Dell 28xx manuale d’uso

www .dell.com | support.dell.com Dell™ PowerConnect™ 28xx Sy stems 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 ho w to avoid the problem. CAUTION: A CAUTION indicates a potential for pro perty damage, personal injury , or death. ____________[...]

Contents 3 Contents 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Sy stem Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 PowerConnect 2808 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 PowerConnect 2816 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9[...]

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

Contents 5 Startup Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Startup Menu Procedures . . . . . . . . . . . . . . . . . . . . . . . . . 45 Software Download . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 Erase FLASH File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 Erasing the Device [...]

6 Contents Configuring RADIUS Global Parameters . . . . . . . . . . . . . . . . . . 71 Defining SNMP Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 Defining SNMP Global Parameters . . . . . . . . . . . . . . . . . . . . . 75 Defining Communities . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 Defining SNMP Notificati[...]

Contents 7 Configuring Rapid Spanning T ree . . . . . . . . . . . . . . . . . . . . . 124 Configuring VLANs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126 Defining VLAN Members . . . . . . . . . . . . . . . . . . . . . . . . . 126 VLAN Port Membership T able . . . . . . . . . . . . . . . . . . . . . . 128 Defining VLAN Ports Sett[...]

8 Contents Using the CLI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158 Command Mode Overview . . . . . . . . . . . . . . . . . . . . . . . . 158 User EXEC Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158 Privileged EXEC Mode . . . . . . . . . . . . . . . . . . . . . . . . . . 159 Global Configuration Mode[...]

Dell PowerConnect 28xx Sy stems User Guide 9 1 Introduction This User ’s Guide contains the information needed for installi ng , configuring and maintai ning 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 wo[...]

10 Dell PowerConnect 28xx Sy stems 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 fo[...]

Dell PowerConnect 28xx Sy stems 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 operate[...]

12 Dell PowerConnect 28xx Sy stems User Guide Auto Negotiation Aut o negotiation allows 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 Sy stems 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 cke[...]

14 Dell PowerConnect 28xx Sy stems User Guide • Short-Reach — Reduction of power over Ethernet cab les shorter than 40m. IGMP Snooping Internet Group Membership P rotocol (IGMP) Snooping examines IGMP frame conten ts, when they are forwarded by the device fr om work st ations to an upstream Multicast router . F rom the frame, the device identif[...]

Dell PowerConnect 28xx Sy stems 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-duplex operation. DHCP Server Dynamic Host Configuration P rotocol is a method of managing network parameter assignment from a single D[...]

16 Dell PowerConnect 28xx Sy stems User Guide Class of Service (CoS) Featu res 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 suppo[...]

Dell PowerConnect 28xx Sy stems User Guide 17 2 Hardware Description Switch Port Configurations PowerConnect 28x x Front and Back Panel Port Descriptio n 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 ports can operate at 10, 1 00 or 1000 Mbps. These por[...]

18 Dell PowerConnect 28xx Sy stems 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 [...]

Dell PowerConnect 28xx Sy stems 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 connecti[...]

20 Dell PowerConnect 28xx Sy stems 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, design[...]

Dell PowerConnect 28xx Sy stems 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 th e 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 [...]

22 Dell PowerConnect 28xx Sy stems 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 mo nitori ng the switch node as well as indicating diagnostic test results. [...]

Dell PowerConnect 28xx Sy stems 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 PowerConnect 28xx has a Mode push button on the front pan el. The M ode but ton is for [...]

24 Dell PowerConnect 28xx Sy stems 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 hrough standard RJ-45 c[...]

Dell PowerConnect 28xx Sy stems 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 ti[...]

26 Dell PowerConnect 28xx Sy stems 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 Sy stems 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 Sy stem Information Gui[...]

28 Dell PowerConnect 28xx Sy stems 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 site req u ire m en ts : • Po w e r — The device is installed within 1[...]

Dell PowerConnect 28xx Sy stems 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 Infor[...]

30 Dell PowerConnect 28xx Sy stems 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 [...]

Dell PowerConnect 28xx Sy stems 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 be capable of supporting the device. • Allow at least 2 inches (5.1 cm) space on the si des for proper ventilation and 5 inch es (12.7 cm) at the[...]

32 Dell PowerConnect 28xx Sy stems User Guide 6 On the wall mark the locations where the scre ws to hold the device must be pr e pared. 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 [...]

Dell PowerConnect 28xx Sy stems User Guide 33 NOTE: Do not plug a phone jack connector into an RJ-45 po rt. This will damage the Ethe rnet device. Use only twisted-pair cables with RJ-45 connecto rs that conform to FCC standards. NOTE: If auto negotiation is turned off on the ports, a straight through cable must be used. T o connect the device to t[...]

34 Dell PowerConnect 28xx Sy stems User Guide 3 Connect the female connector of the RS-232 crossover cable directly to the device Co nsole port on the device, and tighten the captive retaining screws. The Console port is located on the back panel. Connecting to Console Port Connecting a Device to a Power Supply 1 Connect the supplied standard AC po[...]

Dell PowerConnect 28xx Sy stems User Guide 35 Port Connections, Cables, and Pinout Information This section e xplains th e device’s physical interfaces, and provides information ab out port connections. Connector types, ports and cables ar e summarized in P orts, Connector s, and Cables. Copper Cable and Optical T ransceiver Diagnostics are suppo[...]

36 Dell PowerConnect 28xx Sy stems User Guide 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-negotiati on enabl es aut omatic detection of speed, duplex mode and flow control on swit[...]

Dell PowerConnect 28xx Sy stems User Guide 37 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 re[...]

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Dell PowerConnect 28xx Sy stems User Guide 39 4 Starting and Configuring the Device After completing all e xternal co nnections, procede a s follows: • If the device is to be used as an unmanaged sw itch, there is no need for a terminal connection. • A terminal connection is required if the device is to be used in a managed mode. NOTE: The Powe[...]

40 Dell PowerConnect 28xx Sy stems User Guide Figure 4-1. Installation and Configuration Flow Booting the Device - Managed Mode The procedure described in t his section refers to th e device when set to operate as a manage d switch. The PowerConnect 2808/16/24/48 models include a built-in d ual purpose Mode Button. T o change between managed and un[...]

Dell PowerConnect 28xx Sy stems User Guide 41 3 Deactivate the AC power r eceptacle. 4 Connect the device to the A C receptacle. 5 Activate the AC power receptacle. When the power is turned on with the local terminal already connect ed, the device goes through P ower On Self T est (POST). POST runs every time the device is initialized and checks ha[...]

42 Dell PowerConnect 28xx Sy stems User Guide • SNMP Community String and SNMP Management Sys tem IP address (optional) • Username and P assword • Device IP address • IP subnet mask • Default Gateway IP addr ess The Setup W izard displays the following information: Welcome to Dell Easy Setup Wizard. The Setup Wizard guides you through the[...]

Dell PowerConnect 28xx Sy stems User Guide 43 To setup the SNMP management account you must specify the manag ement system IP address and the "community string" or password that the particular management system uses to access the switch. The wizard automatically assigns the highest access level [Privilege Level 15] to this account. You ca[...]

44 Dell PowerConnect 28xx Sy stems 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 th[...]

Dell PowerConnect 28xx Sy stems User Guide 45 Retrieving an IP Address From a DHCP Server When using the DHCP pr otocol to retrieve an IP addr ess , the device acts as a DHCP client. When the device is reset, the DHCP command is saved in th e configuration file, but not the IP address. T o configure the device so it will retrieve an IP addr ess fro[...]

46 Dell PowerConnect 28xx Sy stems User Guide Processor: FireFox 88E6218 ARM946E-S , 64 MByte SDRAM. I-Cache 8 KB. D-Cache 8 KB. Cache Enabled. Autoboot in 2 seconds - press RETURN or Esc. to abort and enter prom. Preparing to decompress... 2 When the auto-boot message appears, press <Ent er> to get the Startup menu. The Startup menu procedur[...]

Dell PowerConnect 28xx Sy stems User Guide 47 Erasing the Device Configuration 1 F rom the Startup menu, press [2] within two seconds to er ase flash file. The following message is displayed: Warning! About to erase a Flash file. Are you sure (Y/N)? y 2 Pre s s Y . The following me ssage is displ ayed. Write Flash file name (Up to 8 characters, Ent[...]

48 Dell PowerConnect 28xx Sy stems User Guide 3 Enter copy tftp://{ tftp add ress}/{f ile name} image to copy a new system image to the device. When the new image is downloaded, it is saved in the ar ea allocated for the other copy of system image. The follow ing is an example of the inform ation that appea rs: console# copy tftp://176.215.31.3/fil[...]

Dell PowerConnect 28xx Sy stems User Guide 49 session. Do you want to continue (y/n) [n]? 5 Enter y . The device reboots. Management Modes The device supports the following modes: • Managed Mode — P rovides switch management through the web interface. F rom Managed mode, you can move to Unmanaged mode by pressing the Mode button on the device, [...]

50 Dell PowerConnect 28xx Sy stems User Guide T ransitioning Between Modes The following diagram summari zes movement between modes: Figure 4-2. T ransitioning Between Management Modes[...]

Dell PowerConnect 28xx Sy stems User Guide 51 Returning to M anaged Mode When returning to Managed mode from either Unmanaged or Secure mode, the Restor e Saved Configuration page appears. This page can be used to r etrieve a saved configuration. Y ou can also change the device IP addres s using this page. Figure 4-3. Restore Saved Configuration ?[...]

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Dell PowerConnect 28xx Sy stems User Guide 53 5 Using Dell OpenManage Switch Administrator This section provid es 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 xpandable view of the features an[...]

54 Dell PowerConnect 28xx Sy stems User Guide Device Represen tation The P owerConnect home page contains a graphical device repr esen tation of the front panel. Figure 5-2. Port LED Indicators T able 5-1. Interface Components Component Name 1 The tree view contains a li st of the differen t device featur es. The branches in the tree view can be e [...]

Dell PowerConnect 28xx Sy stems User Guide 55 The port coloring indicates if a specific port is curr ently active. P orts can be the following colors: T able 5-2. Led Indicators NOTE: The Port LEDs are not reflected in PowerConnect front panel in the PowerConnect OpenManage Switch Administrator . LED status can only be determined by view ing the ac[...]

56 Dell PowerConnect 28xx Sy stems User Guide Device Manageme nt Buttons Device Management buttons provide an easy method of configuring devi ce information, 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 informati[...]

Dell PowerConnect 28xx Sy stems 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 [...]

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Update with your book title 59 6 Configuring Sy stem 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 pa ge, click System in the tree view . Figure 6-1. Sy stem Defining General Device Information The General page[...]

60 Update with your book title Figure 6-2. Asset • System Name (0-159 Characters) — Defines the user -defined device name. • System Contact (0-159 Characters) — Specifies the name of the contact person. • System Location (0-159 Characters) — Specifies the location where th e system is currently running. • MAC Address — Specifies the[...]

Update with your book title 61 Defining Sy stem Information: 1 Open the Asset page. 2 Define the relevant fields. 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 elne t session is initiated. Viewing the V ersions Page The Ve r s i o n[...]

62 Update with your book title Resetting the Device The Res et page enables the device to be r eset from a re mote location. F o r more inf ormation about saved Configuration file s, see "Man aging F iles" on page 80 . 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 Resetting the D[...]

Update with your book title 63 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 em oving the IP address of the switch so that it becomes inaccessible. In Secure Mode the switch retain[...]

64 Update with your book title Defining Device IP Addresses The IP Addressing page contains links fo r assigning interface and default gate way IP addresses, and enabling or disabling DHCP . T o open the IP Addressing page, click System → IP Addressing in the tree view . Defining IP Interface Parameters The IP Interface P arameters p a g e i s u [...]

Update with your book title 65 • DHCP Default Gateway — Defines the Default Gateway Address received from the DHCP server . • Apply DHCP Address — Activates the IP Address, Subnet Mask Addr ess, and Default Gatew ay Address, r eceived from the DHCP server . Enabling DHCP: 1 Open the IP Interface P arameters page . 2 Set DHCP to Enable . 3 C[...]

66 Update with your book title Figure 6-7. Integrated Cable T est for Copper Cables • Po r t — The port to which the cable is connected. • T est Result — The cable test results. P ossible values are: – No Cable — There is no cable connected to the port. – Open Cable — The cable is connected on only one side. – Short Cable — The [...]

Update with your book title 67 Displaying Virtual Cable T est Results T able 1 Open the Integrated Cable T est for Copper Cables page. 2 Click Show All . The V i rtual Cable T est Results T able opens. Viewing Optical T ran sceiver Diagnostics The Optical T ransceiver Diagnostics page contains fields for performing tests on F iber Optic cables. Opt[...]

68 Update with your book title • Loss of Signal — Indicates if a signal loss occu rred in the cable. • Data Ready — The transceiver has achieved power up and data is ready . Displaying Optical T ransceiver Diagnostics T est Results T able 1 Open the Optical T ransceiver Diagnostics page. 2 Click Show All . The test is run and the V irtual C[...]

Update with your book title 69 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 Management S ecurity page , click System → Management Security in the tree view . Defining the Local User Datab[...]

70 Update with your book title 4 Click Apply Changes . The user access rights and passwords are defined, and the device 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 device is upda[...]

Update with your book title 71 2 Click Show All. The Loc al Us er T ab le 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 Glo bal Parameters Remote Authorization Dial-In User Serv ice (RADIUS) servers provi de additio nal securi ty for n[...]

72 Update with your book title • P riority (0-65535) — Specifies the server priority . The poss ible values are 0-65535, where 0 is the highest value. This is used to configur e the order in which servers are queried. • Authenti cation P ort — Identifies the authentication port. The authentication port is used to verify the RADIUS server au[...]

Update with your book title 73 2 Click Add . The Add RADIUS Server page opens: 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 Li st: 1 Open the R ADIUS Settings page. 2 Click Show All . The Show all RADIUS Servers page opens: F[...]

74 Update with your book title 2 Click Show All . The R ADIUS Servers List page opens. 3 Modify the relevant fields . 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 op[...]

Update with your book title 75 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 → SNMP → Global P arameters in the tree view . Figure 6-15. Global Parameters • SNMP Notifications — Enables or di sables the devi[...]

76 Update with your book title 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 Station — A li[...]

Update with your book title 77 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, and the de v[...]

78 Update with your book title 4 Select the Rem ov e check box. 5 Click Apply Changes . The selected community entry is de leted, and the device is updated. Defining SNMP Notification Recipients The Notification R ecipients page contains informatio n for defining filters that determine whether traps are sent to specific users, and the t rap type se[...]

Update with your book title 79 – SNMPv2 — SNMP V e rsion 2 traps are sent. • Remove No tification Recipient — When checked, r emoves selected notification recipients. Adding a new T rap Recipients 1 Open Notification R ecipients page. 2 Click Add . The Add Notification Recipients page opens: 3 Define the relevant fields. 4 Click Apply Chang[...]

80 Update with your book title 2 Click Show All . The Notification Recipients T ables page opens. 3 Select a notification re cipie nt. 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 page contains fields for managing de vice software, the Image F iles, [...]

Update with your book title 81 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 is selected, [...]

82 Update with your book title • Source F ile Name (1-64 Characters) — Indicates the configuratio n files to b e downloaded. During the imag e file download, a dialog box opens which displays the download progress. Downloading Files 1 Open the F ile Download F rom Ser ver page. 2 Define the fields. 3 Click Apply Changes . The software is downlo[...]

Update with your book title 83 Uploading Files 1 Open the F ile Upload to Server page. 2 Define the fields. 3 Click Apply Changes . The software is uploaded to the device. Restoring Default Settings The Res t o re De f au l t s page allows you to restor e the device settings to thei r factory default values. T o open the R e store Defaults page, cl[...]

84 Update with your book title The DHCP server uses a defined pool of IP addresses (user -defined) fro m which it allocates IP addresses to DHCP clients. The DHCP server can allocate IP addresses in three configuration modes: • Static allocation — The network administrator maps the hardwa re address of a host to an IP address on the DHCP server[...]

Update with your book title 85 • DHCP Ping — Indicates if the DHCP server is set to ping the o f fe re d IP a dd re ss b e fo re re sp o nd i n g t o a client request, to ensure that the addr ess is not in use. The po ss ible field values are: – Enable — Enables ping on th e DHCP server . – Disable — Disables ping on the DHCP server . T[...]

86 Update with your book title Figure 6-25. Network Pool • Subnet IP Address — Specifies the IP address of the subn et in which the network pool resides. • Network Mask — Specifies the pool’s network mask. • Pr e f i x L e n gt h — Specifies the number of bits that comprise the address prefix. • Address P ool Start — Specifies the[...]

Update with your book title 87 • Domain Name — Specifies the domain name for a DHCP cl ient. The domain name may contain up to 32 characters. • NetBIOS WI NS Ser ver — Specifies the NetBIOS WINS name server available to a DHCP client. • NetBIOS Node T ype — A parameter that informs the workstation how to resolve the NetBIOS name. V alid[...]

88 Update with your book title Figure 6-26. Excluded Addresses • Start IP Address — Displays the first IP address in the range of excluded IP addresses. • End IP Address — Displays the last IP address in the range of ex cluded IP addresses. Adding an Excluded Address 1 Open the Excluded Addresses page. 2 Click Add . The Add Excluded page op[...]

Update with your book title 89 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 → DHCP Ser ver → Static Hosts in the tree view . Figure 6-28. Static Hosts • Host Name — Indicates the host p ool name, which can be a [...]

90 Update with your book title • NetBIOS WI NS Ser ver — Specifies the NetBIOS WINS name serv er availabl e to a Microsoft DHCP static host. • NetBIOS Node T ype — Informs the workstation how to resolv e the NetBIOS name. V alid node type s are: – Blank — The workstation is not informed as to wh ich type of NetBIOS node the client is. ?[...]

Update with your book title 91 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[...]

92 Update with your book title Deleting Static Hosts 1 Open the Static Hosts page. 2 Click Show All . The Static Hosts T able page ope ns. 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. Configuring Address Binding The Address Binding page displays a list of the DHCP ser[...]

Update with your book title 93 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 System → Ad[...]

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Update with your book title 95 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 through both Access[...]

96 Update with your book title 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, f or single-session access. Only one host must be authorized[...]

Update with your book title 97 – 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 ne — P ort authentication is performed first using the RADIUS server . If the port is not authenticated, then no au thentication method is used, [...]

98 Update with your book title – Authenticated ports remain unauthenticated VLAN and Guest VLAN members. Static VLAN configuration is not applied to the port. – The following list of VLANs can not participate in DV A: an Unauthenticated VLAN, a Dynamic VLAN that was created by GVRP , a V oice VLAN, a Default VLAN and a Guest VLAN. – Network a[...]

Update with your book title 99 Figure 7-2. Port Based Authentication T able T ermination 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 Parameters in the Port [...]

100 Update with your book title 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 Hos ts . Figure 7-3. Multiple Hosts • Po r t — The port number fo[...]

Update with your book title 101 • T rap F requency (1-1 000000) (Sec) — Defines the time period by which traps are sent to the host. The T rap F requency (1-1000000 ) field can be 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 are: – Unau[...]

102 Update with your book title Authenticating Users The Authenticated Users page displays user port access lists. T o open the A uthenticated 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 port number(s) [...]

Update with your book title 103 Configuring Ports The Po r t s page contains links to port functionality pages including adva nced features, such as Green 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 defining port para m[...]

104 Update with your book title • Admin Speed — The configured rate for the port. The port type determine s what speed setting options are available. Admin speed can only be designated when auto negotiation is disabled on the configured port. • Current P ort Speed — The actual currently co nfigured port speed (bps). • Admin Duplex — The[...]

Update with your book title 105 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 Po r t C o n f i g u r a t i o n page. 2 Select a port in the Po [...]

106 Update with your book title The LAG Co nfiguration page contains fields for configurin g paramete rs for co nfigured LAGs. The device supports up to four LA Gs, each having six members. F or information about Link Aggreg ated Grou ps and assigning ports to LAGs, refer to Aggregating P orts . To o p e n t h e LAG Configuration page, click Switch[...]

Update with your book title 107 • Admin Status — Enables or disables traffic forwarding through the selecte d LAG. • Current LAG Status — Indicates if the LAG is currently operating. • Operational Status — Operational status of the LAG. • Admin Auto Negotiat ion — Enables or disables Auto Negotiatio n on the LAG. A uto-negotiation i[...]

108 Update with your book title The LAG Configuration T able 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 environmentally friendly , specifically by reducing power usage of Ethernet co nnections. The follow ing methods ar[...]

Update with your book title 109 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. • Link Down Energy Saving Mode ?[...]

110 Update with your book title The Green Ethernet P orts T able includes th e followin g port ener gy saving information: • Po r t — Indicates the port. • Energy-Detect — The status of the Energy-Detect mode on the link: – Admin — Whether the Energy-Detect ha s been enabled for the port. – Oper — Whether Energy-Detect is cu rr entl[...]

Update with your book title 111 Figure 7-12. Storm Control • Po r t — The port from which storm contr ol is enabled. • Broadcast Control — Enables or disables forw arding br oadcast packet types on the device. • Mode — Specifies the Broadcast mode cu rrently enabled on the device. The possible field value are: – Unknown Unicast, Multi[...]

112 Update with your book title Figure 7-13. Storm Control T able Defining Port Mirroring Sessions P ort mirroring monitors and mirrors network traff ic by forwarding co pies of incoming and outg oing packets from one port or a number of ports (source port or ports) to a monito ring (destination) port. P ort mirroring is configured by sele cting a [...]

Update with your book title 113 The following restrictions apply to po rts configur ed to be source ports: • Source P orts cannot be a LAG member . • P orts cannot be configured as a destination port. • All pack ets are transmitted tagged from the destination port. • Monitor ed all RX/TX packets to the same port. T o open the P ort Mirrorin[...]

114 Update with your book title 6 Click Apply Changes . The new source po rt is defined, and th e device is updated. 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, and the device is updated. Configuring Addre[...]

Update with your book title 115 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 value is 300 seconds. • Interface — Specifies the interface for which the table is qu[...]

116 Update with your book title 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 the Dynamic Addr[...]

Update with your book title 117 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. The possible fi[...]

118 Update with your book title • 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 is provided in [...]

Update with your book title 119 Defining STP Port Settings The STP P ort Settings page contains fields for assigning ST P properties to indi vidual ports. T o open the STP P ort Settings page, click Switch → Spanning T ree → P o rt Settings in the tree view . Figure 7-17. STP Port Settings • Select a P ort — P ort on which STP is enabled. ?[...]

120 Update with your book title • Po r t S t a t e — The current port STP state. If enabled, the port state determines what forwar ding 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 learn MAC addres [...]

Update with your book title 121 • P riority (0-240, in steps of 16) — The priority value of the port. The priority value influences the port choice when a bridge has two ports con nected in a loop. The priority valu e is between 0-240. The priority value is provided in incr ements of 16. • Designated Bridge ID — The bridge priority and the [...]

122 Update with your book title 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 info rmation,[...]

Update with your book title 123 • 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 — The LAG is b[...]

124 Update with your book title 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 guaran tees pr[...]

Update with your book title 125 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 device. – Design[...]

126 Update with your book title – Disable — Device establishes shared, half duplex links. – Aut o — Device automatically determines the state. • P oint-to-P oint Operational Status — Displays the point-to-point operating state which depends on a link partner . • Activate P rotocol Migration T est — Select to run a Protocol Migrat io[...]

Update with your book title 127 Figure 7-20. VLAN Membership • Show VLAN — Lists and displays specific VLAN in form 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 A N — When selected, removes the[...]

128 Update with your book title 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 . The VLAN mem[...]

Update with your book title 129 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 VLAN P ort Membership T able . Assigning Ports to a VLAN Group 1 Open the VLAN Membership page. 2 Click the VLAN ID or VLAN Name option button and select a VL AN from th[...]

130 Update with your book title 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 Settings page, click[...]

Update with your book title 131 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 that ar e part of a VLAN. VLANs can either be compo sed of indivi dual ports or [...]

132 Update with your book title Figure 7-24. VLAN LAG Setti ng • LAG — The LAG number included in the VLAN. • PVID — Assigns a VLAN ID to unt agged packets. The po ssible field values are 1-40 95. VLAN 4095 is defined as per standard and industry practice, as th e discard VLAN. P ackets classified to this VLAN are dropped. • Fr a m e T y [...]

Update with your book title 133 Aggregating Ports P ort Aggr egation optimizes port usage by linking a grou p of ports to gether to fo rm a sing le 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 four LAGs, each havin[...]

134 Update with your book title Defining LAG Membership The LA G Membership page contains fields for assigning ports to LAGs. LAGs can include up to 6 ports. When a port is added to a LAG, the port acquir es the LAG’s properties. If the port cannot be configured with the LAG properties, a trap is generated an d the port operates with its default [...]

Update with your book title 135 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 port s/nodes may[...]

136 Update with your book title 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 ed to the Mul[...]

Update with your book title 137 • Po r t s — P ort that can be added to a Multicast service . • LAGs — LAGs that can be added to a Multicast service. 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 Multicas[...]

138 Update with your book title 4 T oggle a port to S to join the port to the selected Multicast group. 5 T oggle a port to F to forbid adding specific Multic ast addresses to a specific port. 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 Se[...]

Update with your book title 139 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 port/LAG is ex cl[...]

140 Update with your book title 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 Router or Switch 1 [...]

Update with your book title 141 IGMP Snooping The IGMP Snooping page contains fields for adding IGMP me mbers. T o open the IGMP S nooping 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 snooping on [...]

142 Update with your book title 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. Displaying the IGM[...]

Update with your book title 143 8 V iewing Statistics The Statistic pages contains links to device info rmation for RMON , and CPU utilization.[...]

144 Update with your book title V iewing RMON Statistics Remote Monitoring (R MON) contains links for viewing network information from a remote location. T o open the RMON page , click Statistics/R MON → RMON in the tree view . Viewing RMON Statistics G roup The RMON Statistics Group page contains fields for viewing info rmation about device util[...]

Update with your book title 145 • Interface — Specifies the port or LAG for which statistics are displayed. • Refresh Rate — Amount of time that passes before the statistics are r efreshed. • Drop Events — Number of dropped events that have occu rred on the interface since the device was last refreshed. • Received Bytes (Octets) — N[...]

146 Update with your book title Viewing the CPU Uti lization The CPU Utilizatio n page contains in formation about the syst em’s CPU utilization and percentage of CPU r esources consumed by each stacking member . Ea ch stacking membe r is assigned a color on the graph. The range of the utilization reading is from 0 to 200%. The maximum reading of[...]

Update with your book title 147 9 Configuring Quality of Service This section provides information for defining an d configuring Quality of Service (QoS) parameters. T o open the Quality of Serv ice page, click Quality of Service in the tree view . An implementation example that requires QoS includ es certain types of traffic such as V oice, Video [...]

148 Update with your book title 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 ar e assigned to a specif ic queue, CoS services can be assign ed to the queue(s). Output queues are configured [...]

Update with your book title 149 Defining CoS Global Parameters Class of Service (CoS) global parameters are set from the CoS Settings page. T o open the CoS Settings page, click Quality of Ser vice → CoS Global P arameters → CoS Settings in the tree view . Figure 9-1. CoS Settings • Cos Mode — Enables or disables man aging network traffic u[...]

150 Update with your book title Tr u s t i s s e l e c t e d . Defining QoS Interface Settings The Interface Settings page contains fields for defi ning, per interface, if the se lec te d T ru st m od e is t o b e activated. The default priority for incoming untagged packets is al so selected in t he Interfac e Settings page. T o open the Interface[...]

Update with your book title 151 2 Click Show All . The QoS Interface Settings T able page opens: Figure 9-3. QoS Interface Settings T able Defining Queue Settings The QoS Queue Setting s page contains fields fo r configuring the scheduling method by which the queues are maintained. T o open the QoS Queue Settings page click Quality of Ser vice → [...]

152 Update with your book title • WRR — Specifies if traffic s cheduling is base d on the W eighted Round Robin (WRR) weights to egress queues. The default values ar e: – 8 for Queue 1 – 4 for Queue 2 – 2 for Queue 3 – 1 for Queue 4 • WRR W eights — The WRR weight assigned to each queue. • WRR P e rcentage — The WRR percentage o[...]

Update with your book title 153 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 able • Class o[...]

154 Update with your book title 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 or the list of the DSCP default queue settings, see "DSCP to Queue Mapping T able Default V alues" on page 148. T o open the DSCP to Queue page, click Quality of Ser vice → CoS Glo[...]

Update with your book title 155 1 Open the DSCP to Queue page. 2 Check the Res to r e D e fa ul t s checkbox. 3 Click Apply Changes . The default values are r estored.[...]

156 Update with your book title[...]

Dell PowerConnect 28xx Sy stems User Guide 157 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 lable 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 [...]

158 Dell PowerConnect 28xx Sy stems User Guide 2 In the Run window , typ e 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[...]

Dell PowerConnect 28xx Sy stems User Guide 159 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 acce ss and list the Privileged EXEC Mode commands: 1 At the prompt type enable and press [...]

160 Dell PowerConnect 28xx Sy stems 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 Sy stems User Guide 161 CLI Commands Command: asset-tag T o specify the device’s asset tag, use the asset-tag command. asset-tag asset-tag Syntax Description • asset-tag — The asset-tag to be assigned to the devi ce. Parameters range • asset-tag — W ord: 1-16 characters. Command: copy T o copy any file from a source[...]

162 Dell PowerConnect 28xx Sy stems User Guide Command Mode P rivileged EXEC Usage Guidelines The location of a file system dictates th e format of the source or destination URL. The entire copying process may take several minutes and differs from protocol to protocol and from network to network. If the egress interface is not specified, the defaul[...]

Dell PowerConnect 28xx Sy stems User Guide 163 Command: do T o ex ecute an EXEC-level command from global conf iguration m ode or any co nfiguration submode, use the do command in any configuration mode. do command Syntax Description command — The EXEC command to be executed. Command modes All configuration modes Command: end T o end the current [...]

164 Dell PowerConnect 28xx Sy stems User Guide Command Mode All configuration modes Default value This command has no default setting. Examples Console(config-if)# exit Console(config)# exit Console# Command: exit (EXEC) T o cl ose an active te rminal sess ion by loggin g off the router , use the exit command in EXEC mode. exit Syntax Description T[...]

Dell PowerConnect 28xx Sy stems User Guide 165 Default value This command has no default setting. Command: interface eth ernet T o configure an interface type and ente r interface configuration mode, use the interface ethernet global configuration command. interface ethernet interface Syntax Description • interface — The full syntax is: port . [...]

166 Dell PowerConnect 28xx Sy stems User Guide Example Console (config)# interface port-channel 1 Console (config-if)# Command: interface vlan T o configure a vl an type and enter interface configuration mo de, use the interface vlan global configuration command. interface vlan vlan-i d Syntax Description • vlan-id — VLAN ID Parameters range ?[...]

Dell PowerConnect 28xx Sy stems User Guide 167 Parameters range • ip-address — V a lid IP address in the form A.B.C.D. Command: ip default-ga teway T o define a default gateway (router), use the ip defa ult-gate way global configuration comm and. T o remove the default gateway use the no form of this command. ip defaul t-gateway ip-address no i[...]

168 Dell PowerConnect 28xx Sy stems User Guide • hostname — Hostname to ping. • packet_size — Number of bytes in a packet. The default is 56 bytes. The actual packet size will be eight bytes larger than the size specified because the switch adds header information. • packet_count — Number of packets to send, from 1 to 65535 pack ets. Th[...]

Dell PowerConnect 28xx Sy stems User Guide 169 ----10.1.1.1 PING Statistics---- 4 packets transmitted, 4 packets received, 0% packet loss round-trip (ms) min/avg/max = 7/8/11 Console> ping yahoo.com Pinging yahoo.com [66.218.71.198] with 64 bytes of data: 64 bytes from 10.1.1.1: icmp_seq=0. time=11 ms 64 bytes from 10.1.1.1: icmp_seq=1. time=8 m[...]

170 Dell PowerConnect 28xx Sy stems User Guide show tech-support [config] [memory] Syntax Description • memory — (Optional) Displays memo ry and processor state data. • config — (Optional) Displays switch configuratio n within the CLI commands supported on the device. Defaults By default, this command displays th e output for technical-supp[...]

Dell PowerConnect 28xx Sy stems User Guide 171 show interfaces counters show users show sessions show logging fi le show logging If you specify the memory keyw o rd , t h e show tech-support command displays the output: flash info ( dir if existed, or flash mapping) buffers info (like print os buff ) memory info (like print os mem ) proc info (like[...]

172 Dell PowerConnect 28xx Sy stems User Guide Usage Guidelines The logical key of the command is the pair (community , ip-address). If ip-address is omitted then the key is (community , All-Ips). Examples Switch(conf)# snmp-server community public Command: username T o es tablish a username-based authentication sy stem, use the username command in[...]

Glossary 173 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 followi[...]

174 Glossary Baud The number of signaling ele ments transmitted each second. Best Effort T raffic is assi gned 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 configurat[...]

Glossary 175 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 [...]

176 Glossary F FFT Fa s t F o r w a rd T a b l e . P rovides information about forwar ding routes. If a pack et arrives to a device with a known route, the packet is forwarded via a route listed in the FFT . If ther e is not a known route, the CPU forwar ds the packet and updates the FFT . FIFO F irst In F irst Out. A queuing process where the firs[...]

Glossary 177 IEEE Institute of Electrica l and Electro nics Engineers. An Engineering organization that develops communications and networking standards. IEEE 802.1d Used in the Spanning T r ee P rotocol, IEEE 802.1d supports MAC bridging to avoid network loops. IEEE 802.1p P rioritizes network traffic at the data-link/MAC sublayer . IEEE 802.1Q De[...]

178 Glossary Load Bal ancing Enables the even distributio n of data and/or processing packets acro ss available network resources. F or example, load balancing may distribute the incoming p ackets evenly to all servers, or redir ect the packets to the ne xt available server . M MAC Address Media Access Control Address . The MAC Addr ess is a hardwa[...]

Glossary 179 O OID Object Identifier . Used by SNMP to identify managed objects. In th e SNMP Manager/ Agen t network management pa radigm, each managed object must have an OID to identify it. P Pa c k e t s Blocks of information for transmission in packet switched systems. PDU P rotocol Data Uni t. A data unit specified in a layer protocol consist[...]

180 Glossary RSTP Rapid Spanning T ree P rotocol . Detects and uses network topologies that a llow a faster convergence of the spanning tree, without cr eating forwarding loops. 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[...]

Glossary 181 T TCP/IP T ransmissions Control Protocol . Enables two hosts to communicate and ex change data streams. TCP guarantees pack et delivery , and guarante es packets are transmitted and r eceived in the order their sent. Te l n e t T erminal Emul ation P rotocol. Enables system users to log in and use r esources on remote networks. TFTP T [...]

182 Glossary[...]

Index 183 Index Numerics 802.1d, 15 A Access mode, 76 Address Res olution P rotocol, 173 Aggr egated link, 133 AH, 173 ARP , 173 Asset, 59 Auto-Negotiation, 36 B Boot V ersion, 174 BootP , 174 BPDU, 174 Bridge P rotocol Data Unit, 174 Buttons, 56 C Cables, 65, 67 CIDR, 174 Command Mode Overview , 158 Community table, 76 CoS, 150 D Defining devi ce [...]

184 Index IEEE, 177 IEEE 802.1d, 177 IEEE 802.1p, 177 IEEE 802.1Q, 177 IGMP , 177 Image F ile, 80, 177 Ingress, 177 Interface mode, 160 Internetwork P ac ket Ex change, 177 IP , 177 IPM, 177 IPX, 177 ISIS, 177 J Jumbo frames, 177 L L2TP , 177 LAG, 106, 177 LAGs, 138 Local User Database, 69 Loops, 116 M MAC Addr ess, 178 MAC addr ess, 114 Management[...]

Index 185 Spanning T ree P rotocol, 116, 124 Startup file, 80 Storm control, 110 STP , 15, 1 17, 125 System, 59 T TFTP , 181 Time Domain Reflectometry , 65 Tr e e v i e w, 5 3 T rivial F ile T ransfer P rotocol, 181 T runk Configuration Pa g e , 1 0 6 Tr u s t , 1 5 0 U UDP , 181 Understanding the interface, 53 Uploading files, 82 User Data P rotoc[...]

186 Index[...]