Manuale d’uso / di manutenzione del prodotto MIL-W2332G del fabbricante Milan Technology
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MIL-W2332G Sh Air™ AccessG Pro Wireless Access Point/Bridge with PoE USER GUIDE.
ii.
i Regulatory Approval - FCC Class A - UL 1950 - CSA C22.2 No. 950 - EN60950 - CE - EN55022 Class A - EN55024 Canadian EMI Notice This Class A digital apparatus meets all the requirements of the Canadian Interference-Causing Equipm ent Regulation s.
ii Federal Communication Commissi on Interference Statement This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reason able protec- tion against harmful interference in a residential installation.
iii R&TTE Compliance Statement This equipment complies with all the requirements of DIRECTIVE 1999/5/CE OF THE EURO- PEAN PARLIAMENT AND THE COUNCIL OF 9 March 1999 on radio equipment and telecom- munication terminal equipment and the mutual recognition of their conformity (R&TTE).
iv Table of Contents 1. Introduction 1.1. Overview 1.2. Features 1.3. LED Definitions 2. First-Time Installa tion and Configuration 2.1. Selecting a Power Supply Method 2.2. Mounting the AP on a Wall 2.3. Preparing for Configuration 2.3.1. Connecting the Managi ng Computer and the AP 2.
v 3.1.1. Menu Structure 3.1.2. Save, Save & Restar t, and Cancel Commands 3.1.3. Home and Refresh Commands 3.2. Viewing Status 3.2.1. Associated Wireless Clients 3.2.2. Current DHCP Mappings 3.2.3. System Log 3.2.4. Link Monitor 3.3. General Operations 3.
vi 3.5.1.3. Association Control 3.5.1.4. AP Load Balancing 3.5.1.5. Wireless Di stribution System 3.5.2. Security 3.5.2.1. Basic 3.5.2.2. MAC-Address- Based Access Control 3.5.3. IEEE 802. 1x/RADIUS 3.6. Configuring Advanced Settings 3.6.1. Packet Filters 3.
1 1. Introduction 1.1 Overview The MIL-W2332G Sh Air AccessG Pro Wireless Access Point/Bridge enabl es IEEE 802.11g or IEEE 802.11b client computers to access the resources on the Ethernet network.
2 IEEE 802.1x/RADIUS. When the AP is in AP/Bridge m ode, it can be configured to authenticate wireless users and distri bute encryption keys dynamically by IEEE 802.1x Port-Based Network Access Control and RADIUS (Remote Au- thentication Dial-In User Service).
3 high-gain antennas for different purposes. • DHCP client. The AP can automatically obtain an IP address from a DHCP server. • DHCP server. The AP can automatically assign IP addresses to computers or other devices by DHCP (Dynamic Host Configuration Protocol).
4 SNMP. SNMP (Simple Network Management Protocol) MIB I, MIB II, IEEE 802.1d, IEEE 802.1x, and Private En terprise MIB are supported. UpnP. The AP responds to UpnP discovery messages so that a Windows XP user can locate the AP in My Network Places and use a Web browser to config- ure it.
5 2. First-Time Installation and Configuration 2.1 Selecting a Power Supply Method Optionally, the AP can be powered by the s upplied power adapter or PoE (Power over Ethernet). The AP autom atically selects the suitable one dependin g on your decision.
6 Fig. 1. Mounting the AP on a wall. 2.3 Preparing for Configuration For you to configure an AP, a managing computer with a Web browser is needed. For first-time configuration of an AP, an Ethernet network inte rface card (NIC) should have been installed in the managing computer.
7 2.3.1 Connecting the Managing Computer and the AP To connect the Ethernet m anaging computer and the managed AP for first-time con- figuration, you have two choices as illustrated in Fig. 2. Mana ging Comp uter Normal Ethe rnet cable Sh Ai r Ac c es sG Pro AP Normal Ethernet cable Eth ernet Hub/Switch Cros s-o ve r Ethe rnet cable Fig.
8 2.4 Configuring the AP After the IP addressing issue is resolved, launch a Web browser on the managing computer. Then, go to “ http:// Error! Reference source not found.” to access the Web-based Network Manager Start page. TIP: For maintenance configuration of an AP, the AP can be reached by its host name using a Web browser.
9 Fig. 4. The S tart p age. 2.4.2 Step 1: Selecting an Operational Mode Fig. 5. Operational modes settings. Go to the General, Operational Mode section, select an ope rational mode and click Save at the bottom of this page, and then y ou are brought back to the start page.
10 • AP Client. This mode is for Dynamic LAN-to-LAN Bridging. The AP Client auto- matically establishes bridge lin ks with APs from any vendors. In either mode, the AP forwards packets between its Ethernet inte rface and wireless in- terface for wired hosts on the Ethernet side and wireless hos t(s) on the wireless side.
11 2.4.3 Step 2: Configuring TCP/IP Settings Fig. 6. TCP/IP settings. Go to the TCP/IP, Addressing section to configure IP address settings. The IP address can be manually set or automatically assigned by a DHCP server on the LAN.
12 2.4.5 Step 4: Reviewing and Applying Settings Fig. 8. Settings changes are highlighted in red . On the start page, you can review all the settings you have made. Changes are high- lighted in red . If they are OK, click Restart to restart the AP for the new settings to take effect.
13 2.5 Deploying the AP After the settings have been configured, deploy the AP to the field application environ- ment. Connect the AP to an Ethernet LAN through an Ethernet switch/hub.
14 Fig. 10. Antenna alignment assistance. Instead of using PING.exe, you can run Wi reless Network Manager on Computer 1, and go to the Antenna Alignment tab. Click Start to begin monitoring the WDS link quality. Adjust the alignment of t he antenna of Bridge 1 until the Link quality indicator shows a relatively maximal value.
15 2.6 Setting up Client Computers The TCP/IP and IEEE 802.11g-related settings of wireless client co mputers must match those of the AP. 2.6.1 Configuring IEEE 802.
16 2.7 Confirming the Settings of the AP and Client Computers After you have completed deploying the AP and setting up client computers, you have to make sure the settings you have made are correct. 2.7.1 Checking if the IEEE 802.11g-Related Settings Work To check if a wireless client com puter can associate with the AP: 1.
17 5. Type “ ping 2nd_dns_server ”, where 2nd_dns_server is a placeholder for the IP address of the secondary DNS server of the wireless c lient computer. Then press Enter . If this DNS server responds the client should have no probl em with TCP/IP net- working; else, see Appendix B-2, “TCP/IP Settings Problems” for troubleshooting.
18 3. Using Web-Based Network Manager In this chapter, we’ll explain each W eb management page of the Web-based Network Manager. 3.1 Overview Fig. 12.
19 3.1.1 Menu Structure The left side of the start page contains a menu for you to carry out commands. Here is a brief description of the hyperlinks on the menu: • Home. For going back to the start page. • Status. Status information. Wireless Clients.
20 RADIUS (Remote Authenticat ion Dial-In User Service) settings for better wire- less security. • Advanced. Advanced settings of the AP. Packet Filters. Ethernet Type Filters, IP Protoc ol Filters, and TCP/UDP Port Filters settings. Management.
21 3.1.2 Save, Save & Restart, and Cancel Commands Fig. 13. Save, Save & Restart, and Cancel. At the bottom of each page that contains setti ngs you can configure, there are up to three buttons— Save , Save & Restart , and Cancel .
22 3.1.3 Home and Refresh Commands Fig. 15. Home and Refresh. At the bottom of each status page that shows read-only info rmation, there are two but- tons— Home and Refresh . Clicking Home brings you back to the start page. Clicking Refresh updates the shown status information.
23 3.2.2 Current DHCP Mappings Fig. 17. Current DHCP mappings. On this page, all the current static or dynamic DHCP mappings are shown. A DHCP mapping is a correspondence relationship between an IP address assigned by the DHCP server and a computer or device that obtains the IP address.
24 3.2.3 System Log Fig. 18. System log. System events are recorded in the memory of the AP. The logged information is useful for troubleshooting purposes. The system events are divided into several categories, and you can select which categories of events to log.
25 3.3 General Operations 3.3.1 Specifying Operational Mode Fig. 20. Operational modes settings. The AP supports 2 operational modes: • AP/Bridge. This mode provides both Access Point and Static LAN-to-LAN Bridging functionality. The static LAN- to-LAN bridging function is supported through Wireless Distribution System (WDS).
26 AP/Bridge WDS STA-AP AP Client STA-AP To establish a static bridge link based on WDS, the AP/br idges at both end of the WDS link must be manually configured with each other’s MA C addresses (see Section 0 for more information).
27 3.3.3 Managing Firmware Fig. 22. Firmware management protocol setting. Firmware management operati ons for the AP include firmware upgrade , configuration backup , configuration restore , and configuration reset . Firmware upgrade, configuration backup, and configuration restore ca n be achieved via HTTP or TFTP.
28 3.3.3.2 Backing up and Restoring Configuration Settings by HTTP Fig. 24. Firmware backup by HTTP . To back up configuration of the AP by HTTP: 1. Click Ba ck Up . 2. You’ll be prompted to open or save the configuration file. Click Save . 3. The configuration file is named by the AP’s MAC address.
29 3.3.3.3 Upgrading Firmware by TFTP Fig. 26. TFTP server settings. When use TFTP as the firmwar e management protocol, you can configure settings for the AP’s TFTP client to communicate with a TFTP server.
30 8. Trigger the firmware upgrade process by clicking Upgrade . Fig. 28. TFTP Server . NOTE: After the dialog box of the TFTP server program appears, be sure to specify the working folder within which the downloaded firmware files reside. NOTE: Make sure the Accept read requests check box of TFTP Server is selected.
31 3.3.3.4 Backing up and Restoring Co nfiguration Settings b y TFTP Fig. 29. Configurat ion backup/restore. To back up configuration of the AP by TFTP: Get a computer that will be used as a TFTP server and as a managing computer to trigger the backup process.
32 4. On the computer, run the TFTP Server utility. And specif y the folder in which the configuration backup file resides. A config uration backup file is named by the AP’s MAC address. For example, if the AP’ s MAC address is 00- 01-02-33-44-55, the configuration backup file should be “000102334455.
33 3.4 Configuring TCP/IP Related Settings 3.4.1 Addressing Fig. 31. TC P/IP setting s. The IP address of the AP can be manually set ( Set Manually ) or automatically assigned by a DHCP server on the LAN ( Obtain from a DHCP Server ).
34 3.4.2 DHCP Server 3.4.2.1 Basic Fig. 32. Basic DHCP server settings. The AP can automatically assign IP addresses to client computers by DHCP. In this section of the management page, you can specify the Default gateway , Subnet mask , Primary DNS server , and Secondary DNS server settings that will be sent to a client at its request.
35 3.4.2.2 Static DHCP Mappings Fig. 33. S tatic DHCP ma ppings. IP addresses of servers are often static so that clients could alwa ys locate the servers by the static IP addresses. By Static DHCP Mappings , you can ensure that a host will get the same IP address when it requests one from the DHCP serv er.
36 3.5 Configuring IEEE 802.11g-Related Settings 3.5.1 Communication 3.5.1.1 Basic Basic IEEE 802.11g-related communication settings include AP functionality , RF t ype , Regulatory domain , Channel number , Network name (SSID) , Data rate , and Transmit power .
37 3.5.1.2 Link Integrity Fig. 35. Link integrity settings. When the Ethernet LAN interface is detect ed to be disconnected from the wired network, all currently associated wireless clients ar e disassociated by the AP and no wireless client can associate with the AP.
38 3.5.1.5 Wireless Distribution System LA N AP 2 Notebook Computer AP 1 WDS Fig. 38. Wireless Distribution System. Traditionally, access points are connected by Ethernet. By Wireless Distribution System (WDS), Aps can communicate with one another wirelessly.
39 Fig. 40. Wireless Distribution System settings. To enable a WDS link: 1. Specify the MAC addre ss of the AP at the other end of the WDS link. 2. Select the corresponding Enabled check box. For example, assume you want two APs with MAC addresses 00-02-65-01-62-C5 and 00-02-65-01-62-C6 to establis h a WDS link between them .
40 Fig. 41. Sample wireless bridge network topology . WARNING: Don’t let your network topology consis ting of wireless bridges, Ethernet switches, Ethernet links, and WDS links contain loops . If any loops exist, packets will circle around the loops and network perfo rmance will be seriously degraded.
41 Fig. 43. Link health monitoring. Run Wireless Network Manager on a computer and locate the AP you want to manage. Go to the WDS tab, and then click Test . The test results ( OK or Broken ) will be shown in the Link Status column of the WDS links table.
42 Brid ge 1 WDS L ink Computer 1 Computer 2 Bridge 2 PING (ICMP Echo Request) IC MP Ec ho R ep l y Adju st anten na alignmen t Fig. 44. Adjusting alignments of external directional antennas. TIP: You can make use of the Antenna Alignment Assistance feature to help you align the directional antennas.
43 3.5.2 Security IEEE 802.11g security settings include SSID broadcasts , Wireless client isolation , Security mode , IEEE 802.11 Authentication algorithm , WEP keys , MAC-Address-Based Access Control . 3.5.2.1 Basic Fig. 46. Basic IEEE 802.1 1g security settings.
44 AP 1 AP 2 STA 1 STA 2 STA 3 W ireles s Link Ethernet Link Switch WCI : This AP Only WCI : This AP Only Fig. 47. Behavior of the “This AP Only” wireless client isolation option. AP 1 AP 2 STA 1 STA 2 STA 3 W ireles s Link Ethernet Link Switch WCI : Al l AP s in T h is Subnet WCI : Al l AP s in T h is Subnet Fig.
45 • Static WEP. WEP (Wired Equivalent Privacy) ke ys must be manually configured. • Static TKIP (WPA-PSK). Only TKIP (Temporal Key Integrity Protocol) mechanism of WPA (Wi-Fi Protected Acce ss) is enabled.
46 3.5.2.2 MAC-Address-Based Access Control Fig. 49. MAC-address-based access control settings. With MAC-Address-Based Access Control , you can specify the wireless client com- puters that are permitted or not permitted to associate with the AP. When the table type is set to inclusive , entries in the table are permitted to associate with the AP.
47 Fig. 50. MAC ACL download settings. Instead of manually entering MAC addresses to the access control table one by one, you can prepare a text file that contains all the MAC addresses and put it on a TFTP server, and then command the AP to download the MAC ACL (Access C ontrol List) file from the TFTP server.
48 3.5.3 IEEE 802.1x/RADIUS IEEE 802.1x Port-Based Network Access Control is a new standard for solving some security issues associated with IEEE 802.11, such as lack of user-based authentication and dynamic encryption key distribution. With IEEE 802.
49 RADIUS servers. When the pr imary RADIUS server fails to respond, the wireless ac- cess point will try to communi cate with the secondary RADIUS server. You can specify the length of timeout and the number of retries bef ore communicating with the secon- dary RADIUS server after failing to communi cate with the primary RADIUS server.
50 3.6 Configuring Advanced Settings 3.6.1 Packet Filters The AP provides layer 2 (Ethernet Type Filters) , layer 3 (IP Protocol Filters), and layer 4 (TCP/UDP Port Filters) filter ing capabilities. The configurat ion processes for the filters are similar.
51 3.6.1.2 IP Protocol Filters Fig. 55. IP p rotocol filters settings. The protocol, source address, and destination address fields of a packet incoming from the WLAN or Ethernet interfac e is inspected for filtering.
52 3.6.2 Management 3.6.2.1 UPnP Fig. 57. UpnP settings. UpnP (Universal Plug and Play) enables a Wi ndows XP user to automatically discover peripheral devices by HTTP. When the UpnP functionality is enabled, you can see the AP in My Network Places of Wi ndows XP.
53 3.6.2.2 System Log Fig. 58. System log settings. System events can be logged to the on-board RAM of the AP ( Local log ) or sent to a remote computer on which an SNMP trap monitor program runs ( Remote log by SNMP trap ). See the next subsection for more information about SNMP trap settings.
54 3.6.2.3 SNMP Fig. 59. SNMP settings. The SNMP (Simple Network Management Protocol) functionality can be disabled, and you can specify the name (used as a password ) of the read-only and read-write com- munity. In addition, up to 5 SNMP trap targets can be set in the SNMP Trap Table .
55 Appendix A: Default Settings TIP: Press the Default ( SF-Reset , or Soft-Reset ) switch on the housing of a pow- ered-on AP to reset the configuration settings to factory-default values. Setting Name Default Value Global User Name root Password root IEEE 802.
56 System Log Local Log SNMP Enabled SNMP read community public SNMP write community private Telnet Enabled.
57 Appendix B: Troubleshooting Check the following first: • Make sure that the power of the AP is on and the Ethernet cables are connected firmly to the RJ-45 jacks of the AP. • Make sure that the LED ALV of the AP is blinking to indicate the AP is working.
58 B-2: TCP/IP Settings Problems Defa ul t Gate way of Client C omputer AP IEEE 802.1 1g S tage A State B Cor responden t Host S tage D Client Comput er DNS Server of Clie nt Comput er Ethernet LAN Internet Fig. 60. Communication stages for a client to re ach its corre spondent host.
59 Use the OS-provided command-line network tool, route.exe , to modify the contents of the routing table. Use Windows-provided Device Manager to disable unnecessary NICs. Is the underlying link (Ethernet or IEEE 802.11g) established? Make sure the Ethernet link is OK.
60 B-3: Unknown Problems • The AP has been set to obtain an IP address automaticall y by DHCP. How can I know its acquired IP address so that I can manage it using a Web browser? Use the utility, Wireless Router/AP Browser ( WLBrw sr.exe ), in the “ Utilities ” folder on the companion CD-ROM disc.
61 Appendix C: Additional Information C-1: Firmware Upgrade Using Xmodem Upgrade Fig. 62. Xmodem Upgrade. To upgrade the firmware of AP using Xmodem Upgrade over RS232: 1. Power off the AP whose firmware will be upgraded. 2. Connect the managing PC and the AP with an RS232 Null Modem cable.
62 90000435 Rev A.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Milan Technology MIL-W2332G è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Milan Technology MIL-W2332G - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Milan Technology MIL-W2332G imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Milan Technology MIL-W2332G ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Milan Technology MIL-W2332G, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Milan Technology MIL-W2332G.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Milan Technology MIL-W2332G. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Milan Technology MIL-W2332G insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
