3com TR User Manual Page 65
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- Table of contents
- TROUBLESHOOTING
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Port Configuration 4-7
identified by their VLAN ID. All ports are configured
by default to VLAN 1.
1 Set this field by entering the desired VLAN number for
the current port.
2 Press [Return].
Setting Port Personality
Ports 1 through 4 on the Switch 2000 TR can be set
to *Adapter* or *Hub*. In “adapter” mode, the port
can connect to a token ring hub such as a SuperStack
II Hub TR. In “hub” mode, the port acts like a hub
port and can support a directly-connected worksta-
tion or server. Ports 5 through 12 support “adapter”
mode only.
An external adapter cable can be used to directly
attach workstations to ports 5 through12.
1 Set this field by toggling the [Space Bar] to your
choice.
2 Press [Return].
Setting Port Priorities
Switch 2000 TR has two fields for setting priority:
■ Internal Priority—The Internal Priority field allows
you to distribute the available bandwidth among
the ports. High-priority ports are given priority
access to internal resources, taking priority over
Normal priority ports. Settings are High or Normal.
■ Token Priority—The Token Priority field deter-
mines the priority of a token ring port on the
Switch 2000 TR when transmitting to a segment.
For example: In Normal-priority a token level of 4 is
reserved and all packets are transmitted with a token
priority of 4 or higher, if necessary. In High-priority
mode, a token level of 6 is reserved and all packets
are transmitted with a token priority of 6 or higher, if
necessary.
If Token Priority is disabled on a port, then packets are
transmitted from that port with the priority token
that is available at the time. Token Priority is turned
off if disabled.
1 Set this field by toggling the [Space Bar].
2 Press [Return].
Setting Congestion Control
Congestion Control provides a method for determin-
ing how the Switch 2000 TR reacts in high-traffic load
scenarios. Rather than discarding packets, this unique
feature allows you to control the flow of traffic by
assigning alternate methods for traffic handling.
Choices:
■ Flow Control—Flow Control allows you to elimi-
nate frame loss by buffering excess frames at the
end station where space is available until the
Switch 2000 TR’s buffers are free. Once the buffers
on the Switch 2000 TR are free, the end station’s
buffers are emptied to the Switch 2000 TR and
packet loss is eliminated.
■ Non-blocking—Non-blocking is the factory
default state. In this mode frames are forwarded to
available destination rings. This occurs even if a
frame has been buffered due to a busy or down
- Version 4.0 1
- ANAGEMENT 4
- VT100 I 5
- Related Publications 10
- About the SuperStack 11
- II Switch 2000 TR 11
- System Features 12
- Summary of Features 13
- 1-4 CHAPTER 1: OVERVIEW 14
- Ring Segmentation 15
- The Front Panel 16
- RJ-45 Ports 17
- Front Panel LEDs 17
- LCD Display Buttons 17
- The Rear Panel 18
- Optional Slide-In Modules 19
- The FDDI Module 20
- 1-12 CHAPTER 1: OVERVIEW 22
- SuperStack II Switch 1000 TX 23
- Token Ring Switching Concepts 24
- Transparent Bridging (TP) 25
- Spanning Tree 26
- Congestion Control 27
- Forwarding Modes 27
- 1-18 CHAPTER 1: OVERVIEW 28
- GETTING STARTED 29
- Considerations for Placement 30
- Configuration Guidelines 31
- Power Supply and Fuse 31
- Replacing the Fuse 31
- HAPTER 2: GETTING STARTED 32
- Installing the Switch 2000 TR 33
- Connecting to the Serial Port 34
- Device Defaults 34
- Stack Defaults 35
- Bridge Defaults 35
- SETTING UP FOR MANAGEMENT 37
- VT100 Management Interface 38
- Via the Serial Port 38
- Via an IP Network Connection 38
- Unit ID # 39
- Head Unit 39
- Managing over the Network 40
- Management Prerequisites 41
- Source Routing Prerequisites 42
- The VT100 Console 42
- Key Board Shortcuts 43
- Correcting Text Entries 44
- Default Users 44
- VT100 Console Menu Map 45
- Setting Up the VT100 Console 46
- ■ Device IP Address 47
- Unit Id. 1 49
- LCD Console Menu Map 50
- Setting Up BOOTP 52
- Setting Up BOOTP 3-17 53
- Auto Logout 54
- Upgrading Software 55
- Upgrading Module Software 56
- Resetting the Switch 2000 TR 57
- Reset Button 58
- Power Cycle Reset 58
- Quick Setup 60
- Bridge Configuration 61
- Setting Source Route Bridging 62
- Setting Transparent Bridging 62
- Spanning Tree Fields 63
- Port Configuration 64
- Setting Port Personality 65
- Setting Port Priorities 65
- Setting Congestion Control 65
- Setting Port Speed 66
- Setting Forwarding Mode 66
- Dynamic Cut-Thru Threshold% 66
- Port Bridge Configuration 68
- I/O Module Configuration 69
- Stack Configuration 69
- VLAN Configuration 70
- Unit Configuration 72
- Administrative Configuration 73
- Setting Local Security 74
- Creating New Users 75
- Deleting Users 75
- Database Entries 77
- Database Entry Methods 77
- Switch Database Configuration 78
- SNMP Trap Configuration 79
- Serial Port Configuration 80
- Serial Port Configuration 4-23 81
- > Port 85
- Setting Port State 86
- Setting Speed 86
- > I/O Module 88
- MONITORING THE SWITCH 2000 TR 89
- Unit Statistics 90
- Port Statistics 91
- Port Statistics (Traffic) 92
- Port Statistics 6-5 93
- Stack Status 94
- Status 6-7 95
- Fault Log 96
- Remote Polling (PING) 97
- LCD Status 98
- VIRTUAL LANS 99
- Benefits of VLANs 100
- VLANs and the Switch 2000 TR 101
- HAPTER 7: VIRTUAL LANS 102
- Switch 2000 TR 103
- 7-6 CHAPTER 7: VIRTUAL LANS 104
- SOFTWARE UPGRADE UTILITY 105
- S (address) 106
- M (subnet mask) 106
- Using the Commands 107
- Status Messages 108
- SCREEN ACCESS RIGHTS 109
- SERIAL PORT CABLE PIN-OUTS 111
- TROUBLESHOOTING 113
- PPENDIX D: TROUBLESHOOTING 114
- SWITCH 2000 TR 115
- SPECIFICATIONS 115
- TECHNICAL SUPPORT 117
- PPENDIX F: TECHNICAL SUPPORT 118
- Support from 3Com 119
- Returning Products for Repair 120
- LIMITED WARRANTY 125
- 764-5000 126
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