HP Transcend Traffix Manager Manual de usuario Pagina 157
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H
DHCP
This appendix contains the following sections:
■ How Traffix Manager Monitors DHCP Devices
■ What Effect Do DHCP Devices Have On The Map?
How Traffix
Manager Monitors
DHCP Devices
Traffix
™
Manager normally uses the Network Layer Address (for example,
IP address, IPX address) as the unique way to identify objects on your
network. However, the IP address of devices managed using the Dynamic
Host Control Protocol (DHCP) can change, and therefore this is an
unreliable method of identification for these devices.
The only certain way of identifying such devices in the Map is to use the
MAC address of the device. You can use the DHCP configuration file to
specify which devices you want Traffix Manager to identify using this
method. You can open this file by clicking DHCP Setup in the Traffix
Control Panel.
What Effect Do
DHCP Devices Have
On The Map?
If a device which is managed using DHCP is discovered on your network,
it may appear on the Traffix Manager Map as a normal device until Traffix
Manager realizes it is a DHCP device.
A DHCP device requests an IP address from the DHCP server. DHCP is a
dynamic protocol, and the DHCP server can provide a different IP address
for the same device each time this request is made. If, according to your
local DHCP policy, the IP address of a device changes, the device will
appear exactly the same in the Map, except that its IP address will
change.
If the old IP address of a device is assigned to a new MAC address, a new
device is created in the Map. This new device will have the old IP address
and the new MAC address attribute assigned to it. The original device
- Transcend 1
- User Guide 1
- 3Com Corporation 2
- 5400 Bayfront Plaza 2
- Santa Clara, California 2
- 95052-8145 2
- CONTENTS 3
- 3 COLLECTING DATA 4
- 9 USING EVENT RULES 5
- 10 VIEWING EVENTS 6
- 11 OVERVIEW OF REPORTING 6
- 12 REPORT TYPES 7
- C AGGREGATING DEVICES 8
- D USING THE SUBNETSDB FILE 8
- F SUPPORTED RMON-2 DEVICES 8
- I USING RMON-1 AGENTS 9
- K TECHNICAL SUPPORT 9
- ABOUT THIS GUIDE 11
- BOUT THIS GUIDE 12
- Table 2 Notice Icons 13
- Table 3 Text Conventions 13
- Terminology Used 14
- Related 14
- Documentation 14
- Comments 15
- Year 2000 16
- Compliance 16
- GETTING STARTED WITH TRAFFIX 17
- TRAFFIX MANAGER OVERVIEW 19
- Features of Traffix 20
- How Does Traffix 21
- Manager Work? 21
- Strategy for New 23
- LAUNCHING TRAFFIX MANAGER 25
- THE FIRST TIME 25
- Stopping Traffix 28
- About the Main 28
- Main Window 29
- Reference 29
- HOW TRAFFIX MANAGER WORKS 33
- COLLECTING DATA 35
- 36 CHAPTER 3: COLLECTING DATA 36
- RMON Overview 37 37
- How Traffix 38
- Manager Discovers 38
- Network Devices 38
- Using RMON-2 38
- GROUPING NETWORK DEVICES IN 39
- ■ The MAC address matches a 41
- Groupings 43 43
- ■ NL Type 44
- ■ Subnet 44
- Groupings 45 45
- RUNNING TRAFFIX MANAGER 47
- AFTER THE FIRST TIME 49
- CONFIGURING AGENTS FOR DATA 51
- COLLECTION 51
- Finding Agents for 52
- Data Collection 52
- MAIN WINDOW 57
- Working with 58
- Objects in the Main 58
- Displaying Network 59
- Traffic Data 59
- Protocols 61
- Applications and 61
- Favorites 61
- TCP port 63
- DISPLAYING TRAFFIC IN GRAPHS 65
- Using the Graph 66
- Using the Launch 67
- Graph Dialog Box 67
- USING EVENT RULES 71
- Predefined Event 72
- Examples of Event 73
- HAPTER 9: USING EVENT RULES 74
- Configuring Event 75
- Using Event Rules 77 77
- Using Event Rules 79 79
- VIEWING EVENTS 81
- Figure 12 Event List 82
- Figure 13 Filter dialog box 83
- 84 CHAPTER 10: VIEWING EVENTS 84
- Viewing and 85
- Managing Selected 85
- Forwarding Events 86
- 88 CHAPTER 10: VIEWING EVENTS 88
- OVERVIEW OF REPORTING 89
- 00:00 12:00 24:00 90
- Raw data 90
- Overview 91 91
- Figure 17 Report Manager 92
- Managing Reports 93 93
- Managing Reports 95 95
- Strategy for 97
- Reporting 97
- Effects of Grouping 98
- REPORT TYPES 99
- Connection Activity 100
- Device Activity 101
- Group Activity 102
- Segment Activity 103
- HAPTER 12: REPORT TYPES 104
- Top N Connections 105
- Top N Devices 107
- Top N Groups 109
- Top N Segments 110
- APPENDICES AND INDEX 113
- TROUBLESHOOTING TRAFFIX 115
- Troubleshooting 116
- DATABASE MANAGEMENT USING 121
- TRAFFIX CONTROL PANEL 121
- Overview of 122
- Database 122
- Applications 122
- Upgrading Traffix 126
- Manager 2.0 126
- 3Com directory using 127
- AGGREGATING DEVICES 129
- Default Aggregation 131 131
- and office.acme.com 131
- USING THE SUBNETSDB FILE 133
- Table 18 Subnet Masks 134
- Using the SubnetsDB File 135 135
- AUTOMATIC ATTRIBUTE 137
- ASSIGNMENT 137
- Contents of the 138
- User-defined 138
- Attributes 138
- Configuration File 138
- Performing 140
- Attribute 140
- Assignment 140
- Using the fileattrs 140
- Using the dblookup 142
- Table 19 lookup_2 143
- Writing your own 145
- Table 20 Example Programs 147
- AttrLooktest.exe in 150
- SUPPORTED RMON-2 DEVICES 151
- CONFIGURING 3COM 153
- STANDALONE RMON-2 AGENTS 153
- Setting the 154
- Operational Mode 154
- Standalone 154
- RMON-2 Agents 154
- 158 CHAPTER H: DHCP 158
- USING RMON-1 AGENTS 159
- RMON AND SNMP TABLES 161
- RETRIEVAL 161
- TECHNICAL SUPPORT 163
- PPENDIX K: TECHNICAL SUPPORT 164
- ■ Hostname: ftp.3com.com 164
- ■ Username: anonymous 164
- Support from Your 165
- Network Supplier 165
- ■ Diagnostic error messages 166
- Returning Products 167
- GLOSSARY 169
- 170 GLOSSARY 170
- GLOSSARY 171 171
- 172 GLOSSARY 172
- GLOSSARY 173 173
- 174 GLOSSARY 174
- NDEX 177 177
- NDEX 179 179
- NDEX 181 181
- NDEX 183 183
- 184 INDEX 184
- Traffix 185
- Manager 3.0 for Windows NT 185
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