IBM 8275 User manual

8275 Model 416 High Performance Ethernet
Workgroup Switch
User’s Guide
GC30-4026-00
IBM

8275 Model 416 High Performance Ethernet
Workgroup Switch
User’s Guide
GC30-4026-00
IBM

Note
Before using this information and the product it supports, be sure to read “Appendix A. Safety Information” on page 67 and
“Appendix B. Notices” on page 73.
First Edition (May 1999)
This edition applies to Release 1.0 of the IBM 8275 Model 416 High Performance Ethernet Workgroup Switch.
Order publications through your IBM representative or the IBM branch office serving your locality. Publications are
not stocked at the address given below.
A form for readers’ comments appears at the back of this publication. If the form has been removed, address your
comments to:
Department CGF
Design & Information Development
IBM Corporation
PO Box 12195
RESEARCH TRIANGLE PARK NC 27709
USA
When you send information to IBM, you grant IBM a nonexclusive right to use or distribute the information in any
way it believes appropriate without incurring any obligation to you.
© Copyright International Business Machines Corporation 1999. All rights reserved.
US Government Users Restricted Rights – Use duplication or disclosure restricted by GSA ADP Schedule Contract
with IBM Corp.

Contents
Figures ........................... vii
Tables ........................... ix
About This Guide ....................... xi
Who Should Use This Guide ................... xi
How This Manual is Organized................... xi
Accessing the Softcopy Library .................. xi
Online Support ........................ xii
Obtaining Service ....................... xii
Chapter 1. Introduction ..................... 1
Product Overview ....................... 1
8275-416 Functions....................... 1
Layer 2 Switching ...................... 1
Management and User Interfaces................. 2
Security .......................... 3
Reliability and Serviceability................... 3
Performance ........................ 3
Year 2000 (Y2K) ....................... 3
Hardware .......................... 4
Cabling Requirements ..................... 4
Front Panel......................... 5
8275-416 Status LEDs..................... 6
Ethernet Port LEDs ...................... 77
Feature Module LEDs ..................... 8
Physical Characteristics .................... 9
Chapter 2. Accessing the 8275-416 ................11
Connectivity Methods ......................11
Out-of-Band Connectivity....................11
In-Band Connectivity - Telnet, Web, SNMP .............13
Chapter 3. Configuring your 8275-416 ...............17
Configuring IP information ....................17
Concepts About Making Configuration Changes ............19
Making Configuration Changes .................19
Processing Configuration Changes ................19
Saving Configuration Changes Across a Reset or Power Cycle......20
Making Configuration Changes via the Terminal Interface .........20
Making Configuration Changes .................20
Applying (Processing) Configuration Changes ............21
Saving Configuration Changes Across a Reset or Power Cycle......21
Making Configuration Changes via the Web Interface ..........22
Making Configuration Changes .................22
Processing Configuration Changes ................22
Saving Configuration Changes Across a Reset or Power Cycle......23
Making Configuration Changes via SNMP ..............23
Making Configuration Changes .................23
Processing Configuration Changes ................23
Saving Configuration Changes Across a Reset or Power Cycle......23
Chapter 4. Using the Terminal Interface ..............25
© Copyright IBM Corp. 1999 iii

Login Panel..........................25
The Main Menu ........................26
System Information .......................26
Inventory Information .....................27
System Description ......................28
Management .........................29
Configuring the 8275-416 for Network Connectivity ..........29
Configuring Serial Port.....................30
Configuring for DHCP or BootP Server...............31
Configuring SNMP ......................33
Configuring Traps ......................36
Configuring Telnet ......................38
Ping ...........................39
ARP Cache.........................40
Device Configuration ......................42
Configuring the 8275-416....................4246
Configuring Spanning Tree Protocol (STP) .............46
Configuring Broadcast Storm Recovery ..............48
Configuring 802.3x Flow Control .................49
Statistics ...........................50
Port Summary Statistics ....................50
Port Detailed Statistics.....................50
Management Statistics.....................51
User Account Management ....................52
System Utilities ........................53
Saving Applied Changes ....................53
Logging Out ........................53
Handling Files ........................54
Reset Utility.........................56
Resetting System ......................57
Resetting Configuration Data to Factory Default Values.........57
Resetting Passwords to Factory Default Values ...........58
Debug Utility ........................59
Chapter 5. Using the Web Interface ................61
Web Page Layout .......................61
Starting the Web Interface ....................61
Commands .........................62
Chapter 6. Troubleshooting and Obtaining Service ..........63
Diagnosing Problems ......................63
Obtaining Software .......................63
Troubleshooting in a Network ...................63
Start of Troubleshooting Process ..................63
Choosing a Troubleshooting Procedure ...............64
Procedure A ........................64
Procedure B ........................64
Procedure C ........................65
Procedure D ........................65
Obtaining Service .......................65
Appendix A. Safety Information..................67
Appendix B. Notices ......................73
Notice to Users of Online Versions of This Book ............73
Electronic Emission Notices....................73
iv 8275-416 User’s Guide

Federal Communications Commission (FCC) Statement ........73
Industry Canada Class A Emission Compliance Statement .......74
Avis de conformité aux normes d’Industrie Canada ..........74
European Norm (EN) Statement .................74
Japanese Voluntary Control Council for Interference (VCCI) Statement . . . 75
Korean Communications Statement ................75
Taiwanese Class A Warning Statement...............76
Class 1 Laser Statement .....................76
Class 1 LED Statement .....................76
Trademarks..........................76
Appendix C. Cable Pinout Diagrams ................79
Straight-Through 10BASE-T/100BASE-TX Cables............79
Straight-Through 10BASE-T/100BASE-TX Cables for STP ........80
Crossover 10BASE-T/100BASE-TX Cables ..............80
Crossover 10BASE-T/100BASE-TX Cables for STP ...........81
EIA-232 Port .........................81
Null-Modem Cables.......................82
Appendix D. Interface Conventions for the Console..........83
Index ............................87
Readers’ Comments — We’d Like to Hear from You..........93
Contents v

vi 8275-416 User’s Guide

Figures
1. Front Panel of the 8275-416 . ................. 5
2. Status LEDs for the 8275-416 .................. 6
3. Port Status LEDs for the 8275-416 and the 10/100BASE-TX Ethernet
Feature Module. ...................... 7
4. Status LEDs for the 10/100BASE-TX Ethernet Feature Module...... 8
5. Status LEDs for the 100BASE-FX Ethernet Feature Module. ...... 9
6. Out-of-Band Connectivity — Locally Attached Terminal ........12
7. Out-of-Band Connectivity — Remotely Attached Terminal .......12
8. In-Band Connectivity ....................14
9. Configuring BootP/Static DHCP. ................18
10. Configuring Network Connectivity (IP Information). .........18
11. Log In Panel for Terminal Interface ...............25
12. Main Menu for Terminal Interface ................26
13. System Information Menu...................27
14. Inventory Information ....................27
15. System Description .....................28
16. Management Menu .....................29
17. Network Connectivity Configuration ...............29
18. Serial Port Configuration ...................31
19. Server Configuration.....................33
20. SNMP Community Configuration ................34
21. SNMP Trap Receiver Configuration ...............35
22. Trap Flags Configuration ...................36
23.TrapLog.........................37
24. Trap Log Status ......................38
25. Telnet Configuration .....................39
26. Ping...........................40
27. ARP Cache ........................41
28. Device Configuration ....................42
29. Switch Configuration.....................43
30. Port Configuration .....................44
31. Port Monitoring ......................46
32. Spanning Tree Switch Configuration/Status ............47
33. Spanning Tree Port Configuration/Status .............48
34. Broadcast Storm Recovery ..................49
35. 802.3x Flow Control .....................49
36. Port Summary Statistics ...................50
37. Port Detailed Statistics ....................51
38. Management Statistics ....................51
39. User Account Management Menu ................52
40. Save Applied Changes Menu .................53
41. Logout Utility .......................54
42. Downloading File to the 8275-416 . ...............55
43. Uploading File from the 8275-416 . ...............55
44. Reset Menu........................57
45. Reset Menu........................57
46. Reset Configuration Data to Factory Defaults ...........58
47. Reset Passwords to Factory Defaults ..............59
48. Straight-Through UTP Cable (RJ-45 to RJ-45), T568A ........79
49. Straight-Through UTP Cable (RJ-45 to RJ-45), T568B ........79
50. Straight-Through STP Cable (RJ-45 to IBM Data Connector)......80
51. Crossover UTP Cable (RJ-45 to RJ-45), T568A...........80
52. Crossover UTP Cable (RJ-45 to RJ-45), T568B...........80
© Copyright IBM Corp. 1999 vii

53. Crossover STP Cable (RJ-45 to IBM Data ConnectorCrossover) ....81
54. Pinout of the EIA-232 Port ..................81
55. EIA-232 Modem Cable for Terminal with 25-Pin Connector ......82
56. EIA-232 Modem Cable for Terminal with 9-Pin Connector .......82
viii 8275-416 User’s Guide

Tables
1. Ethernet Cable Requirements ................. 4
2. Connectivity Methods and Available User Interfaces .........11
3. MIBs Supported by the 8275-416 . ...............14
4. Troubleshooting— Isolating Problems ..............64
5. Special Keys and Commands Used with the Terminal Interface .....83
© Copyright IBM Corp. 1999 ix

x8275-416 User’s Guide

About This Guide
This manual briefly describes the features and capabilities of the 8275 Model 416
High Performance Ethernet Workgroup Switch. However, its primary purpose is to
describe how to use the capabilities offered by the 8275-416 to configure, obtain
status information, and monitor performance of the switch in your network.
Who Should Use This Guide
This manual is intended for the network administrator or person responsible for
integrating, maintaining and monitoring the 8275-416 in your network. The person
responsible for coordinating installation and service for the 8275-416 will also find
this manual useful.
How This Manual is Organized
This manual contains the following chapters and appendixes:
vChapter 1. Introduction describes the functions and capabilities of the 8275-416 .
vChapter 2. Accessing the 8275-416 describes the various physical methods of
accessing the 8275-416 .
vChapter 3. Configuring your 8275-416 describes initial configuration of IP
information.
vChapter 4. Using the Terminal Interface describes the using functions of the
terminal interface.
vChapter 5. Using the Web Interface introduces the Web interface.
vChapter 6. Troubleshooting and Obtaining Service gives suggestions for solving
problems obtaining service.
vAppendix A. Safety Information contains translated safety instructions to observe
when performing troubleshooting proccedures.
vAppendix B. Notices lists important notices about the use of this product.
vAppendix C. Cable Pinout Diagrams describes and illustrates pinout diagrams for
ethernet and null modem cable connectors.
vAppendix D. Interface Conventions for the Console describes the definitions and
functions of special keys and commands that are used by the terminal interface.
Accessing the Softcopy Library
Softcopy versions of 8275-416 product documentation is available from either the
Documentation CD-ROM (shipped with the product) or the IBM Networking
Products Web site. To access product documentation shipped on the CD-ROM,
follow the instructions in the booklet that accompanies the CD-ROM. Visit the
following Web site to access the 8275-416 documentation at:
http://www.networking.ibm.com/did/8275bks.html
© Copyright IBM Corp. 1999 xi

Online Support
To obtain support information, including technical tips, current product information,
and code updates and fixes for the 8275-416 , visit the IBM Networking Tech
Support page at:
http://www.networking.ibm.com/support
You may also subscribe to receive e-mail notifications about code updates, tips, and
FAQs for your 8275-416 .
Obtaining Service
If you need assistance in troubleshooting or you need service for your 8275–416,
call IBM at:
v1 800 772-2227 in the United States
v1 800 426-7378 (1 800 IBM-SERV) in Canada.
vIn other locations, contact your place of purchase.
Refer to your IBM Warranty for information concerning service for the product.
xii 8275-416 User’s Guide

Chapter 1. Introduction
This chapter briefly describes the functions, capabilities, and benefits of the 8275
Model 416 High Performance Ethernet Workgroup Switch. This information helps
you to plan for and use the 8275-416 in your network.
Product Overview
Fast Ethernet switching continues to evolve from high-end backbone applications to
desktop switching applications. The 8275-416 provides a low cost and powerful
Layer 2 switch solution. It is an attractive base switch offering with the following key
functions:
vHigh performance, Layer 2, managed switch
v16 base ports (10/100BASE-TX), expandable to 24 or 32 ports. The expansion
can be any combination of the following optional feature modules:
– 8-Port 10/100BASE-TX
– 8-Port 100BASE-FX
vRobust management support; VT100 terminal interface, Web interface, SNMP
vBackplane performance 10 Giga-bits per second Ethernet switching
vDesktop and segment switching infrastructure
vAffordable migration to higher performance networks
Network administrators have a choice of three easy-to-use management methods:
VT100 interface, Web-based, and Simple Network Management Protocol (SNMP).
These management methods enable the network administrator to configure,
manage, and control the 8275-416 locally or from anywhere on the network.
The Spanning Tree Protocol (STP) provides fault tolerance on the network.
8275-416 Functions
This section describes the functional support included in the 8275-416 :
vLayer 2 switching
vManagement and user interface
vSecurity
vReliability and serviceability
vPerformance
vFlow Control
vY2K
Layer 2 Switching
The 8275-416 is a frame-based Layer 2 Ethernet switch. In a Layer 2 switch, frame
forwarding is based on MAC addresses. The 8275-416 supports the IEEE P802.1D
(1990) standard.
© Copyright IBM Corp. 1999 1

802.3x Flow Control
The 8275-416 supports the 802.3x flow control, which, when enabled allows the
transmission of data frames to be inhibited for a specified period of time. The
default for 802.3x flow control is
Disabled . 802.3x flow control is valid only when the
port is in full duplex mode.
Broadcast Storm Recovery
The 8275-416 detects broadcast storms and automatically blocks broadcast traffic
to minimize the impact of the broadcast storm on the rest of the network. You can
enable or disable this function at a switch level. If broadcast storm recovery is
enabled, each port will monitor incoming broadcast traffic. If the broadcast traffic
exceeds 20 percent of the port speed, the broadcast traffic on this port is blocked
until the broadcast traffic returns to 20 percent or below port speed. The default for
broadcast storm recovery is
Disabled .
Address Aging
An address recognized by the switch is removed from the port lookup tables after a
period of time if no frames have been received from that address. The default value
for the aging period is 300 seconds (5 minutes), but it can be changed by the user.
The time values range from 10 seconds to 1000000 seconds.
If a port lookup table is full and a frame is received with a new address that needs
to be added to the table, the frame is sent multicast.
Management and User Interfaces
The network administrator has a choice of these easy-to-use management
methods:
vA VT100 terminal interface allows the network administrator to fully manage the
8275-416 using a standard terminal or terminal emulator connected over the
network using Telnet or connected to the 8275-416 ’s serial port (EIA 232).
“Chapter 2. Accessing the 8275-416” on page 11 describes how to access the
8275-416 using this interface and “Chapter 4. Using the Terminal Interface” on
page 25 instructs you about using this interface.
vA Web-based interface enables you to manage the 8275-416 through standard
Web browsers. There must be a physical path between the Web browser and the
8275-416 over the Ethernet network to use this method of connectivity.
“Chapter 2. Accessing the 8275-416” on page 11 describes how to access the
8275-416 using this interface and “Chapter 5. Using the Web Interface” on
page 61 instructs you about using this interface.
vThe 8275-416 has a Simple Network Management Protocol (SNMP) agent that
the network administrator can access with a standard Network Manager. The
following MIBs (Management Information Base) are supported:
– MIB II (RFC 1213)
– 8275-416 Enterprise MIB
– RMON MIB (RFC 1757)
– Bridge MIB (RFC 1493)
– IEEE 802.3 Ethernet (RFC 1643)
v8275-416 interoperates with the following SNMP Managers:
– Any standard MIB Browser (SNMP V1)
28275-416 User’s Guide

– IBM Nways Manager for NT (V2.0 or later)
– IBM Nways Manager for HP-UX (V2.0 or later)
– IBM Nways Manager for AIX (V2.0 or later)
Security
User access security can be implemented using the following functions of the
8275-416 :
vUser Accounts: The 8275-416 supports up to six accounts (one user with
Read/Write status and five with Read Only status) for terminal interface and Web
access. Access to the 8275-416 configuration panels is password protected. Only
one user name with Read/Write status is allowed to be configured, which
prevents potential conflicts in configuration changes. The default Read/Write user
name is:
admin , and the default password is blanks (no password). If you lose
the password, contact your IBM service representative.
vSNMP read/write protection based on community name.
Reliability and Serviceability
The 8275-416 :
vProvides a comprehensive Power-On Self Test (POST) that ensures that all of its
components are functioning correctly.
vControls a seven-segment LED that allows you to follow the boot sequence.
vAllows you to download software upgrades using any of the management
methods.
vAllows you to implement parallel paths for network traffic through the use of
Spanning Tree Protocol (STP) which provides a level of fault tolerance and
ensures that:
– Redundant paths are disabled when the main paths are operational
– Redundant paths are enabled if the main paths fail
vAllows you to configure a port to “see” traffic going into and out of another port
on the 8275-416 (Port Mirroring).
vProvides statistics for all ports.
Performance
High performance, Layer 2 switching for the 8275-416 consists of:
vSwitching for up to 32 ports
vSupporting up to 12 000 end stations
vProcessing 64-bytes packets at the following rates:
– 14 880 packets per second to 10 Mbps ports.
– 148 800 packets per second to 100 Mbps ports
vDetecting broadcast storms and preventing them from impacting the network
(Broadcast Storm Control).
Year 2000 (Y2K)
The 8275-416 is Y2K ready.
Chapter 1. Introduction 3

When used in accordance with its associated documentation, it is capable of
correctly processing and/or receiving date data within and between the 20th and
21st centuries - providing all other products (for example, hardware, software, and
firmware) used with the 8275-416 properly exchange accurate date data.
For additional information about Year 2000 related topics, visit:
http://www.ibm.com/year2000
Hardware
Cabling Requirements
Ethernet cables are not provided and must be separately purchased. You can order
them through your IBM representative.
Table 1 shows cable type and length requirements. Cable requirements depend on
the speed of the network. Cables and connecting hardware must meet the
standards specified in the ANSI/TIA/EIA 856-A or CSA T529 standards.
Table 1. Ethernet Cable Requirements
Ethernet Type Cable Requirements Max. Cable Length
10BASE-T Category 3, 4, 5, 100-ohm STP/UTP cable 100 m (328 ft)
100BASE-TX Category 5, 100-ohm STP or UTP cable and
connecting hardware 100 m (328 ft)
100BASE-FX 62.5 micron multimode fiber-optic cabling 2 km (6561 ft) at full
duplex; 412 m (1352 ft)
at half duplex
10/100BASE-TX
10BASE-T connections are MDX ports and operate correctly with standard
Category 3, 4, 5, 100-ohm UTP or STP cable and connecting hardware, as
specified in the ANSI/TIA/EIA 856-A or CSA T529 standards when
connected to MDI ports. When connecting to other MDX ports, such as
ports of other 8275-416 switches, you must use crossover cables.
Do not use telephone extension cables in 10/100BASE-TX networks. The
wire pairs in those cables are not twisted and the cables do not meet other
requirements for use in a 10BASE-T network.
For connections to 10/100BASE-TX networks, you can use only Category 5
STP or UTP cables.
100BASE-FX
For connection to 100BASE-FX networks, you can use only 62.5/125 MMF
cabling with MTRJ connectors.
48275-416 User’s Guide

Front Panel
8275-416 LEDs
8275-416 LEDs are located at the lower left corner of the front panel (left of
the single-digit display and are identified with a vertical bar (I), OK, and
Fault. The LED for the vertical bar is Green, as is the OK LED; the Fault
LED’s color is amber. The states of the LEDs are on, off, or blinking, are
explained later in this chapter.
Single-Digit Display
The single digit display is located at the lower left corner of the front panel
as shown in Figure 2 on page 6. During diagnostics, the character displayed
indicates the diagnostic test being executed. Once the 8275-416 is
operational, the character displayed is its Unit ID.
Serial Port (EIA 232)
The serial port is a standard DB-9 male connector that provides an
EIA–232 serial interface (sometimes referred to as the out-of-band
management port). Use a null-modem serial cable when connecting to a
workstation (see “Appendix C. Cable Pinout Diagrams” on page 79). Use a
VT100 terminal emulator program to configure your terminal’s attached
COM port as follows:
v19 200 baud
v8 data bits
v1 stop bit
vNo parity
vHardware flow control OFF
See “Chapter 2. Accessing the 8275-416” on page 11 for more information
about connectivity.
Ethernet 10/100BASE-TX Ports
The 8275-416 has 16 Ethernet 10/100BASE-TX ports. Each port has two
LEDs located at the lower right and left of the connector. Status indications
of the Port LEDs are explained later in this chapter.
Feature Module Slots 1 and 2
These feature modules are available to expand port connections to your
8275-416 :
Figure 1. Front Panel of the 8275-416 .
Chapter 1. Introduction 5

v8-Port 10/100BASE-TX Ethernet Feature Module, IBM P/N 35L2355
v8-Port 100BASE-FX Ethernet Feature Module, IBM P/N 35L2356
8275-416 Status LEDs
8275-416 Status LEDs are shown in Figure 2 and their indications are explained in
the table that follows:
LED Color State Explanation
I Green ON There is power to the 8275-416 and the
power supply is OK.
OFF There is no power is present, or there
is a power supply failure.
OK Green ON The 8275-416 is operational.
OFF The 8275-416 is not operational.
Blinking Operational code or configuration file
transfer is in process.
Fault Yellow ON Indicates a hardware fault.
OFF No hardware fault.
Blinking Diagnostics is in process.
Figure 2. Status LEDs for the 8275-416 .
68275-416 User’s Guide