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Spanning Tree Algorithms (STA) 

 

FX-DS110-APL 

42 

Sample STA Application 

This section describes examples of configurations in which network 
loops occur, and how the application of an STA determines the 
backup path. 

LAN1

LAN2

LAN3

LAN4

LAN5

Priority

10

Priority

30

Priority

40

Priority

20

Priority

50

Port 1
Bridge 1
Port 2

Port 1
Bridge 5
Port 2

Port 1
Bridge 2
Port 2

Port 1
Bridge 4
Port 2

Port 1
Bridge 3
Port 2

 

Figure 6.1.  Sample STA Application 

All settings other than bridge priority settings are identical. 

The root bridge is determined by the priority settings of each 
bridge. 

 

Root bridge 

Bridge 1 

The designated bridge for each LAN segment is determined by 
root path cost. 

 LAN1 

 

Bridge 

1 

 LAN2 

 

Bridge 

1 

 LAN3 

 

Bridge 

2 

 LAN4 

 

Bridge 

3 

 LAN5 

 

Bridge 

5 

Содержание FX-DS110-APL

Страница 1: ...ge without notice All relevant issues have been considered in the preparation of this document Should you notice an omission or any questionable item in this document please feel free to notify CONTEC...

Страница 2: ...feet 4 Floppy disk 1 User s Manual this booklet 1 Installation Guide 1 User s Manual FX DS110 APL Floppy disk x 1 AC Adapter x 1 Installation Guide Tapping screw x 2 Rubber feet x 4 Locking screw x 1...

Страница 3: ...ecautions Related to Service 5 About the Manual 6 2 Overview 2 Overview 2 Overview 2 Overview Component Locations 7 LED Indicators 8 DIP Switches 9 Multi channel Operation 10 3 Operating Mode Descript...

Страница 4: ...ata scramble Functions for Better Security 37 To Use SNMP Agent Functions 37 To Use Spanning Tree 38 To Access the APL from a Different Router 38 6 Spanning Tree Algorithms STA 6 Spanning Tree Algorit...

Страница 5: ...ubleshooting When Communication Fails 51 When SNMP Connections Fail 52 When the APL Will Not Start 53 9 Appendix 9 Appendix 9 Appendix 9 Appendix Product Specifications 55 Input Output Interface 57 UT...

Страница 6: ...ttaching Magnets 18 Figure 4 3 Removing Magnets 18 Figure 4 4 Installation on a Steel Desk 19 Figure 4 5 Cable Connection 20 Figure 4 6 Power Supply Connection 21 Figure 4 7 Ground Connection 22 Figur...

Страница 7: ...able 2 3 Infrastructure Standard Mode Unit Type Station 8 Table 2 4 Other 8 Table 2 5 DIP Switches 9 Table 3 1 Operating Modes and Communications 15 Table 7 1 Group Names 48 Table 9 1 Physical Specifi...

Страница 8: ...FX DS110 APL viii...

Страница 9: ...cations due to lack of a PC card slot or expansion bus slot Of course the FX DS110 APL also operates as an access point allowing the user to configure a small wireless LAN system using the product by...

Страница 10: ...kmanship for up to one year from the date of purchase by the original purchaser Repair will be free of charge only when this device is returned freight prepaid with a copy of the original invoice and...

Страница 11: ...to modify this device The manufacturer will bear no responsibility whatsoever for the device if it has been modified Do not store this device in high temperature or low temperature surroundings or exp...

Страница 12: ...olution Take care to avoid the use of benzene thinners or other volatile solutions which may cause deformation or discoloration Notes The unauthorized reproduction of this document in whole or in part...

Страница 13: ...s of the following chapters Chapter 1 Introduction Chapter 2 Overview Chapter 3 Operating Modes Chapter 4 Placement Chapter 5 Setting Up Chapter 6 Spanning Tree Algorithm Chapter 7 SNMP Agent Function...

Страница 14: ...can cause heat buildup which can lead to damage or failure Figure 2 1 Component Locations LED Indicators The five LED indicators indicate the sending receiving status of the wireless or wired LAN powe...

Страница 15: ...ing Receiving wireless LAN data LINK On Wire LAN link connection normal RX Flashing Receiving wire LAN data POWER Name Status Indicator Table 2 3 Infrastructure Standard Mode Unit Type Station Flashin...

Страница 16: ...s are flashing about 3 seconds then all AP settings will be restored to default values after the next startup If this switch is on the AP can operate without an IP address However the utility software...

Страница 17: ...ons by interference with each other s transmissions Refer to Figure 2 3 when selecting channels to ensure that frequency bands do not overlap The maximum number of channels that can be used simultaneo...

Страница 18: ...nd frequency range for each channel 1 2 3 4 5 6 7 8 9 10 11 12 13 14 2412 2417 2422 2437 2427 2432 2442 2447 2452 2457 2462 2467 2472 2484 Center frequency MHz Channel 14 1 4 3 5 6 2 7 8 9 10 11 12 13...

Страница 19: ...Overview FX DS110 APL 11...

Страница 20: ...ther device in the pair Lines can be duplicated using a spanning tree if bridges are constructed using AP connections Advantages 1 Requires virtually no setup work to start 2 Can bridge multiple wired...

Страница 21: ...RS SI 3 CH AN NE L1 4 CH AN NE L2 5 IN IT AP Unit type AP U User unit FS File server ST Unit type station Wireless connection Wired connection P O W E R W RX W LI NK LIN K RX PO W ER W R X WL INK LI...

Страница 22: ...XLAN products Table 3 1 Operating Modes and Communications FX DS110 APL FX DS110 PCC FX DS110 APE ADHOC ADHOC Simple Mode Simple Mode Infrastructure Infrastructure Standard Mode Standard Mode Brouter...

Страница 23: ...Operating Mode Descriptions FX DS110 APL 15...

Страница 24: ...es in the AP unit fit over the two screws in the wall 3 Slide the AP unit down to hold it in place 1 Press here to open the lid 2 Slide the cover in the direction shown and release the catch Remove th...

Страница 25: ...r surface can cause paint scratching Attaching and Removing Magnets To mount the unit using a magnet push the magnet into the magnet mounting hole in the direction of arrow 1 as shown in Figure 4 2 th...

Страница 26: ...ns The unit can be mounted directly on steel desks or partitions Pull lightly to make sure that the AP does not come off easily For better receiving sensitivity mount the antenna against the steel sur...

Страница 27: ...than 100m in length Use UTP cable having category 3 4 or 5 specifications If using a 10BASE T power supply use a UTP cable with category 5 specifications When connecting with a personal computer NIC...

Страница 28: ...adapter HUB DC UTP DC UTP PC NIC 1 Operates with the separately available cables TP 03 3m TP 05 5m TP 10 10m TP 20 20m TP 50 50m 2 Operates with the separately available TP X 30cm cross cable and att...

Страница 29: ...on Remove the rubber cover from the ground terminal and connect the ground wire using the locking screws included Remove rubber cover Figure 4 7 Ground Connection Note In some installation environment...

Страница 30: ...equire the use of one personal computer Preparing the Utility Software 1 Insert the floppy disk provided in the A drive of the computer 2 Open the Explorer 3 Use Explorer to copy the file APUTIL EXE f...

Страница 31: ...his list is used to detect devices connected by wired or wireless connection Device names are added or deleted using the edit function Configuration Maintains configuration information View or enter s...

Страница 32: ...t key to open the following dialog box You can use the Search key to detect FX DS110 APL devices connected in wired or wireless connections Double click on a detected device to enter the appropriate d...

Страница 33: ...ameter settings including operating mode unit type ESS ID etc as well as SNMP and spanning tree settings The Base tab has settings shared by all operating modes These settings are required The SNMP ta...

Страница 34: ...6 Firmware On the main menu click the Firmware key to open the following dialog box This screen lets you view firmware version information and write firmware Click the Exit key to return to the main m...

Страница 35: ...27 Status On the main menu click the Status key to open the following dialog box This screen lets you view status information about the FX DS110 APL device Click the Exit key to return to the main me...

Страница 36: ...ireless device but if it is used in combination with APE or if the APL is accessed through different routers the IP address must be entered Factory setting A unique value is assigned using the lower 3...

Страница 37: ...unit controls other user units or access points operating in station mode In station mode this unit is controlled by logged in to another AP Factory setting Setting not available DIP switch setting e...

Страница 38: ...to 32 alphabetic characters case sensitive Transmit Rate This setting determines the transmission rate of the sending side of the unit for wireless transmissions If the network mode setting is Infras...

Страница 39: ...y access or Read Write access Factory setting Read Write Send Trap This setting determines whether the SNMP agent system will notify the user of errors such as access right errors or APL startup Facto...

Страница 40: ...igher the priority of this access point in the spanning tree Changing this priority will change the root bridge of all bridges in the network Factory setting 32768 Input values 0 to 65535 BPDU Bridge...

Страница 41: ...30 seconds Path Cost This setting determines the cost allocated to this AP s wired Ethernet port or wireless port The lower the cost allocated to the port the higher the probability that that port wi...

Страница 42: ...w password will only be established for the access point if it is correctly entered twice The new password will be effective when the access point is restarted Input values Up to 6 alphanumeric charac...

Страница 43: ...lso enter any necessary settings on the SNMP and Spanning Tree tabs Note that the spanning tree can only be used when the network mode is ADHOC mode 3 When the settings are complete select Write The s...

Страница 44: ...amble key 3 When the settings are complete select Write The settings will be valid when the device is rebooted To Use SNMP Agent Functions 1 Start the utility software From the main menu select Config...

Страница 45: ...be left at their factory settings 3 When the settings are complete select Write The settings will be valid when the device is rebooted To Access the APL from a Different Router This requires setting...

Страница 46: ...re paths are provided and used it is necessary to switch routes manually The problem can be avoided if the bridge has the following functions Network Loop Detection and Avoidance This function detects...

Страница 47: ...s the designated bridge The designated bridge serves to carry the packages of that LAN segment If more than one bridge is connected to the same LAN segment and the root path costs are exactly the same...

Страница 48: ...ts existence This parameter may not exceed the Max Age Time Forward Delay Time Set in the range 4 to 30 seconds When the ports of a bridge change from blocking to forwarding status this determines the...

Страница 49: ...signated Port The port on the designated bridge connected to the LAN segment is called the designated port On the bridge packages are only transferred on the port that is the root port and other ports...

Страница 50: ...riority 20 Priority 50 Port 1 Bridge 1 Port 2 Port 1 Bridge 5 Port 2 Port 1 Bridge 2 Port 2 Port 1 Bridge 4 Port 2 Port 1 Bridge 3 Port 2 Figure 6 1 Sample STA Application All settings other than brid...

Страница 51: ...to the root bridge Bridge 2 Port 1 Bridge 3 Port 1 Bridge 4 Port 1 Bridge 5 Port 1 Ports that are neither designated ports nor root ports are backup paths Backup path Bridge 4 port 2 After applicatio...

Страница 52: ...lied again to reconfigure the network topology The reconfigured network would then look like this LAN1 LAN2 LAN3 LAN4 LAN5 Port 1 Bridge 1 Port 2 Port 1 Bridge 5 Port 2 Port 1 Bridge 2 Port 2 Port 1 B...

Страница 53: ...Spanning Tree Algorithms STA FX DS110 APL 45...

Страница 54: ...and controls all network devices that have SNMP agent functions SNMPc can be used to perform the following control functions Monitoring unit startup status Monitoring port operating status Indicating...

Страница 55: ...Information related to UDP protocol including UDP message TX RX count etc snmp Information related to SNMP including SNMP message count etc dot1dBase Information related to bridge including MAC addres...

Страница 56: ...the PC on which SNMPc is installed as a network manager analyzing network status and error information from this device as shown below Also you can install the maintenance tools provided with this pr...

Страница 57: ...drive is the A drive enter A SNMPc 4 3 Select CONTEC FX DS110 APL and click OK to start installation 4 When the following message appears click No to exit the program Do you want to install additiona...

Страница 58: ...each type of operation Check that the settings are appropriate for the type of operation and check the format in which communication is being attempted Also check DIP switch settings The terminals th...

Страница 59: ...es communication is hindered by attenuation of electric waves Attenuation occurs naturally as distance from the source of transmission increases but may also be caused by objects in the path of the tr...

Страница 60: ...sure it is correctly plugged into an outlet and that the power supply type agrees with the power supply switch setting Check whether the power LED is flashing If the power LED is still flashing more...

Страница 61: ...Troubleshooting FX DS110 APL 53...

Страница 62: ...ailable Antenna Flat surface diversity antenna Operating modes Ad hoc Infrastructure Station settings available Dimensions mm 81 W x 26 5 D x 175 H Weight 0 2kg Specification FX DS110 APL Table 9 2 So...

Страница 63: ...Appendix FX DS110 APL 55 DC UTP UTP POWER WRX WLINK LINK RX 81 175 26 5 mm Figure 9 1 External Dimensions...

Страница 64: ...TP Port Pin Assignments Table 9 4 UTP Port Pin Assignments Pin no Signal 1 TD 2 TD _ 3 RD 4 Not used VCC 1 5 Not used GND 1 6 RD_ 7 Not used VCC 1 8 Not used GND 1 1 These pin assignments are used whe...

Страница 65: ...nctions Get acquire Set modify and Trap notify event Conceived as an easily installable control protocol that places as little load on the network as possible Diversity A method of using multiple ante...

Страница 66: ...lation in which the diffusion is by means of phase modulation using a broad band diffusion signal pseudo random strings CSMA CA Carrier Sense Multiple Access with Collision Avoidance CSMA is a method...

Страница 67: ...0 series access points serve as the bridge between wired networks and wireless networks as well as providing bridge functions between segments and IP tunnel functions indispensable to the building of...

Страница 68: ...Index FX DS110 APL 60 10 Index C Component Locations 7 F Features 1 H Handling Precautions 3 I Introduction 1 L Liability 3 O Obtain Service 3 Overview 7 S Setup 17 W Warranty 2...

Страница 69: ...A 46 500 LZV6181 010509...

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