LevelOne FGP-2472 User manual

FGP-2472
24 FE PoE + 2 GE Combo SFP L2 Managed Switch
User Manual
V1.0 – 101014

Table of Contents
CAUTION............................................................................................................................................ IV
ELECTRONIC EMISSION NOTICES ....................................................................................................... IV
1. INTRODUCTION........................................................................................................................2
1-1. OVERVIEW OF FGP-2472..............................................................................................................2
1-2. CHECKLIST ...................................................................................................................................5
1-3. FEATURES .....................................................................................................................................5
1-4. VIEW OF FGP-2472.......................................................................................................................7
1-4-1. User Interfaces on the Front Panel (Button, LEDs and Plugs) ...........................................7
1-4-2. User Interfaces on the Rear Panel.......................................................................................9
1-5. VIEW OF THE OPTIONAL MODULES...............................................................................................9
2. INSTALLATION........................................................................................................................10
2-1. STARTING FGP-2472 UP.............................................................................................................10
2-1-1. Hardware and Cable Installation ......................................................................................10
2-1-2. Installing Chassis to a 19-Inch Wiring Closet Rail............................................................12
2-1-3. Cabling Requirements........................................................................................................12
2-1-3-1. Cabling Requirements for TP Ports........................................................................................... 12
2-1-3-2. Cabling Requirements for 1000SX/LX SFP Module................................................................. 12
2-1-3-3. Switch Cascading in Topology.................................................................................................. 13
2-1-4. Configuring the Management Agent of FGP-2472............................................................16
2-1-4-1. Configuring the Management Agent of FGP-2472 through the Serial RS-232 Port.................. 16
2-1-4-2. Configuring the Management Agent of FGP-2472 through the Ethernet Port........................... 18
2-1-5. IP Address Assignment.......................................................................................................19
2-2. TYPICALAPPLICATIONS ..............................................................................................................24
3. OPERATION OF WEB-BASED MANAGEMENT...............................................................26
3-1. WEB MANAGEMENT HOME OVERVIEW.......................................................................................28
3-1-1. System Information............................................................................................................31
3-1-2. IP Configuration................................................................................................................33
3-1-3. Time Configuration............................................................................................................36
3-1-4. Account Configuration.......................................................................................................39
3-1-5. Management Security ........................................................................................................40
3-1-6. Virtual Stack.......................................................................................................................43
3-1-7. Login Protect .....................................................................................................................45
3-2. PORT CONFIGURATION................................................................................................................46
3-2-1.Port Status ..........................................................................................................................47
3-2-2. Port Configuration.............................................................................................................51
3-2-3. Port Description ................................................................................................................53
3-2-4. Simple Counter ..................................................................................................................54
3-2-4. Detail Counter...................................................................................................................55
3-3. POE.............................................................................................................................................58
3-4. LOOP DETECTION........................................................................................................................62
3-5. SNMP CONFIGURATION..............................................................................................................63
3-6. DHCP BOOT...............................................................................................................................65
3-7. IGMP SNOOPING ........................................................................................................................66
3-8. VLAN ........................................................................................................................................75
3-8-1. VLAN Mode .......................................................................................................................75
3-8-2. Tag-based Group................................................................................................................78
3-8-3. PVID..................................................................................................................................80
3-8-4. Port-based Group ..............................................................................................................82

3-8-5. Management VLAN............................................................................................................84
3-9. MAC TABLE ...............................................................................................................................85
3-10. GVRPCONFIGURATION............................................................................................................91
3-11. STPCONFIGURATION................................................................................................................97
3-11-1. STP Status........................................................................................................................97
3-10-2. STP Configuration...........................................................................................................99
3-10-3. STP Port Configuration.................................................................................................101
3-12. MSTPCONFIGURATION ..........................................................................................................104
3-12-1 Status ..............................................................................................................................104
3-12-2 Region Config.................................................................................................................105
3-12-3 Instance View..................................................................................................................106
3-13.TRUNKING CONFIGURATION ...................................................................................................114
3-14. 802.1X CONFIGURATION .........................................................................................................120
3-15.ALARM CONFIGURATION.........................................................................................................131
3-16. CONFIGURATION .....................................................................................................................133
3-14-1. Save/Restore...................................................................................................................134
3-14-2. Config File.....................................................................................................................137
3-17. SECURITY ...............................................................................................................................138
3-18. BANDWIDTH MANAGEMENT...................................................................................................140
3-19. QOS(QUALITY OF SERVICE)CONFIGURATION........................................................................143
3-20. DIAGNOSTICS..........................................................................................................................153
3-21.TFTPSERVER .........................................................................................................................156
3-22. LOG ........................................................................................................................................157
3-23. FIRMWARE UPGRADE..............................................................................................................158
3-24. REBOOT ..................................................................................................................................159
3-25. LOGOUT..................................................................................................................................160
4. OPERATION OF CLI MANAGEMENT...............................................................................161
4-1. CLI MANAGEMENT...................................................................................................................161
4-1-1. Login................................................................................................................................161
4-2. COMMANDS OF CLI ..................................................................................................................163
4-2-1. Global Commands of CLI................................................................................................164
4-2-2. Local Commands of CLI..................................................................................................170
5. MAINTENANCE..........................................................................................................................256
5-1. RESOLVING NO LINK CONDITION .............................................................................................256
5-2. Q&A.........................................................................................................................................256
APPENDIXA TECHNICAL SPECIFICATIONS.........................................................................257
APPENDIX B NULL MODEM CABLE SPECIFICATIONS......................................................260

Caution
Circuit devices are sensitive to static electricity, which can damage their delicate
electronics. Dry weather conditions or walking across a carpeted floor may cause you to
acquire a static electrical charge.
To protect your device, always:
•Touch the metal chassis of your computer to ground the static electrical charge before
you pick up the circuit device.
•Pick up the device by holding it on the left and right edges only.
•The switch supports the SFP Vendor includes: LevelOne, Agilent, Avago and Finisa
•If you need using outdoor device connect to this device with cable then you need to
addition an arrester on the cable between outdoor device and this device.
Fig. Addition an arrester between outdoor device and this switch
Electronic Emission Notices
Federal Communications Commission (FCC) Statement
This equipment has been tested and found to comply with the limits for a class A
computing device pursuant to Subpart J of part 15 of FCC Rules, which are designed to
provide reasonable protection against such interference when operated in a commercial
environment.
European Community (CE) Electromagnetic Compatibility Directive
This equipment has been tested and found to comply with the protection requirements
of European Emission Standard EN55022/EN61000-3 and the Generic European Immunity
Standard EN55024.
EMC:
EN55022(2006)/CISPR-22( 2006) class A
IEC61000-4-2 (2001) 4K V CD, 8KV, AD
IEC61000-4-3 (2002) 3V/m Level 2
IEC61000-4-4 (2004) 1KV – (power line), 0.5KV – (signal line)
IEC61000-4-5 (2001) Line to Line: 1KV, Line to Earth: 2KV
IEC61000-4-6 (2003) 130dBuV(3V) Level 2
IEC61000-4-8 (2001) 1A/m
IEC61000-4-11 (2001)
Voltage dips:
>95%, 0.5period, 30%, 25periods
Voltage interruptions:
>95%, 250periods

v
Warrning:
•Self-demolition on Product is strictly prohibited. Damage caused by self-demolition will be
charged for repairing fees.
•Do not place product at outdoor or sandstorm.
•Before installation, please make sure input power supply and product specifications are
compatible to each other.
•Before importing / exporting configuration please make sure the firmware version is
always the same.
• After firmware upgrade, the switch will remove the configuration automatically to latest
firmware version.

1
About this user’s manual
In this user’s manual, it will not only tell you how to install and connect your
network system but configure and monitor the FGP-2472 through the built-in CLI
and web by RS-232 serial interface and Ethernet ports step-by-step. Many
explanation in detail of hardware and software functions are shown as well as the
examples of the operation for web-based interface and command-line interface
(CLI).
Overview of this user’s manual
Chapter 1 “Introduction” describes the features of FGP-2472
Chapter 2 “Installation”
Chapter 3 “Operation of Web-based Management”
Chapter 4 “Operation of CLI Management”
Chapter 5 “Maintenance”

2
1. Introduction
1-1. Overview of FGP-2472
FGP-2472, a 24 Fast Ethernet + 2 Gigabit L2 Managed Switch, implemented
24 10/100Mbps TP + 2 Gigabit dual media ports with TP/SFP, is a standard switch
that meets all IEEE 802.3/u/x/z Gigabit, Fast Ethernet and Ethernet specifications.
The switch can be managed through RS-232 serial port via directly connection, or
through Ethernet port using Telnet or Web-based management unit, associated with
SNMP agent. With the SNMP agent, the network administrator can logon the switch
to monitor, configure and control each port’s activity in a friendly way. The overall
network management is enhanced and the network efficiency is also improved to
accommodate high bandwidth applications. In addition, the switch features
comprehensive and useful function such as QoS (Quality of Service), Spanning
Tree, VLAN, Port Trunking, Bandwidth Control, Port Security, SNMP/RMON and
IGMP Snooping capability via the intelligent software. It is suitable for both metro-
LAN and office application.
This PSE switch also complies with IEEE 802.3af, its advanced auto-sensing
algorithm enables providing power devices (PD) discovery, classification, current
limit, and other necessary functions. It also supports high safety with short circuit
protection and power-out auto-detection to PD.
10/100/1000Mbps TP is a standard Ethernet port that meets all IEEE
802.3/u/x/z Gigabit, Fast Ethernet specifications. 1000Mbps SFP Fiber transceiver
is a Gigabit Ethernet port that fully complies with all IEEE 802.3z and 1000Base-
SX/LX standards.
1000Mbps Single Fiber WDM (BiDi) transceiver is designed with an optic
Wavelength Division Multiplexing (WDM) technology that transports bi-directional
full duplex signal over a single fiber simultaneously.
For upgrading firmware, please refer to the Section 3-21 or Section 4-2-2 for
more details. The switch will not stop operating while upgrading firmware and after
that, the configuration keeps unchanged.

3
•
••
• Key Features in the Device
QoS:
Support Quality of Service by the IEEE 802.1P standard. There are two
priority queue and packet transmission schedule using Weighted Round
Robin (WRR). User-defined weight classification of packet priority can be
based on either VLAN tag on packets or user-defined port priority.
Spanning Tree:
Support IEEE 802.1D, IEEE 802.1w (RSTP: Rapid Spanning Tree
Protocol) standards.
VLAN:
Support Port-based VLAN and IEEE802.1Q Tag VLAN. Support 256 active
VLANs and VLAN ID 1~4094.
Port Trunking:
Support static port trunking and port trunking with IEEE 802.3ad LACP.
Bandwidth Control:
Support ingress and egress per port bandwidth control.
Port Security:
Support allowed, denied forwarding and port security with MAC address.
SNMP/RMON:
SNMP agent and RMON MIB. In the device, SNMP agent is a client
software which is operating over SNMP protocol used to receive the
command from SNMP manager (server site) and echo the corresponded
data, i.e. MIB object. Besides, SNMP agent will actively issue TRAP
information when happened.
RMON is the abbreviation of Remote Network Monitoring and is a branch of
the SNMP MIB.
The device supports MIB-2 (RFC 1213), Bridge MIB (RFC 1493), RMON
MIB (RFC 1757)-statistics Group 1,2,3,9, Ethernet-like MIB (RFC 1643),
Ethernet MIB (RFC 1643) and so on.
IGMP Snooping:
Support IGMP version 2 (RFC 2236): The function IGMP snooping is used
to establish the multicast groups to forward the multicast packet to the
member ports, and, in nature, avoid wasting the bandwidth while IP
multicast packets are running over the network.
IGMP Proxy:
The implementation of IP multicast processing. The switch supports IGMP
version 1 and IGMP version 2, efficient use of network bandwidth, and fast
response time for channel changing. IGMP version 1 (IGMPv1) is
described in RFC1112 ,and IGMP version 2 (IGMPv2) is described in RFC
2236. Hosts interact with the system through the exchange of IGMP
messages. Similarly, when you configure IGMP proxy, the system interacts
with the router on its upstream interface through the exchange of IGMP
messages. However, when acting as the proxy, the system performs the
host portion of the IGMP task on the upstream interface as follows:

4
•When queried, sends group membership reports to the group.
•When one of its hosts joins a multicast address group to which
none of its other hosts belong, sends unsolicited group
membership reports to that group.
•When the last of its hosts in a particular multicast group leaves
the group, sends an unsolicited leave group membership report
to the all-routers group (244.0.0.2).
PoE:
24-PoE ports allow power to be supplied to end devices, such as Wireless
Access Points or VoIP Phones, directly through the existing LAN cables,
eliminating costs for additional AC wiring and reducing Installation Cost.

5
1-2. Checklist
Before you start installing the switch, verify that the package contains the
following:
A set of FGP-2472
Modules (optional)
Mounting Accessory (for 19” Rack Shelf)
This User's Manual in CD-ROM
AC Power Cord
RS-232 Cable
Please notify your sales representative immediately if any of the aforementioned
items is missing or damaged.
1-3. Features
The FGP-2472, a standalone off-the-shelf switch, provides the
comprehensive features listed below for users to perform system network
administration and efficiently and securely serve your network.
•
••
• Hardware
• Supports 24-port 10/100M TP ports with Nway and auto MDIX function
• In FGP-2472, it supports 2 Gigabit dual media ports(TP/SFP) and 2 slots for
removable SFP module supporting 1000M SFP fiber module with 380W Power
Supply
•Supports 256KB packet buffer and 128KB control memory
• Maximal packet length can be up to 1536 bytes
•Supports 8K MAC table
•Supports Switch capacity up to 8.8Gbps
•Supports throughput up to 6.547Mpps
•Full-duplex flow control (IEEE802.3x) and half-duplex backpressure
• Extensive front-panel diagnostic LEDs; System: Power, CPURUN, ACT / FDX /
SPD(LEDSET), 10/100Mbps TP Port1-24:LINK/ACT, FDX, SPD,
10/100/1000Mbps/Fiber port 25,26: LINK/ACT, FDX, SPD
24 port IEEE802.3af PoE PSE.
FGP-2472 supports up to 24-port 15.4W
Endpoint with 48VDC power through RJ-45 pin 1, 2, 3, 6.
Powered Device(PD) auto detection and classification.
PoE-PSE status and activity LED indicator.

6
•
••
• Management
•Supports concisely the status of port and easily port configuration
•Supports per port traffic monitoring counters
• Supports a snapshot of the system Information when you login
• Supports port mirror function
• Supports the static trunk function
• Supports 802.1Q VLAN with 256 entries.
• Supports user management and limits three users to login
• Supports DHCP Broadcasting Suppression to avoid network suspended or
crashed
• Supports to send the trap event while monitored events happened
•Supports default configuration which can be restored to overwrite the current
configuration which is working on via web browser and CLI
• Supports on-line plug/unplug SFP modules
• Supports 5 kinds of QoS, are as follows, MAC Priority, 802.1p Priority, IP TOS
Priority, and DiffServ DSCP Priority.
• Built-in web-based management and CLI management, providing a more
convenient UI for the user
• Supports port mirror function with ingress/egress traffic
•Supports rapid spanning tree (802.1w RSTP)
• Supports 802.1x port security on a VLAN
• Supports user management and only first login administrator can configure the
device. The rest of users can only view the switch
• SNMP access can be disabled and prevent from illegal SNMP access
• Supports Ingress, Non-unicast and Egress Bandwidth rating management
• The trap event and alarm message can be transferred via e-mail and mobile
phone short message
• Supports diagnostics to let administrator knowing the hardware status
•Supports external loopback test to check if the link is ok
• TFTP for firmware upgrade, system log upload and config file import/export
• Supports remote boot the device through user interface and SNMP
• Supports network time synchronization and daylight saving
• Supports 120 event log records in the main memory and display on the local
console

7
1-4. View of FGP-2472
1-4-1. User Interfaces on the Front Panel (Button, LEDs and Plugs)
There are 24 TP Fast Ethernet ports and 2 slots for optional removable
modules on the front panel of the switch. LED display area, locating on the front
panel, contains a CPURUN, Power LED and 26 ports working status of the switch.
Fig. 1-1 Full View of the FGP-2472
Fig. 1-2 Front View of the FGP-2472
Power Indication LED
Fast
Ethernet Port
LED SET Mode: ACT/FDX/SPD
Gigabit Dual Media
Port(25~26): SFP/TP
LEDSET Button
LEDSET button is
used to change
the LED display
mode
PoE Port Status
Indication LEDs
Fiber Port Status Indication LED
s
TP Port Status
Indication LEDs
RESET B
utton
:
RESET button is used to
reset the management
system.

8
•
••
• LED Indicators
LED Color Function
System LED
CPURUN Green Lit when CPU is on and good
POWER Green Lit when AC power is on and good
ACT Green Lit when LEDSET set on active mode
FDX Green Lit when LEDSET set on full-duplex mode
SPD Green Lit when LEDSET set on speed mode
10/100Mbps Ethernet TP Port 1 to 24 LED
LINK Green Lit when connection with remote device is good
Off when cable connection is not good
ACT/FDX/ SPD
Amber
(TP Port 1
to 24 LED)
a. LEDSET set on ACT (active) mode:
Blinks when any traffic is present
b. LEDSET set on FDX (full-duplex) mode:
Lit when full-duplex mode is active
Blinks when any collision is present
c. LEDSET set on SPD (speed) mode:
Lit when 100Mbps speed is active
Off when 10Mbps speed is active
PoE-PSE ACT Green Lit when PoE Power is active
Off when PoE function is Off
10/100/1000Mbps Gigabit TP/Fiber Port 25, 26 LED
LINK Green Lit when connection with remote device is good
Off when cable connection is not good
FX Green Lit when Fiber port is active
Off when TP port is active
ACT/FDX/ SPD
Green
(Port 25,
26 LED)
a. LEDSET set on ACT (active) mode:
Blinks when any traffic is present
b. LEDSET set on FDX (full-duplex) mode:
Lit when full-duplex mode is active
Blinks when any collision is present
c. LEDSET set on SPD (speed) mode:
Lit when 1000Mbps speed is active
Off when 10/100Mbps speed is active
Table1-1

1-4-2.
User Interfaces on the Rear P
One RS-232 DB-
9 interface is offered for configuration or management. And
there is one AC power input socket
for having the switch powered on or off.
1-5. View of the Optio
nal Modules
In the switch, Port 25, 26
includes two types of media
(LC, BiDi LC…); this port supports 10/100/1000Mbps TP or 1000Mbps SFP Fiber
with auto-
detected function. 1000Mbps SFP Fiber
speed connection expansion;
the following are
switch:
1000Mbps LC, MM, SFP Fiber
transceiver

1000Mbps LC, SM 10km, SFP Fiber

1000Mbps LC, SM 30km, SFP Fiber

1000Mbps LC, SM 50km, SFP Fiber
1000Mbps BiDi L
C, type 1, SM 20km, SFP Fiber
1000Mbps BiDi L
C, type 2, SM 20km, SFP Fiber

1000Mbps LC, SM 10km, SFP Fiber
Fig. 1-
3 Rear View of the
RS
-
232 DB
-
9 Connector
Fig. 1-4 Front View of 1000
Base
Fig. 1-5 Front View of
1000Base
9
User Interfaces on the Rear P
anel
9 interface is offered for configuration or management. And
for having the switch powered on or off.
nal Modules
includes two types of media
--- TP and SFP Fiber
(LC, BiDi LC…); this port supports 10/100/1000Mbps TP or 1000Mbps SFP Fiber
detected function. 1000Mbps SFP Fiber
transceiver is used for high-
the following are
optional SFP types provided for the
transceiver
1000Mbps LC, SM 10km, SFP Fiber
transceiver
1000Mbps LC, SM 30km, SFP Fiber
transceiver
1000Mbps LC, SM 50km, SFP Fiber
transceiver
C, type 1, SM 20km, SFP Fiber
WDM transceiver
C, type 2, SM 20km, SFP Fiber
WDM transceiver
1000Mbps LC, SM 10km, SFP Fiber
transceiver with DDM
3 Rear View of the
FGP-2472
AC Line 100
-
240V 50/60 Hz
Base
-SX/LX LC, SFP Fiber Transceiver
1000Base
-LX BiDi LC, SFP Fiber Transceiver

10
2. Installation
2-1. Starting FGP-2472 Up
This section will give users a quick start for:
- Hardware and Cable Installation
- Management Station Installation
- Software booting and configuration
2-1-1. Hardware and Cable Installation
At the beginning, please do first:
⇒Wear a grounding device to avoid the damage from electrostatic discharge
•
••
• Installing Optional SFP Fiber Transceivers to the FGP-2472 Switch
Note: If you have no modules, please skip this section.
•
••
•Connecting the SFP Module to the Chassis:
The optional SFP modules are hot swappable, so you can plug or unplug it
before or after powering on.
1. Verify that the SFP module is the right model and conforms to the
chassis
2. Slide the module along the slot. Also be sure that the module is properly
seated against the slot socket/connector
3. Install the media cable for network connection
4. Repeat the above steps, as needed, for each module to be installed into
slot(s)
5. Have the power ON after the above procedures are done
Fig. 2
-
1
Installation of
O
ptional
SFP
Fiber
T
ransceiver

11
•
TP Port and Cable Installation
⇒In the switch, TP port supports MDI/MDI-X auto-crossover, so both types of
cable, straight-through (Cable pin-outs for RJ-45 jack 1, 2, 3, 6 to 1, 2, 3, 6 in
10/100M TP; 1, 2, 3, 4, 5, 6, 7, 8 to 1, 2, 3, 4, 5, 6, 7, 8 in Gigabit TP) and
crossed-over (Cable pin-outs for RJ-45 jack 1, 2, 3, 6 to 3, 6, 1, 2) can be used.
It means you do not have to tell from them, just plug it.
⇒Use Cat. 5 grade RJ-45 TP cable to connect to a TP port of the switch and the
other end is connected to a network-aware device such as a workstation or a
server.
⇒Repeat the above steps, as needed, for each RJ-45 port to be connected to a
Gigabit 10/100/1000 TP device.
Now, you can start having the switch in operation.
•
••
• Power On
The switch supports 100-240 VAC, 50-60 Hz power supply. The power
supply will automatically convert the local AC power source to DC power. It does not
matter whether any connection plugged into the switch or not when power on, even
modules as well. After the power is on, all LED indicators will light up immediately
and then all off except the power LED still keeps on. This represents a reset of the
system.
•
••
• Firmware Loading
After resetting, the bootloader will load the firmware into the memory. It will
take about 30 seconds, after that, the switch will flash all the LED once and
automatically performs self-test and is in ready state.

12
2-1-2. Installing Chassis to a 19-Inch Wiring Closet Rail
Caution: Allow a proper spacing and proper air ventilation for the cooling fan
at both sides of the chassis.
⇒Wear a grounding device for electrostatic discharge.
⇒Screw the mounting accessory to the front side of the switch (See Fig. 2-2).
⇒Place the Chassis into the 19-inch wiring closet rail and locate it at the proper
position. Then, fix the Chassis by screwing it.
2-1-3. Cabling Requirements
To help ensure a successful installation and keep the network performance
good, please take a care on the cabling requirement. Cables with worse
specification will render the LAN to work poorly.
2-1-3-1. Cabling Requirements for TP Ports
⇒For Fast Ethernet TP network connection
The grade of the cable must be Cat. 5 or Cat. 5e with a maximum length of
100 meters.
⇒Gigabit Ethernet TP network connection
The grade of the cable must be Cat. 5 or Cat. 5e with a maximum length of
100 meters. Cat. 5e is recommended.
2-1-3-2. Cabling Requirements for 1000SX/LX SFP Module
It is more complex and comprehensive contrast to TP cabling in the fiber
media. Basically, there are two categories of fiber, multi mode (MM) and single
mode (SM). The later is categorized into several classes by the distance it supports.
They are SX, LX, LHX, XD, and ZX. From the viewpoint of connector type, there
mainly are LC and BiDi-SC.
Gigabit Fiber with multi-mode LC SFP module
Gigabit Fiber with single-mode LC SFP module
Gigabit Fiber with BiDi-SC 1310nm SFP module
Fig. 2-2

13
Gigabit Fiber with BiDi-SC 1550nm SFP module
The following table lists the types of fiber that we support and those else not
listed here are available upon request.
IEEE 802.3z
Gigabit Ethernet
1000SX 850nm
Multi-mode Fiber Cable and Modal Bandwidth
Multi-mode 62.5/125µm Multi-mode 50/125µm
Modal
Bandwidth Distance Modal Bandwidth Distance
160MHz-Km 220m 400MHz-Km 500m
200MHz-Km 275m 500MHz-Km 550m
1000Base-
LX/LHX/XD/ZX
SFP.0LC.212.10/30/50/70/B0 Km
Single-mode Fiber 9/125µm
Single-mode transceiver 1310nm 10Km
Single-mode transceiver 1550nm 30, 50, 70, 110Km
1000Base-LX
Single Fiber
WDM Module
SFP.0BL.621.202 Single-Mode
*20Km TX(Transmit) 1310nm
RX(Receive) 1550nm
SFP.0BL.621.201 Single-Mode
*20Km TX(Transmit) 1550nm
RX(Receive) 1310nm
Table2-1
2-1-3-3. Switch Cascading in Topology
•
••
• Takes the Delay Time into Account
Theoretically, the switch partitions the collision domain for each port in switch
cascading that you may up-link the switches unlimitedly. In practice, the network
extension (cascading levels & overall diameter) must follow the constraint of the
IEEE 802.3/802.3u/802.3z and other 802.1 series protocol specifications, in which
the limitations are the timing requirement from physical signals defined by 802.3
series specification of Media Access Control (MAC) and PHY, and timer from some
OSI layer 2 protocols such as 802.1d, 802.1q, LACP and so on.
The fiber, TP cables and devices’ bit-time delay (round trip) are as follows:
1000Base-X TP, Fiber 100Base-TX TP 100Base-FX Fiber
Round trip Delay: 4096 Round trip Delay: 512
Cat. 5 TP Wire: 11.12/m Cat. 5 TP Wire: 1.12/m Fiber Cable: 1.0/m
Fiber Cable : 10.10/m TP to fiber Converter: 56
Bit Time unit : 1ns (1sec./1000 Mega bit)
Bit Time unit: 0.01µs (1sec./100 Mega bit)
Table 2-2
Sum up all elements’ bit-time delay and the overall bit-time delay of
wires/devices must be within Round Trip Delay (bit times) in a half-duplex network
segment (collision domain). For full-duplex operation, this will not be applied. You
may use the TP-Fiber module to extend the TP node distance over fiber optic and
provide the long haul connection.

•
••
•
Typical Network Topology in Deployment
A hierarchical network with minimum levels of switch may reduce the timing
delay between server and client station. Basically, with this approach, it will
minimize the number of swit
ches in any one path; will lower the possibility of
network loop and will improve network efficiency. If more than two switches are
connected in the same network
, select one switch as Level 1 switch and connect all
other switches to it at Level 2. Server/H
ost is recommended to connect to the Level
1 switch
. This is general if no VLAN or other
Case1: All switch ports are in the same local area network. Every port can access
each other (See Fig. 2-3).
If VLAN
is enabled and configured
communicate each other directly
is bounded
Here VLAN area is defined by what VLAN you are using. The switch
supports both port-
based VLAN and tag
deployment, especially in physical location. The following diagram shows how it
works and what the difference they are.
Case2a: Port-based VLAN (See Fig.2-
4).
Fig. 2
-
3
No VLAN Configuration Diagram
Fig. 2-
4 Port
14
Typical Network Topology in Deployment
A hierarchical network with minimum levels of switch may reduce the timing
delay between server and client station. Basically, with this approach, it will
ches in any one path; will lower the possibility of
network loop and will improve network efficiency. If more than two switches are
, select one switch as Level 1 switch and connect all
ost is recommended to connect to the Level
. This is general if no VLAN or other
special requirements are applied.
Case1: All switch ports are in the same local area network. Every port can access
is enabled and configured
, each node in the network that can
is bounded
in the same VLAN area.
Here VLAN area is defined by what VLAN you are using. The switch
based VLAN and tag
-based VLAN. They are different in practical
deployment, especially in physical location. The following diagram shows how it
4).
No VLAN Configuration Diagram
4 Port
-based VLAN Diagram