D-Link DXS-3250E - xStack Switch User manual

Web/Installation Guide
ProductModel: TM DXS/DWS-3200 Series
Layer2+StackableGigabit EthernetSwitcheswithoptional XG Uplinks
Release3.0
©Copyright 2007. All rights reserved.

Table of Contents
Page 1
Table of Contents
DXS-3227, DXS-3227P, DXS-3250 and DXS-3250E User Guide Overview ..................................8
Intended Audience........................................................................................................................... 9
Device Description ................................................................................................................ 10
Viewing the Device ........................................................................................................................ 10
DXS-3250 Front Panel.............................................................................................................................11
DXS-3250E Front Panel ..........................................................................................................................11
DXS-3227 Front Panel.............................................................................................................................12
DXS-3227P Front Panel ..........................................................................................................................13
Back Panels.............................................................................................................................................14
Ports Description ...........................................................................................................................15
1000Base-T Gigabit Ethernet Ports.........................................................................................................15
SFP Port ..................................................................................................................................................15
XFP Port ..................................................................................................................................................16
CX- 4 Port ................................................................................................................................................17
Stacking Ports..........................................................................................................................................17
RS-232 Console Port...............................................................................................................................17
Cable Specifications ......................................................................................................................18
LED Definitions..............................................................................................................................19
Port LEDs ................................................................................................................................................19
System LEDs ...........................................................................................................................................22
Cable, Port, and Pinout Information ..............................................................................................23
Pin Connections for the 10/100/1000 Ethernet Interface.........................................................................23
Ports Pinout .............................................................................................................................................24
Physical Dimensions .....................................................................................................................25
Mounting Device ................................................................................................................... 26
Preparing for Installation................................................................................................................26
Installation Precautions............................................................................................................................26
Site Requirements ...................................................................................................................................27
Unpacking................................................................................................................................................27
Installing the Device ......................................................................................................................28
Desktop or Shelf Installation ....................................................................................................................28
Rack Installation ......................................................................................................................................29
Connecting the Device ..................................................................................................................31
Connecting the Switch to a Terminal.......................................................................................................31
AC Power Connection .............................................................................................................................31
Initial Configuration ............................................................................................................... 32
General Configuration Information...........................................................................................................32
Booting the Switch ...................................................................................................................................33
Configuration Overview ...........................................................................................................................36
Advanced Configuration ..........................................................................................................................39
Software Download and Reboot..............................................................................................................43

DXS-3227, DXS-3227P, DXS-3250 and DXS-3250E EWS User Guide
Page 2
Startup Menu Functions.......................................................................................................................... 45
Getting Started...................................................................................................................... 48
Starting the D-Link Embedded Web Interface............................................................................... 49
Understanding the D-Link Embedded Web Interface.................................................................... 51
Device Representation............................................................................................................................ 52
Using the D-Link Embedded Web Interface Management Buttons ........................................................ 53
Using Screen and Table Options ..................................................................................................54
Adding Configuration Information ........................................................................................................... 54
Modifying Configuration Information ....................................................................................................... 55
Deleting Configuration Information ......................................................................................................... 55
Rebooting the Device.................................................................................................................... 56
Logging Off from the Device ......................................................................................................... 57
Managing Device Information ............................................................................................... 58
Defining the System Description ................................................................................................... 59
Enabling Jumbo Frames ............................................................................................................... 61
Rebooting the Device.................................................................................................................... 62
Managing Power over Ethernet Devices............................................................................... 63
Defining PoE System Information .................................................................................................64
Defining PoE Interfaces ................................................................................................................ 66
Stacking ................................................................................................................................ 69
Configuring Device Security.................................................................................................. 74
Configuring Management Security................................................................................................ 75
Configuring Authentication Methods....................................................................................................... 75
Configuring Passwords ........................................................................................................................... 96
Configuring DHCP Snooping ................................................................................................................ 102
Defining DHCP Snooping Properties .................................................................................................... 103
Defining DHCP Snooping on VLANs .................................................................................................... 105
Defining Trusted Interfaces................................................................................................................... 106
Adding Interfaces to the DHCP Snooping Database ............................................................................ 108
Configuring DHCP Option 82................................................................................................................ 110
Configuring ARP Inspection.................................................................................................................. 111
ARP Inspection Properties.................................................................................................................... 112
Defining Trusted Interfaces .................................................................................................................. 113
Defining the ARP Inspection List................................................................................................. 115
Assigning ARP Inspection VLAN Settings ............................................................................................ 117
Configuring IP Source Guard................................................................................................................ 119
Configuring Network Security...................................................................................................... 125
Network Security Overview................................................................................................................... 126
Defining Network Authentication Properties ......................................................................................... 127
Defining Port Authentication ................................................................................................................. 129
Configuring Multiple Hosts .................................................................................................................... 132
Configuring Traffic Control.................................................................................................................... 136
Defining DOS Protection Security ............................................................................................... 142

Table of Contents
Page 3
Defining DoS Prevention .......................................................................................................................142
Defining Martian Address Filtering.........................................................................................................144
Enabling SYN Filtering...........................................................................................................................146
Defining SYN Rate Protection ...............................................................................................................148
Discarding IP Fragments .......................................................................................................................150
Enabling ICMP Filtering .........................................................................................................................152
Defining ACLs.............................................................................................................................. 154
Defining ACL Binding.............................................................................................................................154
Defining IP Based ACLs ........................................................................................................................156
Defining MAC Based ACL .....................................................................................................................161
Configuring Ports ................................................................................................................ 164
Configuring Interfaces .................................................................................................................164
Viewing Port Properties ...............................................................................................................167
Aggregating Ports ...............................................................................................................169
Configuring LACP........................................................................................................................170
Defining LAG Members .........................................................................................................................172
Configuring VLANs ............................................................................................................. 174
Defining VLAN Properties............................................................................................................175
Defining VLAN Membership ........................................................................................................177
Defining VLAN Interface Settings ................................................................................................179
Configuring GARP .......................................................................................................................181
Defining GARP ......................................................................................................................................181
Defining GVRP ......................................................................................................................................183
Defining VLAN Groups ................................................................................................................185
Configuring Voice VLAN ........................................................................................................................190
IP Routing ........................................................................................................................... 195
Configuring IP Information .................................................................................................. 197
Configuring IP Information ...........................................................................................................197
Configuring IP Interfaces .............................................................................................................197
Defining IP Addresses ...........................................................................................................................198
Defining Default Gateways ....................................................................................................................201
Configuring ARP ....................................................................................................................................202
Configuring DHCP .................................................................................................................................206
Defining UDP Relay...............................................................................................................................214
Configuring Domain Name Servers.............................................................................................218
Defining DNS Servers............................................................................................................................218
Defining DNS Host Mapping..................................................................................................................220
Defining the Forwarding Database ..................................................................................... 222
Defining Static Forwarding Database Entries..............................................................................223
Defining Dynamic Forwarding Database Entries .........................................................................225

DXS-3227, DXS-3227P, DXS-3250 and DXS-3250E EWS User Guide
Page 4
Configuring Spanning Tree................................................................................................. 227
Defining Classic Spanning Tree..................................................................................................228
Defining STP on Interfaces ......................................................................................................... 230
Defining Rapid Spanning Tree....................................................................................................233
Defining Multiple Spanning Tree .................................................................................................236
Defining MSTP Instance Settings ......................................................................................................... 237
Defining MSTP Interface Settings......................................................................................................... 239
Configuring Multicast Forwarding ....................................................................................... 242
Defining IGMP Snooping............................................................................................................. 243
Defining Multicast Bridging Groups............................................................................................. 246
Defining Multicast Forward All Settings ................................................................................................ 248
Configuring Multicast TV ............................................................................................................. 249
Defining IGMP Snooping for Multicast TV ............................................................................................ 250
Viewing Multicast TV Members............................................................................................................. 252
Configuring SNMP .............................................................................................................. 253
SNMP v1 and v2c ....................................................................................................................... 253
SNMP v3 ..................................................................................................................................... 253
Configuring SNMP Security ........................................................................................................ 254
Defining SNMP Security ....................................................................................................................... 254
Defining SNMP Views........................................................................................................................... 256
Defining SNMP Group Profiles ............................................................................................................. 258
Defining SNMP Group Members .......................................................................................................... 261
Defining SNMP Communities ............................................................................................................... 264
Configuring SNMP Notifications..................................................................................................267
Defining SNMP Notification Global Parameters....................................................................................267
Defining SNMP Notification Filters........................................................................................................ 269
Defining SNMP Notification Recipients................................................................................................. 271
Configuring Quality of Service ............................................................................................ 275
Configuring Quality of Service..................................................................................................... 275
Quality of Service Overview ........................................................................................................ 276
VPT Classification Information.............................................................................................................. 276
CoS Services ........................................................................................................................................ 276
Defining General QoS Settings ...................................................................................................277
Configuring QoS General Settings........................................................................................................ 277
Configure Bandwidth Settings............................................................................................................... 279
Defining VLAN Rate Limiting ................................................................................................................ 281
Defining Queues ................................................................................................................................... 284
Configuring QoS Mapping........................................................................................................... 285
Mapping CoS Values to Queues........................................................................................................... 285
Mapping DSCP Values to Queues........................................................................................................ 286
Configuring Basic Mode .............................................................................................................. 287
Configuring Trust Mode ........................................................................................................................ 287
Configuring DSCP Rewrite ................................................................................................................... 288

Table of Contents
Page 5
Configuring Advanced QoS Settings ........................................................................................... 289
Defining Policy Properties......................................................................................................................289
Defining Tail Dropping ...........................................................................................................................291
Defining Policy Profiles ..........................................................................................................................297
Configuring LLDP................................................................................................................302
Defining Global LLDP Properties.................................................................................................303
Defining LLDP Port Settings........................................................................................................305
Defining Media Endpoint Discovery Network Policy....................................................................308
Defining LLDP MED Port Settings ...............................................................................................311
Viewing the LLDP Neighbors Information....................................................................................315
Managing System Files....................................................................................................... 318
File Management Overview.........................................................................................................318
Downloading System Files ..........................................................................................................319
Uploading System Files...............................................................................................................321
Activating Image Files ................................................................................................................. 323
Copying Files...............................................................................................................................324
Managing System Files ...............................................................................................................325
Managing System Logs ...................................................................................................... 327
Enabling System Logs.................................................................................................................328
Viewing the Device Memory Logs ...............................................................................................330
Clearing Device Memory Logs...............................................................................................................330
Viewing the FLASH Logs............................................................................................................. 331
Clearing FLASH Logs ............................................................................................................................331
Defining Servers Log Parameters ...............................................................................................332
Managing Device Diagnostics............................................................................................. 334
Configuring Port Mirroring......................................................................................................................334
Viewing Copper Cable Tests .................................................................................................................337
Viewing Device Health...........................................................................................................................339
Viewing Optical Transceivers ................................................................................................................340
Viewing the CPU Utilization ...................................................................................................................341
Viewing TCAM Resource Information....................................................................................................342
TCAM Allocation ...................................................................................................................................342
Configuring System Time.................................................................................................... 344
Configuring Daylight Savings Time .............................................................................................344
Configuring SNTP........................................................................................................................348
Defining SNTP Global Settings ...................................................................................................349
Defining SNTP Authentication .....................................................................................................351
Defining SNTP Servers ...............................................................................................................353
Defining SNTP Interface Settings................................................................................................355

DXS-3227, DXS-3227P, DXS-3250 and DXS-3250E EWS User Guide
Page 6
Viewing Statistics ................................................................................................................ 357
Viewing Interface Statistics ......................................................................................................... 357
Viewing Device Interface Statistics ....................................................................................................... 358
Resetting Interface Statistics Counters................................................................................................. 359
Viewing Port Utilization Statistics.......................................................................................................... 360
Viewing Etherlike Statistics ................................................................................................................... 361
Resetting Etherlike Statistics Counters................................................................................................. 362
Viewing GVRP Statistics....................................................................................................................... 363
Viewing EAP Statistics.......................................................................................................................... 364
Resetting GVRP Statistics Counters..................................................................................................... 365
Managing RMON Statistics ......................................................................................................... 366
Viewing RMON Statistics ...................................................................................................................... 367
Resetting RMON Statistics Counters.................................................................................................... 368
Configuring RMON History ................................................................................................................... 369
Defining RMON Alarms......................................................................................................................... 376
Viewing QoS Statistics ................................................................................................................ 378
Viewing Aggregated Policer Statistics .................................................................................................. 378
Viewing Policer Statistics ...................................................................................................................... 379
Viewing Queue Statistics ...................................................................................................................... 380
Hardware Specifications ....................................................................................................................... 382
DXS-32XX Features ............................................................................................................................. 383
Problem Solving .......................................................................................................................... 390
Troubleshooting Solutions........................................................................................................... 390
Contacting D-Link Technical Support.......................................................................................... 394
Product Registration.................................................................................................................... 421
International Offices .................................................................................................................... 422

Preface
Page 7
Preface
The Embedded Web System (EWS) is a network management system. The D-Link Embedded Web Interface con-
figures, monitors, and troubleshoots network devices from a remote web browser. The D-Link Embedded Web
Interface web pages are easy-to-use and easy-to-navigate. In addition, The D-Link Embedded Web Interface pro-
vides real time graphs and RMON statistics to help system administrators monitor network performance.
This preface provides an overview to the D-Link Embedded Interface User Guide, and includes the following sec-
tions:
•DXS-3227, DXS-3227P, DXS-3250 and DXS-3250E User Guide Overview
•Intended Audience

DXS-3227, DXS-3227P, DXS-3250 and DXS-3250E EWS User Guide
Page 8
DXS-3227, DXS-3227P, DXS-3250 and DXS-3250E User
Guide Overview
This section provides an overview to the D-Link Web System Interface User Guide. The D-Link Web System Inter-
face User Guide provides the following sections:
•Section 1, Device Description — Provides a system description including the hardware components.
•Section 2, Mounting Device — Provides step-by-step instructions for installing the device.
•Section 3, Initial Configuration — Provides step-by-step instructions for the initial device configuration.
•Section 4, Getting Started — Provides information about using the EWS, including The D-Link Embedded
Web Interface interface, management, and information buttons, as well as information about adding, modify-
ing, and deleting device information.
•Section 5, Managing Device Information — Provides information about opening the device zoom view,
defining general system information, and enabling Jumbo frames.
•Section 6, Managing Power over Ethernet Devices — Provides information about configuring PoE.
•Section 7, Stacking — Provides information about stacking.
•Section 8, Configuring Device Security — Provides information about configuring device security for man-
agement security, traffic control, and network security.
•Section 9, Configuring Ports — Provides information about configuring ports.
•Section 10, Aggregating Ports — Provides information about configuring Link Aggregated Groups and
LACP.
•Section 11, Configuring VLANs — Provides information about configuring and managing VLANs, including
information about GARP and GVRP, and defining VLAN groups.
•Section 12, IP Routing — Provides information for managing IP routing.
•Section 13, Configuring IP Information — Provides information about defining device IP addresses, ARP,
and Domain Name Servers.
•Section 14, Defining the Forwarding Database — Provides information about configuring and managing
both static and dynamic MAC addresses.
•Section 15, Configuring Spanning Tree — Provides information about configuring Spanning Tree Protocol
and the Rapid Spanning Tree Protocol.
•Section 16, Configuring Multicast Forwarding — Provides information about Multicast Forwarding.
•Section 17, Configuring SNMP — Provides information about defining SNMP v1,v2c, and v3 management,
including SNMP filters and notifications.
•Section 18, Configuring Quality of Service — Provides information about configuring Quality of Service on
the device.
•Section 19, Configuring LLDP — Provides information about configuring LLDP.
•Section 20, Managing System Files — Provides information about downloading, uploading, and copying
system files.
•Section 21, Managing System Logs — Provides information about enabling and defining system logs.
•Section 22, Managing Device Diagnostics — Provides information about configuring port mirroring, testing
copper and fiber cables, and viewing device health information.
•Section 23, Configuring System Time — Provides information about configuring system time, including
Daylight Savings Time parameters and Simple Network Time Protocol (SNTP) parameters.
•Section 24, Viewing Statistics — Provides information about viewing device statistics, including RMON sta-
tistics, device history events, and port and LAG utilization statistics.
•Appendix A, Device Specifications and Features — Provides device specifications and features.
•Appendix B, Troubleshooting — Provides basic troubleshooting for installing the device.
•Appendix C, Technical Support — Provide information receiving technical Support

Preface
Intended Audience
Page 9
Intended Audience
This guide is intended for network administrators familiar with IT concepts and terminology.

DXS-3227, DXS-3227P, DXS-3250 and DXS-3250E EWS User Guide
Page 10
Section 1. Device Description
This section contains a description of the D-Link DXS-3250,D-Link DXS-3250E, D-Link DXS-3227 and D-Link
DXS-3227P, and contains the following topics:
•Viewing the Device
•Ports Description
•Cable Specifications
•LED Definitions
•Cable, Port, and Pinout Information
•Physical Dimensions
Viewing the Device
The devices described in this section are stackable Gigabit Ethernet Managed Switches. Device management is
performed using an Embedded Web Server (EWS) or through a Command Line Interface (CLI). The device con-
figuration is performed via an RS-232 interface.
This section contains descriptions for the following:
•DXS-3250 Front Panel
•DXS-3250E Front Panel
•DXS-3227 Front Panel
•DXS-3227P Front Panel
•Back Panels

Device Description
Viewing the Device
Page 11
DXS-3250 Front Panel
The D-Link DXS-3250 is a 48 port Gigabit Ethernet Managed Switch. The device contains 48 gigabit network ports
and 4 SFP Ports on the front panel for network connectivity.
The following figure illustrates the DXS-3250 front panel.
Figure 1: DXS-3250 Front Panel
The device front panel is configured as follows:
•48 Giga Ethernet ports — RJ-45 ports designated as 10/100/1000Base-T. The RJ-45 ports are designated
as ports Ports 1-48.
•RS-232 Console port — An asynchronous serial console port supporting the RS-232 electrical specification.
The port is used to connect the device to the console managing the device.
•Four SFP Ports — There are four SFP port, which contains 1000Base-X (fiber) connections.
On the front panel there are the Port activity LEDs on each port with the system LEDs displayed separately.
DXS-3250E Front Panel
The D-Link DXS-3250E is designed to contain all ports, LEDs, and power inlets on the front panel. The 3250E is a
48 port Gigabit Ethernet Managed Switch. The device contains 48 gigabit network ports and 4 SFP Ports on the
front panel for network connectivity.
Figure 2: DXS-3250E Front Panel
The device front panel is configured as follows:
•48 Giga Ethernet ports — RJ-45 ports designated as 10/100/1000Base-T. The RJ-45 ports are designated
as ports Ports 1-48.
SFP
SFP RS-232
Diagnostics
Port
1000 Base-T Ports
System
LEDs
Speed
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Link
Act
45 47
46 48
Link
Act
Act
Link
1000M 100M 10M
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
MS
P50
P49
PWR
FAN
FAULT
RPS
Dia g no sti cs RS -232
DCE,9000,n,8,1
D-Link
DXS-3250
Act
S peed
1000M100M10M
46 48
PWR
FAN
FAULT
RPS
P49
P50
MS
47
Link
Act
Link
Rese t
DX S-3250 E
ActLink
D-Link
49 50
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48 45 47
PWR RP S
SFP
Optional Dual XFP Module slot
Hot-Plug Power Supplies
RS-232 Console port
System LEDs Port LEDs
Optional
Di agnosticsRS-232
DCE,9000,n,8,1

DXS-3227, DXS-3227P, DXS-3250 and DXS-3250E EWS User Guide
Page 12
•RS-232 Console port — An asynchronous serial console port supporting the RS-232 electrical specification.
The port is used to connect the device to the console managing the device.
•Four SFP Ports — There are four SFP port, which contains 1000Base-X (fiber) connections.
On the front panel there are the Port activity LEDs on each port with the system LEDs displayed separately.
•Two Power Connectors — Two AC power supplies interfaces.
•An Optional Dual Module Slot - 10G Fiber XFP dual module.
DXS-3227 Front Panel
The D-Link DXS-3227 is a 24 port Gigabit Ethernet Managed Switch. The device contains 24 gigabit network ports
and 4 SFP Ports on the front panel for network connectivity.
The following figure illustrates the DXS-3227 front panel.
Figure 3: DXS-3227 Front Panel
The device front panel is configured as follows:
•24 Giga Ethernet ports — RJ-45 ports designated as 10/100/1000Base-T. The RJ-45 ports are designated
as ports Ports 1-24.
•RS-232 Console port — An asynchronous serial console port supporting the RS-232 electrical specification.
The port is used to connect the device to the console managing the device.
•Four SFP Ports — There are four SFP port, which contains 1000Base-X (fiber) connections.
•One XFP Port — The 10 Gigabit Small Form Factor Pluggable (XFP) port provides protocol-independent
transmission and receiver functionality for 10Gbps Ethernet.
On the front panel there are the Port activity LEDs on each port with the system LEDs displayed separately.
MS
27
26
P25PWR
FAN
FAUL T
RPS
1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24 21 23
22 24
25
Diagnostic sRS-232
DCE, 900 0, n ,8,1
SFP
SFP RS-232
Diagnostics Port
1000 Base-T Ports
System
LEDs
Port
LEDs
XFP
Port
D- Li n k
DXS-3227
Act
Link/
Sp ee d 1000M
100M
10M
24681012141618202224
232119171513119753

Device Description
Viewing the Device
Page 13
DXS-3227P Front Panel
The D-Link DXS-3227P is a 24 port Gigabit Ethernet Managed Switch. The device contains 24 gigabit network
ports and 4 SFP Ports on the front panel for network connectivity.
The following figure illustrates the DXS-3227P front panel.
Figure 4: DXS-3227P Front Panel
The device front panel is configured as follows:
•24 Giga Ethernet ports — RJ-45 ports designated as 10/100/1000Base-T. The RJ-45 ports are designated
as ports Ports 1-48.
•RS-232 Console port — An asynchronous serial console port supporting the RS-232 electrical specification.
The port is used to connect the device to the console managing the device.
•Four SFP Ports — There are four SFP port, which contains 1000Base-X (fiber) connections.
•One XFP Port — The 10 Gigabit Small Form Factor Pluggable (XFP) port provides protocol-independent
transmission and receiver functionality for 10Gbps Ethernet.
On the front panel there are the Port activity LEDs on each port with the system LEDs displayed separately.
Ac tLink
Spe e d 1000 M
100 M
10 M
23
24
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24 21 23
22 24
25
Di a gn o sti cs RS -2 3 2
D CE , 9 00 0, n , 8, 1
SFP
SFP RS-232
Diagnostics Port
1000 Base-T Ports
System
LEDs
Port
LEDs
XFP
Port
PoE Power Off
On
Error
Overload
MS
27
26
P25PWR
FAN
FAULT
RPS
21191715131197531
246810121416182022
D-Link
DX S-3227P

DXS-3227, DXS-3227P, DXS-3250 and DXS-3250E EWS User Guide
Page 14
Back Panels
The following figure illustrates DXS-3250 / DXS-3227 back panel.
Figure 5: DXS-3250 and DXS-3227 Back Panel
The DXS-3250 and DXS-3227 Back Panel is configured as follows:
•Restore Defaults Button — Restores device factory defaults. The Restore Defaults button does not extend
beyond the device’s front panel surface. This it to avoid accidental device resetting.
•Two Optional Stacking Ports — The devices provide two optional stacking ports (XFP/CX-4).
•RPS Connector — Redundant Power Supply (RPS) DC connector.
•Power Connector — AC power supply interface.
The 3250E Back panel is empty and all ports and connectors are located on the front panel.
The following figure illustrates the DXS-3227P back panel.
Figure 6: DXS-3227P Back Panel
The DXS-3227P Back Panel is configured as follows:
•Restore Defaults Button — Restores device factory defaults. The Restore Defaults button does not extend
beyond the device’s front panel surface. This it to avoid accidental device resetting.
•Two Optional Stacking Ports — The device provides two optional stacking ports (XFP/CX-4).
•RPS Connector — Redundant Power Supply (RPS) DC connector.
•Power Connector — AC power supply interface.
_
Restore
De fa u l ts
Power
Connector
Optional
RPS
Connector
Restore Defaults
Button Module Bays for
Optional XFP or
CX-4 10G Modules
_
Power
Connector
Optional
RPS
Connector
Restore
Defaults
Button
Module Bays for
Optional XFP or
CX-4 10G
Modules
Restore
Defaults

Device Description
Ports Description
Page 15
Ports Description
This section describes the device ports and includes the following topics:
•1000Base-T Gigabit Ethernet Ports
•SFP Port
•XFP Port (DXS-3227/DXS-3227P)
•CX- 4 Port
•RS-232 Console Port
1000Base-T Gigabit Ethernet Ports
The device contains a 1000 Base-TX Gigabit port. The port is an RJ-45 port which supports half- and full-duplex
mode 10/100/1000 Mbps.
SFP Port
Small Form Factor Pluggable (SFP) Optical Transceivers are integrated duplex data GBIC links for bi-directional
communication over multimode optical fiber, designed for high-speed Fiber Channel data links. The SFP port is
designated as 1000Base-X.
The SFP (GBIC) port can be removed and inserted as required. The following figure illustrates the GBIC insertion/
removal.
Figure 7: Inserting/Removing an SFP Module into the Device

DXS-3227, DXS-3227P, DXS-3250 and DXS-3250E EWS User Guide
Page 16
XFP Port
The 10 Gigabit Small Form Factor Pluggable (XFP) port provides protocol-independent transmission and receiver
functionality for 10Gbps Ethernet. The XFP port is located on the DXS-3227/3227P front panel, and an optional
XFP module can be inserted into the device’s back panel.
The XFP module can be removed and inserted as required, as the figure below illustrates.
Caution
It is recommended to disconnect the power from the switch before inserting or removing the XFP Module.
Figure 8: Inserting/Removing XFP Module
Figure 9: Inserting/Removing XFP into/from Module

Device Description
Ports Description
Page 17
CX- 4 Port
The 10G-Base- CX4 is a low-cost switch interface which operates on twin-axial copper cables assemblies of up to
5 meters. It is inserted into the device’s back panel and can be removed and inserted as required, as the figure
below illustrates.
Caution
It is recommended to disconnect the power from the switch before inserting or removing the CX-4 module.
Figure 10: Inserting/Removing the CX- 4 Module
Stacking Ports
The device can provide two stacking XFP or CX-4 ports. One stacking port provides an Up connection, while the
second provides a Down stacking connection.
RS-232 Console Port
The RS-232 port is an asynchronous serial console port supporting the RS-232 electrical specification. The port is
used to connect the device to a console managing the device. This interface configuration is as follows:
•Eight data bits.
•One stop bit.
•No parity.
•Baud rate is 9600 (default).
•Console speeds of 57600 and 115200.

DXS-3227, DXS-3227P, DXS-3250 and DXS-3250E EWS User Guide
Page 18
Cable Specifications
The following table contains the various cable specification for the DXS-3250, DXS-3250E, and DXS-3227P
devices:
Table 1: DXS-3250/DXS-3250E/DXS-3227/DXS-3227P Cable Specifications
Cable Type Description
1000Base-T UTP Cat. 5e (100 meters max.)
UTP Cat. 5 (100 meters max.)
EIA/TIA-568B 150-ohm STP (100 meters max.)
1000BASE-LX Single-mode fiber module (10km)
1000BASE-SX Multi-mode fiber module (550m)
1000BASE-LH Single-mode fiber module (40km)
1000BASE-ZX Single-mode fiber module (80km)
Mini-GBIC SFP Transceiver for 1000BASE-LX Single-mode fiber module (10km)
SFP Transceiver for 1000BASE-SX Multi-mode fiber module (550m)
SFP Transceiver for 1000BASE-LH Single-mode fiber module (40km)
SFP Transceiver for 1000BASE-ZX Single-mode fiber module (80km)
10GBASE- CX4 Twin-axial copper cable (5 meters max.)
10GBASE- XFP SR - 850 nm, 82 m, single mode fiber nodule.
LR - 1310 nm, 10 km, single mode fiber module.

Device Description
LED Definitions
Page 19
LED Definitions
The device front panels contain Light Emitting Diodes (LED) that indicate the device status.The different LED
types are as follows:
•Port LEDs — Indicate each port status.
•System — Indicating the device power supply status.
Port LEDs
1000Base-T Gigabit Ethernet RJ-45 Port LEDs
The LEDs on the three devices are differently indicated.
The following figure illustrates the DXS-3250/DXS-3250E port LEDs.
Figure 11: DXS-3250/DXS-3250E 1000Base -T Gigabit Ethernet RJ-45 Port LEDs
The DXS-3227 device has the LED indications on a LED panel on the left side of the device.
The following figure illustrates the port LEDs.
Figure 12: DXS-3227 1000Base-T Gigabit Ethernet RJ-45 Port LEDs
ActLink/
Speed
2 4 681012141618202224
2321191715131197531