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MicroNet SP915A, Руководство пользователя

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4.2.2  TCP/IP Settings Problems 

For a wireless client computer to communicate with a correspondent host on 
the Internet by the host’s domain name (e.g. 

http://www.micronet.info

), first 

sends a DNS request to a DNS server on the Internet. The DNS request 
travels first to the AP, and then the AP relays this request to the default 
gateway of the client computer. Finally, this request is forwarded by the 
gateway to the DNS server on the Internet. The DNS reply issued by the DNS 
server is transmitted back to the client computer following a reverse path. 
When the client computer receives the DNS reply, it knows the IP address of 
the correspondent host and sends further packets to this IP address. 

 

 

As illustrated in above figure, the communication path could be broken at 
some of the stages. The OS-provided network diagnostic tool, ping.exe, can 
be employed to find out TCP/IP-related communication problems. 

 

 
 
 
 

 

39

Содержание SP915A

Страница 1: ...User s Manual Wireless LAN Outdoor AP Bridge Model No SP915A http www micronet info...

Страница 2: ...via Web Based UI 8 2 5 1 Operational Mode 8 2 5 2 IP Address 10 2 5 3 Wireless Settings 10 2 5 4 Restart Device 10 2 6 Installation 11 2 7 Setting up Client Computers 12 2 7 1 Configuring SP915A Rela...

Страница 3: ...Menu 24 3 6 1 Communication 24 3 6 2 Security 27 3 6 3 IEEE 802 1x RADIUS 31 3 7 Configuring Advanced Settings 33 3 7 1 Packet Filters 33 3 7 2 Management 35 Chapter 4 Appendix 37 4 1 Appendix A Defau...

Страница 4: ...1 1 Package Contents Prior to the installation of the device please verify the following items are in the package y SP915A Wireless LAN Outdoor AP Bridge y Quick Installation Guide y Manual CD y 1 2M...

Страница 5: ...AP Bridge y DHCP Server Client including static DHCP mappings y Provides Layer 2 Layer 3 and Layer 4 filtering capabilities y System Log local log and remote log by SNMP y Supplying power to an AP ove...

Страница 6: ...t SP915A with a wall mount kit 1 1 Put the M6 90 screw into wall mount 1 2 Fix the wall mount 1 to the bottom of SP915A by using M4 80 screw 3 Fix the SP915A to the pole with the wall mount 1 using M6...

Страница 7: ...astic conical anchor in each hole 4 Screw a supplied ST3 9 20 screw in each plastic conical anchor for a proper depth so that the wireless AP can be hung on the screws 5 Fix two wall mounts 1 to the b...

Страница 8: ...tion 2 3 Preparing for Configuration For users to configure the SP915A a managing computer with a Web browser is needed For first time configuration of an SP915A an Ethernet network interface card NIC...

Страница 9: ...a connection e g LAN The following screen will appear Step 2 Select Internet Protocol TCP IP and then click on the Properties button The screen will appear to allow entry of TCP IP settings Step 3 Sel...

Страница 10: ...guration and status of the system After configuration of IP the management interface can be access by entering the IP address of the router into the browser Step 1 Login page will appear to prompt use...

Страница 11: ...face to save changes 2 5 1 Operational Mode Go to the General menu and click Operational Mode to select a mode for the AP The AP supports 2 operational modes y AP Bridge This mode provides both Access...

Страница 12: ...is actually an STA y WDS This type of wireless link is established between two IEEE 802 11 APs Wireless packets transmitted along the WDS link comply with the IEEE 802 11 WDS Wireless Distribution Sys...

Страница 13: ...e AP 2 5 3 Wireless Settings Go to the IEEE 802 11 menu and click Communication to set wireless parameters for the AP 2 5 4 Restart Device After pressing Save on each page the interface will be bought...

Страница 14: ...gure the data rate of each AP to the lowest value 1Mbps Step 2 Fix the alignment of the antenna on one side Run PING function in DOS environment between the two APs Response time from the PING will in...

Страница 15: ...the AP 2 7 1 Configuring SP915A Related Settings Before the TCP IP networking system of a wireless client computer can communicate with other hosts the underlying wireless link must be established be...

Страница 16: ...less client computer and the SSID of the AP must be identical Or in case the SSID broadcasts capability of the AP is enabled by default the SSID of the wireless client computer could be set to any y B...

Страница 17: ...ser will proceed to the following page containing overview of AP s settings 3 2 Menu Structure The left side of the start page contains a menu for users to carry out commands Here is a brief descripti...

Страница 18: ...HCP Dynamic Host Configuration Protocol server on the AP y IEEE 802 11 IEEE 802 11b related settings Communication Basic settings for the IEEE 802 11b interface of the AP to work properly with wireles...

Страница 19: ...discards any settings changes and brings users back to the start page If users click Save the start page will reflect the changed settings and followed by two buttons Restart and Cancel In addition c...

Страница 20: ...including its MAC address IP address user name if the client has been IEEE 802 1x authenticated number of bytes it has send number of bytes it has received and the time of its last activity are shown...

Страница 21: ...and Allocatable IP address count settings on the DHCP Server configuration page 3 3 3 System Log System events are recorded in the memory of the AP The logged information is useful for troubleshooting...

Страница 22: ...oth Access Point and Static LAN to LAN Bridging functionality The static LAN to LAN bridging function is supported through Wireless Distribution System WDS y AP Client This mode is for Dynamic LAN to...

Страница 23: ...AP AP Client STA AP To establish a static bridge link based on WDS the AP bridges at both end of the WDS link must be manually configured with each other s MAC addresses To establish a dynamic bridge...

Страница 24: ...me Web browsers If users cannot successfully perform HTTP based firmware management operations with the Web browser try the TFTP based method Upgrade Firmware via HTTP y Click Browse and then select a...

Страница 25: ...upload the configuration file to the AP Resetting Configuration to Factory Defaults Clicking the Reset button resets the device configuration to factory defaults 3 5 TCP IP Related Settings 3 5 1 Addr...

Страница 26: ...ame IP address when it requests one from the DHCP server Therefore instead of configuring the IP address of an intranet server manually you can configure the server to obtain an IP address by DHCP and...

Страница 27: ...s client computer and the SSID of the AP must be identical for them to communicate with each other y If there is RF interference users may want to reduce the Data rate for more reliable wireless trans...

Страница 28: ...policy can be by Number of Users or by Traffic Load If the Number of Users policy is selected a new wireless user can only associate with an AP that has the smallest number of associated wireless use...

Страница 29: ...e of AP repeater By WDS two or more LAN segments can be connected wirelessly As illustrated in the below diagram a pair of wireless LAN to LAN bridges is used to connect two LAN segments Since the AP...

Страница 30: ...client isolation setting is set to This AP Only wireless clients of this AP cannot see each other and wireless to wireless traffic is blocked When the setting is set to All APs in This Subnet traffic...

Страница 31: ...wireless client isolation option As illustrated in the first figure when AP 1 and AP 2 are using the This AP Only option wireless traffic between STA 1 and STA 2 is blocked by AP 1 While wireless traf...

Страница 32: ...y IEEE 802 1x EAP with Dynamic WEP EAP TLS EAP TTLS PEAP The IEEE 802 1x functionality is enabled and dynamic WEP key distribution authentication EAP TLS EAP TTLS or PEAP is used Data encryption is ac...

Страница 33: ...permitted to associate with the AP When the table type is set to exclusive entries in the table are not permitted to associate with the AP With MAC Address Based Access Control users can specify the...

Страница 34: ...granted access to a wireless LAN supporting IEEE 802 1x a user has to issue his or her user name and password or digital certificate to the backend RADIUS server by EAPOL Extensible Authentication Pr...

Страница 35: ...te with the secondary RADIUS server Users can specify the length of timeout and the number of retries before communicating with the secondary RADIUS server after failing to communicate with the primar...

Страница 36: ...iltering capability to be enabled or disabled y Policy for matched packets Indicates how a matched packet is processed discard or pass y To enable a filtering rule Select the check box to the left of...

Страница 37: ...tination Subnet Mask A source destination IP address range is determined by performing an AND operation on the source destination IP address field and the source destination subnet mask field For exam...

Страница 38: ...e UPnP functionality is enabled users can see the AP in My Network Places of Windows XP The AP can be given a friendly name that will be shown in My Network Places Double click on the icon in My Netwo...

Страница 39: ...ADIUS user authentication RADIUS user authentication status changes 3 7 2 3 SNMP The SNMP Simple Network Management Protocol functionality can be disabled and users specify the name used as a password...

Страница 40: ...Enabled Transmission Rate Auto Transmit Power High Security Mode Open System Selected WEP Key Key 1 WEP Key 1 00 00 00 00 00 WEP Key 2 00 00 00 00 00 WEP Key 3 00 00 00 00 00 WEP Key 4 00 00 00 00 00...

Страница 41: ...types of the Ethernet cables are correct Recall that there are two types normal and crossover 4 2 1 Wireless Settings Problems Problem The wireless client computer cannot associate with an AP y Is th...

Страница 42: ...uter Finally this request is forwarded by the gateway to the DNS server on the Internet The DNS reply issued by the DNS server is transmitted back to the client computer following a reverse path When...

Страница 43: ...s of the client computer Make sure the IP address of the client computer and the IP address of the AP are in the same IP subnet Problem The default gateway of the client computer does not respond to p...

Страница 44: ...W z DHCP Server Client DHCP z Static DHCP mappings z Showing current DHCP mappings Operational Mode z AP Bridge WDS z AP Client z Wireless client isolation z AP load balancing z Transmit power control...

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