iles" on pa ge 79 . To o p e n t h e Re se t page , click System  General  Res e t in the tree view . Figure 6-4. Reset Re[...]

62 Dell PowerConnect 28xx Systems User Guide Entering Secure M ode The Secure Mode page allows you to put the device in the Secure management mode. Once enabled, it prevents users from making any furt her configuration changes to the sw itch. This is done by r emoving the IP address of the switch so that it becomes inaccessible. In Secure Mode the [...]

Dell PowerConnect 28xx Systems User Guide 63 Defining Device IP Addresses The IP Addressing page contains a link to the IP Interface P arameters page that is used to assign the device IP address, subnet ma sk and default gateway , and fo r enabling or disabling DHCP . T o open the IP Addressing page, click System  IP Addressing in the tree view [...]

64 Dell PowerConnect 28xx Systems User Guide Running Cable Diagnostics The Diagnostics section contains links to pa ges for performing virtual cable tests on copper cables and optical transceivers. T o open the Diagnostics page, click System  Diagnostics in the tree view . • Viewing Optical T ransceiver Diagnostics (Appl icable only for 24, 48[...]

Dell PowerConnect 28xx Systems User Guide 65 • Cable F ault Distance — The distance from the port where the cable error occurred. • Last Update — The last time the port was tested. • Approximate Cable Length — The approximate cable length. This test can only be performed when the port is up and operating at 1 Gbps. Performing a Cable T [...]

66 Dell PowerConnect 28xx Systems User Guide Figure 6-8. Optical T ransceiver Diagnostics The Optical T r ansceiver Diagnostics page contains th e following fie lds: • Po r t — The port to which the fiber cable is connected. • Te m p e r a t u r e — The tempe rature (in Celsius) at which the cable is operating. • Vo l t a g e — The volt[...]

Dell PowerConnect 28xx Systems User Guide 67 • Po r t — The port to which the fiber cable is connected. • Te m p e r a t u r e — Internally measured transceiver te mperature. • Vo l t a g e — Internally measured supply voltage. • Current — Measured TX bias curr ent. • Output P ower — Measured TX output power in milliwatts . • [...]

68 Dell PowerConnect 28xx Systems User Guide Managing Device Security The Manageme nt Security page provides access to security pages that contain fields for setting security parameters for user data base, passwor d and RADIUS security . T o open the Manage ment Security page , click System  Management Security in the tree view . Defining the Lo[...]

Dell PowerConnect 28xx Systems User Guide 69 4 Click Apply Changes . The user access rights and passwords are defined, and the d evice is updated. Defining a New User: 1 Open the Loc al Us er D at aba se page. 2 Click Add . The Add User page opens: Figure 6-10. Add a User 3 Define the fields. 4 Click Apply Changes . The new user is defined, and the[...]

70 Dell PowerConnect 28xx Systems User Guide Deleting Users: 1 Open the Loc al Us er D at aba se page. 2 Click Show All. The Local User T able opens. 3 Select a User Name. 4 Select the Rem ov e check box. 5 Click Apply Changes . The selected user is deleted and the device is updated. Configuring RADIUS Global Parameters Remote Authorization Dial-In[...]

Dell PowerConnect 28xx Systems User Guide 71 • Authenti cation P ort — Identifies the authentication port. The authentication port is used to verify the RADIUS server authentication. • Number of Retries (1-10) — Specifies the number of transmitted requests sent to RADIUS server before a failure occurs. The possible field va lues are 1 - 10.[...]

72 Dell PowerConnect 28xx Systems User Guide Figure 6-13. Add RADIUS Server Page 3 Define the fields. 4 Click Apply Changes . The new RADIUS server is added, and the d evice is updated. Displaying the RADIUS Server List: 1 Open the R ADIUS Settings page. 2 Click Show All . The Show all RADIUS Servers page opens: Figure 6-14. Show all RADIUS Servers[...]

Dell PowerConnect 28xx Systems User Guide 73 3 Modify the relevant field s. 4 Click Apply Changes . The R ADIUS Server settings are modified, and the device is updated. Deleting a RADIUS Server for the RADIUS Servers List: 1 Open the R ADIUS Settings page. 2 Click Show All . The R ADIUS Servers List page opens. 3 Select a R ADIUS Server in the R AD[...]

74 Dell PowerConnect 28xx Systems User Guide Defining SNMP Global Parameters The SNMP Global P arameters page permits enabling both SNMP and Authentication notifications.T o open the SNMP Global P arameters page, click System  SN MP  Global P arameters in the tree view . Figure 6-15. Global Parameters • SNMP Notifications — Enables or dis[...]

Dell PowerConnect 28xx Systems User Guide 75 Defining Communities Access rights are managed by defining communities in the Community T able . When the community names are changed, access rights are also changed.T o open the SNMP Community page, click System  SNMP  Community in the tree view . Figure 6-16. SNMP Community • SNMP Management[...]

76 Dell PowerConnect 28xx Systems User Guide Figure 6-17. Add SNMP Community 3 Select one of the following: – SNMP Management Station — Defines an SNMP community for a specif ic management station. – All — Defines an SNMP community for all management stations. 4 Define the remaining fields. 5 Click Apply Changes . The new community is saved[...]

Dell PowerConnect 28xx Systems User Guide 77 3 Select a community from the Community T able. 4 Select the Rem ov e check box. 5 Click Apply Changes . The selected community entry is de leted, and the device is upda ted. Defining SNMP Notification Recipients The Notification R ecipients page contains informatio n for defining filters that determine [...]

78 Dell PowerConnect 28xx Systems User Guide Adding a new T r ap Recipients 1 Open Notification R ecipients page. 2 Click Add . The Add Notification Recipients page opens: 3 Define the relevant fields. 4 Click Apply Changes . The notifica tion recipient is a dded, and the device is updated. Displaying Notification Recipients T ables 1 Open Notifica[...]

Dell PowerConnect 28xx Systems User Guide 79 4 Check the Rem ov e checkbox. 5 Click Apply Changes . The recipient is deleted, and the device is updated. Managing Files The F ile Manageme nt section contains fields for managin g de vice software, the Image F iles, an d the Configuration F iles. F iles can be downloaded from a TFTP server . The confi[...]

80 Dell PowerConnect 28xx Systems User Guide Figure 6-21. File Download From Server • Fi r m w a r e D o w n l o a d — The F irmware file is downloaded. If Fi r m w a r e D o w n l o a d is selected, the Configuration Download fields are grayed out. • Configuration Download — The Configuration fil e is downloaded. If Configurat ion Download[...]

Dell PowerConnect 28xx Systems User Guide 81 Configuration Download • Server IP Address — The Server IP Address from which the configuration files a re downloaded. • Source F ile Name — Indicates the configuration files to be downloaded. During the imag e file download, a dialog box opens which displays the download progress. Downloading Fi[...]

82 Dell PowerConnect 28xx Systems User Guide The F ile Upload to Server page contains the following fields: • Upload via TFTP — Enables initiating upload via the TFTP server . • Upload via HTTP — Enables initiating upload via the FT P server . • Server IP Address — The Server IP A ddress to which the file is uploade d. • Destination F[...]

Dell PowerConnect 28xx Systems User Guide 83 Defining DHCP Server Settings The DHCP server is used mainly for centrali zed control over assignmen t of IP addresses to attached hosts. A switch can operate as either a DHCP client (obt aining its own IP from a DHCP server) as a DHCP server . The DHCP server uses a fine d pool of IP addresses (u ser -d[...]

84 Dell PowerConnect 28xx Systems User Guide Figure 6-24. DHCP Server Properties • DHCP Server Status — Indicates if the DHCP server is en able d. The possible field values are: – Enable — Enables the DHCP server . – Disable — Disables the DHCP se rver . This is the default value. • DHCP Ping — Indicates if the DHCP server is set to[...]

Dell PowerConnect 28xx Systems User Guide 85 5 Define the amount of time (in milliseconds) the DHCP server waits for a ping reply in the DHCP Pin g Tim eo u t field, or click Use Default to select the default ti meout of 500 milliseconds. 6 Click Apply Changes . The server is enabled. Defining Network Pool The Network P ool page displa ys the DHCP [...]

86 Dell PowerConnect 28xx Systems User Guide – Days — Specifies the duration of the lease in number of days. The range is 0 to 49710 days. – Hours — Specifies the number of hours in the lease. A days value must be supplied before an hours value can be add ed. The range is 0 to 23 hours. – Minutes — Specifies the number of minutes in the[...]

Dell PowerConnect 28xx Systems User Guide 87 The Excluded Addresses page lists the excluded addresses. T o open the Excluded Addresses page, click System  DHCP Server  Excluded Addresses in th e tree view . Figure 6-26. Excluded Addresses • Start IP Address — Displays the first IP address in the range of excluded IP addresses. • End IP [...]

88 Dell PowerConnect 28xx Systems User Guide 2 Check the Rem ov e checkbox next to an address. 3 Click Apply Changes . The addres s is deleted, and the device is updated. Manually Allocating IP Addresses (Static Hosts) The Static Hosts page is used to manually allocate IP addr esses to network hosts. T o open the Static Hosts page, click System [...]

Dell PowerConnect 28xx Systems User Guide 89 • Domain Name Server — Specifies the DNS server available to the DHCP client. • Domain Name— Specifies • NetBIOS WI NS Ser ver — Specifies the NetBIOS WINS server av ailable to a Microsoft DHCP stat ic host. • NetBIOS Node T ype — Informs the workstation how to resolv e the NetBIOS name. [...]

90 Dell PowerConnect 28xx Systems User Guide Figure 6-29. Add Static Host 3 Define the relevant fields. 4 Click Apply Changes . The static host is added, and the device is updated. Displaying Static Hosts T ables 1 Open the Static Hosts page. 2 Click Show All . The Static Hosts T able page opens: Figure 6-30. Static Hosts T able[...]

Dell PowerConnect 28xx Systems User Guide 91 Deleting Static Hosts 1 Open the Static Hosts page. 2 Click Show All . The Static Hosts T able p age opens. 3 Check the Rem ov e checkbox next to a static host. 4 Click Apply Changes . The host is del eted, and the device is u pdated. Address Binding The Address Binding page displays a list of the DHCP s[...]

92 Dell PowerConnect 28xx Systems User Guide Defining Advanced Settings The Advanced Settings page contains information for config uring general settings. Use Advanced Settings to set miscellaneous global attributes for the device. The changes to these attributes are applied only after the device is reset. T o open the Advanced Settings page, click[...]

Dell PowerConnect 28xx Systems User Guide 93 7 Configuring Device Switching This section provides all system operat ion and ge neral information for conf iguring netwo rk security , ports, Address tables, GARP , VLAN s, Spanning T ree, P ort Aggreg ation, and Multicast Support. Configuring Network Security The device enables network secu rity throu[...]

94 Dell PowerConnect 28xx Systems User Guide Advanced P ort Based Authenti cation is implemented in the following modes: • Single Host Mode — Enables only the author ized host for sin gle-session access to the p ort. • Multiple Host Mode — Enables multiple hosts to be attached to a single port, for single-session access. Only one host must [...]

Dell PowerConnect 28xx Systems User Guide 95 – None — No authentication method is used to authenticate the port. – RA D I U S — P ort authentication is performed using the RADIUS server . – RA D I U S , N o n e — P ort authentication is performed first using the RADIUS server . If the port is not authenticated, then no au thentication m[...]

96 Dell PowerConnect 28xx Systems User Guide Figure 7-2. Port Based Authentication T able T erminatio n Cause — The reason for which the port authentication was terminated. Copy T o Checkbox — Copies port parameters from one port to the selected ports. Select All — Selects all ports in the P ort Based Authenti cation T able . Copying Paramete[...]

Dell PowerConnect 28xx Systems User Guide 97 Configuring Advanced Po rt Based Authentication The Mult iple Hosts page provides information for defining adva nced port based authentication settings for specific ports. T o open the Multiple Hosts , click Switch  Network Security  Multiple Hosts . Figure 7-3. Multiple Hosts • Po r t — The po[...]

98 Dell PowerConnect 28xx Systems User Guide • T rap F requency (1-100000 0) (Sec) — Defines the time period by which traps are sent to the host. The T rap F requency (1-1000000) field can b e defined only if th e Multiple Hosts field is defi ned as Disable . The default is 10 seconds. • Status — The host status. The possible field value s [...]

Dell PowerConnect 28xx Systems User Guide 99 Authenticating Users The Authenticated Users page displays user port access lists. T o open the Authenticated Users page, click Switch  Network Security  Authent icated Users . Figure 7-5. Authenticated Users • User Name — List of users authoriz ed via the RADIUS Server . • Po r t — The por[...]

100 Dell PowerConnect 28xx Systems User Guide Figure 7-6. Authenticated Users T able[...]

Dell PowerConnect 28xx Systems User Guide 101 Configuring Ports The Po r t s page contains links to port functionality pages including adva nced features, such as Gr een Ethernet, Storm Control and P ort Mirroring. T o open the Po r t s page, click Switch  Po r t s . Defining Port Parameters The P ort Configuration page contains fields for defin[...]

102 Dell PowerConnect 28xx Systems User Guide – Active — The port is currently active and is cu rr ently receiving and transmitting traffic. – Disable — The port is currently disabled, and is no t currently r eceiving or transmitting traffic. • Admin Speed — The configured rate for the port. The port type determine s what speed setting [...]

Dell PowerConnect 28xx Systems User Guide 103 • LAG — Specifies if the port is part of a LAG. Defining Port Parameters 1 Open the Po r t C o n f i g u r a t i o n page. 2 Select a port in the Po r t Fi e l d . 3 Define the remaining fields. 4 Click Apply Changes . The port parameters are saved to the device. Modifying Port Parameters 1 Open the[...]

104 Dell PowerConnect 28xx Systems User Guide LAGs can be configured accor ding to the following load balancing types: Layer 2, Layer 2 and Layer 3 or Layer 3. The LAG Co nfiguration page contains fields for configurin g paramete rs for co nfigured LAGs. The device supports up to eight LAGs, and ea ch LAG can have up to eight members. F or informat[...]

Dell PowerConnect 28xx Systems User Guide 105 • Description (0-64 Characters) — Provides a user -defined description of the configured LAG. • LAG T ype — The port types that comprise the LAG. • Admin Status — Enables or disabl es traffic forwarding through the selecte d LAG. • Current LAG Status — Indicates if the LAG is currently o[...]

106 Dell PowerConnect 28xx Systems User Guide Displaying the LAG Configuration T able: 1 Open the LAG Con figuration page. 2 Click Show All. The LAG Configuration T ab le opens: Figure 7-10. LAG Configuration T able Configuring Green Etherne t Gree n Ethernet, also known as Energy Efficient Ethe rnet, is an effort to make networking equipment envir[...]

Dell PowerConnect 28xx Systems User Guide 107 Figure 7-11. Green Ethernet Configuration • Cumulative Energy Saved — The total amount of energy saved since the last reset. This amount is equal to the saved power multiplied by the time period in hours. – Res et — Click to set the Cumulative P ower Saved counter back to 0. • — Indicates wh[...]

108 Dell PowerConnect 28xx Systems User Guide – Oper — Whether Energy-Detect is cu rr ently in force for the port. – Rea so n — If Admin indicates that Ener gy-Detect is enabled and Oper indicates it is not in force, this column gives the reason. Reas ons may include that the Link T ype is not supported, or that the P ort Link is up. • Sh[...]

Dell PowerConnect 28xx Systems User Guide 109 Figure 7-12. Storm Control • Po r t — The port from which storm control is enabled. • Broadcast Control — Enables or disables forwarding br oadcast packet types on the device. • Mode — Specifies the Broadcast mode cu rrently enabled on the device. The possible field value are: – Unknown Un[...]

110 Dell PowerConnect 28xx Systems User Guide Figure 7-13. Storm Control T able Defining Port Mirroring Sessions P ort mirroring monitors and mirrors network traff ic by forwarding co pie s of incoming and outg oing packets from one port to a monitoring port. P ort mirroring is configured by sele cting a specific port to copy all packets, and diffe[...]

Dell PowerConnect 28xx Systems User Guide 111 The following restrictions apply to po rts configur ed to be source ports: • Source ports cannot be a LAG member . • Source ports cannot be configured as a de stination port. • All pack ets are transmitted tagged from the destination port. • Monitor ed all RX/TX packets to the same port. T o ope[...]

112 Dell PowerConnect 28xx Systems User Guide 5 Define the Ty p e field. 6 Click Apply Changes . The new source po rt is defined, and th e device is upd ated. Deleting a Copy Port from a Port Mirroring Session 1 Open the P ort Mirroring page. 2 Select the Rem ov e check box. 3 Click Apply Changes . The selected port mirroring session is deleted, an[...]

Dell PowerConnect 28xx Systems User Guide 113 Figure 7-15. Dynamic Address T able • Address Aging (10-630) — Specifies the amount of time the MAC Address r emains in the Dynamic Address T able before it is timed out if no traffic from the source is detected. The default valu e is 300 seconds. • Interface — Specifies the interface for which [...]

114 Dell PowerConnect 28xx Systems User Guide Querying the Dynamic Address T able 1 Open the Dynamic Address T able . 2 Define the parameter by which to query the Dynamic Address T able . Entries can be queried b y Po r t , MAC Address , or VLAN ID . 3 Click Query . The Dynamic Address T able is queried. Sorting the Dynamic Address T able 1 Open th[...]

Dell PowerConnect 28xx Systems User Guide 115 Figure 7-16. STP Global Settings • Spanning T ree State — Enables or disab les Spanning T ree on th e device. The possible field values are: – Enable — Enables Spanning T ree – Disable — Disables Spannin g T ree • STP Operation Mode — The STP mode by which STP is enabled on the device. T[...]

116 Dell PowerConnect 28xx Systems User Guide • P riority (0-61440 in steps of 4096) — Specifies the bridge priority va lue. When switches or bridges are running STP , each is assigned a priority . After ex ch anging BPDUs, the switch with the lowest priority value becomes the Root Bridge. The default value is 32768. The bridge priority value i[...]

Dell PowerConnect 28xx Systems User Guide 117 Defining STP Port Settings The STP P ort Settings page contains fields for assigning ST P properties to indivi dual ports. T o open the STP P ort Settings page, click Switch  Sp anning T ree  P ort Settings in the tree view . Figure 7-17. STP Port Settings • Select a P ort — P ort on which STP[...]

118 Dell PowerConnect 28xx Systems User Guide • Po r t S t a t e — The current port STP state. If enabled, the port state determines what forwarding action is taken on traffic. P ossible port states are: – Disabled — The port link is currently down. – Blocking — The port is currently blocked and cannot be used to forward traffic or lear[...]

Dell PowerConnect 28xx Systems User Guide 119 • Pr i o r i t y — The priority value of the port. The priority value influences the port ch oice when a bridge has two ports connected in a loop. The prio rity value is between 0-240. The priori ty value is provided in increments of 16. • Designated Bridge ID — The bridge priority and the MAC A[...]

120 Dell PowerConnect 28xx Systems User Guide Defining STP LAG Settings The STP LAG Settings page contains fields for assigning STP aggregating po rt parameters. T o open the STP LAG Settings page, click Switch  Spanning T ree  LAG Settings in the tr ee view . Figure 7-18. STP LAG Settings • Select a LAG — The user -defined LAG. F or more[...]

Dell PowerConnect 28xx Systems User Guide 121 • LAG State — Current STP state of a LAG. If enabled, the LAG state determines what forwarding action is taken on traffic. If the bridge discover s a malfunctioning LAG, th e LAG is placed in the Broken state. P ossible LAG states are: – Disabled — The LAG link is currently down. – Blocking ?[...]

122 Dell PowerConnect 28xx Systems User Guide Modifying the LAG STP Parameters 1 Open the STP LAG Settings page. 2 Select a LAG from the Select a LAG drop-down menu. 3 Modify the fields as desired. 4 Click Apply Changes . The STP LAG parameters are modifi ed, and the device is updated. Configuring Rapid Spa nning T ree While Classic Spanning T ree [...]

Dell PowerConnect 28xx Systems User Guide 123 Figure 7-19. Rapid Spanning T ree (RSTP) • Interface — P ort or LAG on which Rapid STP is enabled. • Rol e — The port role assigned by the STP algorithm in or der to provide to STP paths. The possible field values are: – Roo t — P rovides the lowest cost path to forward pack ets to root devi[...]

124 Dell PowerConnect 28xx Systems User Guide 3 Click Apply Changes . Rapid STP is en abled, and the device is updated. Configuring VLANs VLANs are logical subgroups of a L o cal Area Network (LAN) cr eated via software rather th an defining a hardwar e solution. VLANs combine user stations and ne twork devices into a single do ma in re g ard le s [...]

Dell PowerConnect 28xx Systems User Guide 125 Figure 7-20. VLAN Membership • Show VLAN — Lists and displays specific VLAN inform ation according to VLAN ID or VLAN name. • VLAN Name — The user -defined VLAN name. • Unauthorized Users — Enables or disables u nauthoriz ed users from access ing a VLAN. • Rem ov e VL AN — When selected,[...]

126 Dell PowerConnect 28xx Systems User Guide Figure 7-21. Create New VLAN 3 Enter the VLAN ID and name. 4 Click Apply Changes . The new VLAN is added, and the device is updated. Modifying VLAN Membership Groups 1 Open the VLAN Membership page. 2 Select a VLAN from the Show VLAN drop-down menu. 3 Modify the fields as desired. 4 Click Apply Changes [...]

Dell PowerConnect 28xx Systems User Guide 127 The VLAN P ort Membership T able displays the ports and the ports st ates, as well as L AGs. P ort s which are LAG members ar e not displayed in the VLA N P ort Membership T ab le . Assigning Ports to a VLAN Group 1 Open the VLAN Membership page. 2 Click the VLAN ID or VLAN Name option button and select[...]

128 Dell PowerConnect 28xx Systems User Guide Defining VLAN Ports Settings The VLAN P ort Settings page contains fields for ma naging ports that ar e part of a VLAN. The port default VLAN ID (PVID) is configur ed on the VLAN P ort Settings page. All untagged packets arriving to the device are tagged by the ports PVID. T o open the VLAN P ort Settin[...]

Dell PowerConnect 28xx Systems User Guide 129 The VLAN port settings are defined, and the device is updated. Displaying the VLAN Port T able 1 Open the VLAN P ort Settings page. 2 Click Show All. The VLAN P ort T able opens. Figure 7-23. VLAN Port T able Defining VLAN LAG Settings The VLAN LAG Setting page provides param eters for managing LAGs tha[...]

130 Dell PowerConnect 28xx Systems User Guide Figure 7-24. VLAN LAG Setti ng • LAG — The LAG number included in the VLAN. • PVID — Assigns a VLAN ID to untagged pack ets. The possible field va lues are 1-4095. VLAN 4095 is defined as per standard and industry practice, as th e Discard VLAN. P ackets classified to this VLAN are dropped. • [...]

Dell PowerConnect 28xx Systems User Guide 131 Aggregating Ports P ort Aggr egation optimizes port usage by linking a grou p of ports to gether to fo rm a single Link Aggr egated Group (LAG). P ort Agg regation multiplies the bandwidth between the devices, increases port flexibility , and provides link redundancy . The device supports up to eigh t L[...]

132 Dell PowerConnect 28xx Systems User Guide Defining LAG Membership The LAG Membership page contains fields for assig ning ports to LAGs. LAGs can include up to eight ports. When a port is added to a LAG, the por t acquires the LAG’s properties. If the port cannot be configured with the LAG properties , a trap is generated and the port op erate[...]

Dell PowerConnect 28xx Systems User Guide 133 Defining Multicast Global Parameters Layer 2 switching forwards Mu lticast packets to all relevant VLAN ports by default, treating the pack et as a Multicast transmissi on. While this is functional, in the sense that all relevant ports/nodes r eceive a copy of the frame, it is potentially wasteful as po[...]

134 Dell PowerConnect 28xx Systems User Guide Enabling IGMP Snooping on the Device 1 Open the Multicast Global P arameters page. 2 Select Enable in the IGMP Snooping Status field. 3 Click Apply Changes . IGMP Snooping is enabled on the device. Adding Bridge Multicast Address Members The Bridge Multicast Group page displays the ports and LAGs attach[...]

Dell PowerConnect 28xx Systems User Guide 135 The following table contains the IGMP port and LAG members management settings: Adding Bridge Multicast Addre sses 1 Open the Bridge Multicast Group page. 2 Click Add . The Add Bridge Multicast Group page opens: Figure 7-28. Add Bridge Multicast Group 3 Define the VLAN ID and New Bridge Multic ast Addre[...]

136 Dell PowerConnect 28xx Systems User Guide 6 Click Apply Changes . The bridge Multicast address is assigned to the Multicast grou p , and the device is updated . Defining Ports to Receive Multicast Service 1 Open the Bridge Multicast Group page. 2 Define the VLAN ID and the Bridge Mu lticast Address fields. 3 T oggle a port to S to join the port[...]

Dell PowerConnect 28xx Systems User Guide 137 Figure 7-29. Bridge Multicast Forward All • VLAN ID — Identifies a VLAN. • Po r t s — P orts that can be added to a Multicast service. • LAGs — LAGs that can be added to a Multicast service. The contains the settings for ma naging router an d port sett ings. Port Control Definition F The por[...]

138 Dell PowerConnect 28xx Systems User Guide Attaching a Port to a Multicast Router or Switch 1 Open Bridge Multicast F orward All page. 2 Define the VLAN ID field . 3 Select a port in the Po r t s table, and assign the port a value. 4 Click Apply Changes . The port is attached to the Multicast router or switch. Attaching a LAG to a Multicast Rout[...]

Dell PowerConnect 28xx Systems User Guide 139 IGMP Snooping The IGMP Snooping page contains fields for adding IGMP me mbers. T o open the IGMP Snooping page, click Switch  Multicast Support  IGM P Snooping in the tree view . Figure 7-30. IGMP Snooping • VLAN ID — Specifies the VLAN ID. • IGMP Snooping Status — Enables or disables IGMP[...]

140 Dell PowerConnect 28xx Systems User Guide Enabling IGMP Snooping on the Device 1 Open the IGMP Snooping page. 2 Select the VLAN ID for the d evice on which IGMP snooping needs to be enabl ed. 3 Select Enable in the IGMP Snooping Status field. 4 Complete the fields on the page. 5 Click Apply Changes . IGMP snooping is enabled on the device. Disp[...]

Dell PowerConnect 28xx Systems User Guide 141 8 V iewing Statistics The Statistic pages contain links to device i nformation for R MON, and CPU utilization. V iewing RMON Statistics Remote Monitoring (RMON) cont ains links for viewing networ k information from a remote location. T o ope n the RMON page, click Sta tistics/RMON  RMON in the tree v[...]

142 Dell PowerConnect 28xx Systems User Guide • Received Bytes (Octets) — Number of octets received on the interface since the device was last refr eshed. Thi s number includes bad packet s and FCS octets, but ex cludes framing bits. • Received P ackets — Number of packets received on the in terface, including bad packets, Multicast and bro[...]

Dell PowerConnect 28xx Systems User Guide 143 Figure 8-2. CPU Utilization The CPU Utilizatio n page contains the fo llowing informatio n: • Refresh Rate — Amount of time that passes before the statisticsare r efreshed.[...]

Dell PowerConnect 28xx Systems User Guide 144 9 Configuring Quality of Service This section provides information for defining an d configuring Quality of Service (QoS) parameters. To o p e n t h e Quality of Ser vice page, click Quality of Service in the tree view . An implementation example that requires QoS includ es certain types of traffi c suc[...]

Dell PowerConnect 28xx Systems User Guide 145 DSCP values can be mapped to priority queu es. Th e following table contains the default DSCP mapping to forwarding queue values: DSCP mapping is e nabled on a per -system basis. CoS Services After packets are assigned to a specific queue, CoS services can be assigned to the q ueue(s). Output queues are[...]

146 Dell PowerConnect 28xx Systems User Guide Defining CoS Global Parameters This section contains the following topics: • Defining CoS Settings • Defining QoS Interface Settings • Defining Queue Settings • Mapping CoS V alues to Que ues • Mapping DSCP V alues to Queues Defining CoS Settings Defining CoS Se ttings Class of Service (CoS) g[...]

Dell PowerConnect 28xx Systems User Guide 147 1 Open the CoS Settings page . 2 Select Enable in the CoS Mode field. 3 Click Appl y Changes. Class of Service is enabled on the device. Selecting T rust: 1 Open the CoS Settings page . 2 Select Tr u s t in the Tr u s t M o d e field. 3 Click Appl y Changes. Tr u s t i s s e l e c t e d . Defining QoS I[...]

148 Dell PowerConnect 28xx Systems User Guide Assigning QoS/CoS settings for an interface: 1 Open the Interface Settings page. 2 Select an interface in the Interface field. 3 Define the fields. 4 Click Apply Changes . The CoS settings are assigned to the interface. Displaying the QoS Interface Settings T able: 1 Open the Interface Settings page. 2 [...]

Dell PowerConnect 28xx Systems User Guide 149 • Queues — The Queue number . • Strict P riority — Specifies if traffic sche duling is based strictl y on the queue priority . • WRR — Specifies if traffic s cheduling is base d on the W ei ghted Round Robin (WRR) weights to egress queues. The default values ar e: – 1 for Q ueue 1 – 2 fo[...]

150 Dell PowerConnect 28xx Systems User Guide Mapping CoS V alues to Queues The CoS to Queue Mapping T able page contains fields for classifyin g CoS settings to traffic queues. T o open the CoS to Queue Mapping T able page, click Quality of Service  CoS Global P arameters  CoS to Queue in the tree view . Figure 9-5. CoS to Queue Mapping T[...]

Dell PowerConnect 28xx Systems User Guide 151 Mapping DSCP V a lues to Queues The DSCP to Queue page provides fields for defining output qu eue to specific DSCP fi elds. F o r the list of the DSCP default queue settings, see "DSCP to Queue Mapping T able Default V alues" on page 145. T o open the DSCP to Queue page, click Quality of Ser v[...]

152 Dell PowerConnect 28xx Systems User Guide 1 Open the DSCP to Queue page. 2 Check the Res to r e D ef a ul ts checkbox. 3 Click Apply Changes . The default values are r estored.[...]

Dell PowerConnect 28xx Systems User Guide 153 A Managing the Device Using the CLI A limited number of CLI commands ar e available for managing the device. These commands are a subset of the options avai labl e via the web interface. Accessing the Devi ce Through the CLI The device can be managed over a direct connection to the console po rt or via [...]

154 Dell PowerConnect 28xx Systems User Guide 2 In the Run window , type Telnet <IP address > in the Open field. 3 Click OK to begin the T elnet session. Using the CLI This section provides in formation for using the CLI. Command Mode Overvi ew The CLI is divided into command mo des. Each command mode has a sp ecific command set. Entering a q[...]

Dell PowerConnect 28xx Systems User Guide 155 Privileged EXEC Mode P rivileged access can be protec ted to prevent unauthorized access an d ensure operating para meters. P asswords are displayed in the ***** format on the screen, and ar e case sensitive. T o access a nd list the Privileged EXEC Mode co mmands: 1 At the prompt type enable and press [...]

156 Dell PowerConnect 28xx Systems User Guide The following example illustrates how to access Global Co nfiguration Mode and return back to the P rivileged EXEC Mode: console# console#configure console(config)#exit console# Interface Configuration Mode Interface configuration commands modify specific IP interface se ttings, including bridge-group, [...]

Dell PowerConnect 28xx Systems User Guide 157 CLI Commands Command: copy T o copy any file from a source to a destination, use the copy P rivileged EX EC command. copy source-url destination-url Syntax Description • source-url — The location URL or reserved keyword of the source file to be copied. • destination-url — The destination URL or [...]

158 Dell PowerConnect 28xx Systems User Guide Understanding Invalid Combinations of Source and Destination Some invalid combinations of source and de stination exist. Specifically , you cannot copy the following: • If the source file and de stination file are the same file. • xmodem: can't be destination. Can be copied to image , boot and [...]

Dell PowerConnect 28xx Systems User Guide 159 Command modes All configuration modes Command: end T o end the current configuration session and return to privileged EXEC mode, us e the end global configuration command. end Syntax Description This command has no ar guments or k ey words Command Mode All configuration modes Default value This command [...]

160 Dell PowerConnect 28xx Systems User Guide Console# Command: exit (EXEC) T o close an active term inal sessio n by logging off the router , use the exit command in EXEC mode. exit Syntax Description This command has no ar guments or k ey words Command Mode EXEC Default value This command has no default setting. Example Console> exit Command: [...]

Dell PowerConnect 28xx Systems User Guide 161 Parameters range • interface — V alid Ethernet port. Command Modes Global Configuratio n Example Console(config)# interface ethernet g1 Console(config-if)# Command: interfac e port-channel T o configure a p ort-channel type and ente r port-channel configuration mode, use the interface port- channel [...]

162 Dell PowerConnect 28xx Systems User Guide Syntax Description • vlan-id — VLAN ID Parameters range • vlan-id — V alid VLAN Command Modes Global Configuratio n Usage Guidelines In case the VLAN doesn't exist ("ghost VLAN") only partial list of the commands would be available under the interface VLAN conte xt. The commands t[...]

Dell PowerConnect 28xx Systems User Guide 163 • prefix-length —Range: 8-30 • default-gateway ip-address —V alid IP address Defaults No IP address is defined f or interfaces Command Modes Interface Configuration VLAN mode. User Guidelines • Assigning an IP address to an interface does not disable L2 protocols, such as STP . • Defining a [...]

164 Dell PowerConnect 28xx Systems User Guide • packet_count — 0 - 65535 • time_out — 50 - 65535 Command Mode EXEC Default value This command has no default setting. Usage Guidelines P ress Esc to stop pinging. F ollowing are sample results of the pi ng command: Destination does not r espond-If the host does not r espond, a " no answer[...]

Dell PowerConnect 28xx Systems User Guide 165 64 bytes from 10.1.1.1: icmp_seq=1. time=8 ms 64 bytes from 10.1.1.1: icmp_seq=2. time=8 ms 64 bytes from 10.1.1.1: icmp_seq=3. time=7 ms ----10.1.1.1 PING Statistics---- 4 packets transmitted, 4 packets received, 0% packet loss round-trip (ms) min/avg/max = 7/8/11 Command: show tech-supp ort command T [...]

166 Dell PowerConnect 28xx Systems User Guide show system mode show ip inte rface show interfaces configuration show interfaces status show interfaces port-cha nnel show vlan show interfac es switchport show spanning tree show bridge multicast address-table show ip igmp snoopi ng groups show dot1x show dot1x users show interfaces counters show user[...]

Dell PowerConnect 28xx Systems User Guide 167 • rw — Specifies read-write access • su — Specifies SNMP administrator access • ipv4-address — Management station IPv4 address. Default is all IP addresses. Parameters range • community — 1 - 20 chars • ip-address — V alid IP address Default No community is defined Command Mode Globa[...]

168 Dell PowerConnect 28xx Systems User Guide Default No user is defined. Command modes Global Configuratio n Example Console (config)# username bob password lee privilege 15[...]

169 Glossary This glossary contains key technical words of interest. A Access Mode Specifies the method by which user access is granted to the system. Access P rofiles Allows network managers to define profiles and rules for accessing the device. Access to management functions can be limited to user groups, which are defined by the following criter[...]

170 Baud The number of signaling ele ments transmitted each second. Best Effort T raffic is assigned to the lowest priority queue, and packet delivery is not guaranteed. Boot V ersion The boot version. BootP Bootstrap Protocol. Enables a workstation to discover its IP address, an IP address of a BootP server on a ne twork, or a configuration file l[...]

171 CLI Command Line Interface . A set of line commands used to config ure the system. Communities Specifies a group of users which r etain s the same system access rights. CPU Central P rocessing Unit . The part of a computer that processes information . CPUs ar e compo sed of a control unit and an AL U. D DHCP Client An Internet host us ing DHCP [...]

172 FIFO F irst In F irst Out. A queuing process where the first packet in the queue is the first pack et out of the packet. Flapping Flapping occurs when an interfaces state is constantly changing. F o r example, an STP port constantly changes from listening to learning to forwarding. This ma y cause traffic loss. Flow Control Enables lower speed [...]

173 IEEE 802.1p P rioritizes network traffic at the data-link/MAC sublayer . IEEE 802.1Q Defines the operat ion of VLAN Bridges that permit the definition, operation, and administration of VLANs with in Bridged LA N infrastructures. Image F ile The system imag e is saved in a Flash s ector called image. Ingress P ort P orts on which network traffic[...]

174 MAC Address Learning MAC Addr ess Learning chara cterizes a learning bridge, in which the packet’s source MAC address is recor ded. P ackets destined for that a ddress are forwarded only to the bridge interface on which that address is loc ated. P ack ets addressed to unknown addresses are forw ar ded to every bridge interface. MAC Addr ess L[...]

175 PDU P rotocol Data Uni t. A data unit specified in a layer protocol consisting of pr otocol control information and layer user data. PING P acket Internet Groper . V erifies if a specific IP address is available. A pack et is sent to another IP address and waits for a r eply . Po r t Physical ports provide connecting components that allow micro[...]

176 R unning Configuration F ile Contains all Star tup file commands, as well as all commands entered during the curr ent session. After the device is powered down or r ebooted, all commands stored in the R unning Configuration file are lost. S Segmentation Divides LANs int o separate L AN segments for bridging and routing. Segm entation eliminates[...]

177 Te l n e t T eletype Network P rotocol. A network protocol used on the Internet or local ar ea networks to provide bidirectional inter active communications. Enables system users to log in and use resources on re mo te networks. TFTP T rivia l F ile T ransfer Protocol . Uses User Data P rotocol (UDP) without security features to transfer files.[...]

178[...]

179 Index Numerics 802.1d, 15 A Access mode, 75 Address Resolution Protocol, 169 Aggregat ed link, 131 AH, 169 ARP , 169 Asset, 58 Auto-Negotiation, 37 B Boot V ersion, 17 0 BootP , 170 BPDU, 170 Bridge Protocol Data Unit, 170 Buttons, 56 C Cables, 64-65 CIDR, 170 Command Mode Overview , 154 Community table, 75 CoS, 147 D Defining device informatio[...]

180 IEEE 802.1Q, 173 IGMP , 173 Image File, 79, 173 Ingress, 173 Interface mode, 156 Internetwork Packet Exchange, 173 IP , 1 73 IPM, 173 IPX, 173 ISIS, 173 J Jumbo frames, 173 L L2TP , 173 LAG , 104, 173 LAGs, 136 Local User Database, 68 Loops, 1 14 M MAC Address, 173-174 MAC address, 1 12 Management Information Base., 174 Management security , 68[...]

181 T TFTP , 177 T ime Domain Reflectometry , 64 T ree view , 54 T rivial File T ransfer Protocol, 177 T runk Configuration Page, 104 Tr u s t , 1 4 7 U UDP , 177 Understanding the interface, 54 Uploading file s, 81 User Data Protocol, 177 V V irtual Local Are a Networks, 177 VLAN, 124, 128, 136, 17 7 VLAN ID, 113 VLAN membership, 124 VLAN Port Mem[...]

182[...]

Dell PowerConnect 28xx Systems User Guide 183 A Internal Revision History for Onl ine Help and Us er Guide Rev Date Updated by Description of Change A04 27-Feb-12 Y osi Katan • Updated the Conf ig section to di stinguis h between PC2808 de vices and PC28 16/24/48 de vices when pe rforming a transition to managed mode from un manned or secured mod[...]

184 Dell PowerConnect 28xx Systems User Guide[...]