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3Com SuperStack II Guide
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5
P
ORT
T
RU
NKS
Port
trunks
are c
onnectio
ns that all
o
w d
evice
s
t
o communicate
usin
g up
to
fo
u
r
lin
ks
in
p
ar
al
l
el.
This cha
pter expla
ins more abou
t port trunk
s
an
d how to
se
t them
u
p on
yo
ur
ne
tw
o
rk.
It
co
ve
rs
th
e
foll
ow
i
ng
to
pi
cs:
â–
What ar
e Por
t T
runks?
â–
Por
t T
r
unks an
d Y
our S
witch
â–
Pl
acing Po
rts i
n a Port T
runk
â–
Port
T
runk Examp
le
156
158
Table of Contents
Default Chapter
3
Default Chapter
3
Table of Contents
3
About this Guide
13
Conventions
13
Related Documentation
15
Year 2000 Compliance
15
Documentation Comments
16
Product Registration
16
I Getting Started with Management
17
1 Super Stack II Switch Management Software
19
What Is Management Software
20
Summary of Software Features
20
Software Features Explained
21
Stack Management
21
Forwarding Modes
21
Duplex Modes
22
Flow Control
23
Traffic Prioritization
23
Pace
24
Security
24
Resilient Links
25
Port Trunks
25
Broadcast Storm Control
26
Virtual Lans
26
Fastip
26
Multicast Filtering
27
Spanning Tree Protocol
27
Rmon
27
Roving Analysis
28
Management
28
Default Settings
29
2 Setting U P for Management
31
Methods of Managing a Switch
32
Setting up Web Interface Management
33
Setting up through the Console Port
33
Setting up over the Network
34
Installing Online Help and Documentation
34
Choosing a Browser
35
Configuring the Browser
35
Setting up Command Line Interface Management
36
Setting up through the Console Port
36
Setting up over the Network
37
Setting up SNMP Management
37
Managing a Switch over the Network
38
IP Addresses
38
Obtaining a Registered IP Address
38
Subnets and Using a Subnet Mask
39
Logging in as a Default User
39
The Management Interfaces
41
3 Working with the Web Interface
43
Accessing the Web Interface
44
Exiting the Web Interface
45
The Getting Started Pages
46
The Main Web Interface
48
The External Link Icons
49
The Management Icons
50
The Page Area
50
Navigating the Page Area
52
Making Changes in the Page Area
53
Configuring the Current Switch
54
Displaying the Status of the Ports
54
Displaying the Color Codes Used by the Switch Graphic
54
Displaying the Speed and Duplex Mode of Ports
55
Refreshing the Switch Graphic
55
Displaying Administration Details
56
Setting up IP Information
58
Configuring a Port
59
Configuring the Console Port
66
Changing the Management Settings for the Stack
67
Specifying a Descriptive Name
67
Changing Your Password
68
Accessing the Getting Started Pages
69
Specifying a Physical Location
69
Specifying the Location of the Online Help and Documentation
70
Specifying Contact Details
71
Configuring the Stack
71
Configuring the Switch Database
72
What Is the Switch Database
72
Displaying the Switch Database
73
Inserting Permanent Entries
74
Deleting Entries
75
Configuring the Advanced Stack Settings
76
Setting up Resilient Links
79
What Are Resilient Links
79
Creating a Resilient Link Pair
80
Displaying Resilient Link Pairs
80
Deleting a Resilient Link Pair
81
Setting up Port Trunks
81
Swapping the Active Port of a Resilient Link Pair
81
Displaying the Ports that Belong to each Port Trunk
82
Placing Ports in a Port Trunk
82
What Are Port Trunks
82
Configuring Vlans
83
Defining VLAN Information
84
Editing VLAN Information
84
What Are Vlans
84
Deleting VLAN Information
85
Displaying the Ports that Belong to each VLAN
85
Placing Ports in Multiple Vlans Using 802.1Q Tagging
85
Placing Ports in Multiple Vlans Using VLT Tagging
85
Placing Ports in Single Vlans
85
Setting up Roving Analysis Ports
86
Defining Monitor Ports and Analysis Ports
87
What Is Roving Analysis
87
Enabling the Roving Analysis System
88
Resetting All the Units in the Stack
88
What Happens During a Reset
88
Initializing All the Units in the Stack
88
What Happens During an Initialization
88
Upgrading Management Software
89
Displaying Statistics for the Current Switch
91
Displaying Unit Statistics
91
Interpreting the Statistics
92
Displaying Port Statistics
92
Interpreting the Statistics
94
4 Working with the Command Line Interface
95
Accessing the Interface
96
Exiting the Interface
96
How Many Users Can Access the Interface
97
About the Interface Menus
97
Entering Commands
99
Displaying Menus
100
Obtaining Help
100
A Quick Guide to the Commands
101
Displaying and Changing Bridging/Vlans Information
105
Setting the Bridge Address Aging Time
105
Displaying Bridge Information
105
Enabling and Disabling IGMP Snooping
107
Enabling and Disabling Router Port Auto-Discovery
108
Manually Identifying a Router Port
108
Displaying All Router Ports
108
Removing a Router Port
109
Adding a Statically Configured Address to a Switch Database
110
Finding a MAC Address
110
Displaying MAC Addresses for a Port
111
Removing MAC Addresses from a Port
111
Displaying Port Information
111
Setting the Spanning Tree Path Cost
112
Enabling and Disabling Spanning Tree Fast Start
112
Displaying Port Summary Information
113
Enabling and Disabling VLT Tagging on a Port
114
Setting the Bridge Spanning Tree Forward Delay
114
Setting the Bridge Spanning Tree Hello Timer
115
Setting the Bridge Spanning Tree Maximum Age
115
Setting the Spanning Tree Bridge Priority
115
Adding a Port to a VLAN
116
Creating a VLAN
116
Enabling and Disabling Spanning Tree on a Bridge
116
Deleting a VLAN
117
Displaying Detailed VLAN Information
117
Modifying a VLAN
118
Displaying Summary VLAN Information
119
Removing a Port from a VLAN
119
Displaying and Changing Port Information
120
Enabling and Disabling Ports
120
Enabling and Disabling Auto-Negotiation
121
Specifying the Speed and Duplex Mode
121
Displaying Port Statistics
123
Enabling and Disabling Flow Control
123
Displaying Port Summary Information
126
Packet Size Analysis
126
Displaying and Changing System Feature Information
127
Displaying the Roving Analysis Port Information
127
Setting up a Roving Analysis Port
127
Removing a Roving Analysis Port
128
Starting Data Monitoring
128
Enabling and Disabling Broadcast Storm Control
129
Stopping Data Monitoring
129
Displaying Resilient Link Information
130
Setting up a Resilient Link
130
Adding a Port to a Trunk
131
Removing a Resilient Link
131
Swapping over Active Links
131
Displaying Detailed Trunk Information
132
Removing a Port from a Trunk
132
Displaying Summary Trunk Information
133
Displaying and Changing IP-Related Information
133
Specifying IP and SLIP Information
133
Displaying IP and SLIP Information
135
Enabling and Disabling BOOTP
135
Pinging Other Devices
136
Resetting the IP Configuration
136
Displaying and Changing SNMP-Related Information
137
Specifying SNMP Community Strings
137
Specifying Trap Destination Details
137
Displaying Trap Destination Details
138
Modifying Trap Destination Details
138
Removing Trap Destination Details
139
Performing an SNMP GET Command
139
Performing an SNMP GETNEXT Command
139
Performing an SNMP SET Command
140
Displaying and Changing Stack Information
141
Moving the Focus of the Command Line Interface
141
Returning the Focus to the Previous Switch Unit
142
Specifying Stack Administration Details
142
Displaying Switch Administration Details
143
Displaying Stack Summary Information
144
Configuring Intelligent Modules
146
Displaying Module Configuration
146
Enabling and Disabling the Module Interface
146
Setting Module Configuration
146
Changing Your Password
147
Specifying User Details
147
Displaying User Details
148
Modifying User Details
148
Removing User Details
149
Displaying Access Rights
149
Modifying Access Rights
150
Enabling and Disabling Remote Access
150
Resetting All the Units in the Stack
151
What Happens During a Reset
151
Initializing All the Units in the Stack
152
What Happens During an Initialization
152
Upgrading Management Software
153
Management Reference
155
5 Port Trunks
157
What Are Port Trunks
158
Port Trunks and Your Switch
158
Placing Ports in a Port Trunk
159
Port Trunk Example
160
6 Virtual Lan S (Vlan S )
163
What Are Vlans
164
Benefits of Vlans
164
Vlans and Your Switch
165
The Default VLAN
165
Defining New Vlans
166
Untagged and Tagged Vlans
166
Placing a Port in a Single VLAN
166
Placing a Port in Multiple Vlans
166
802.1Q Tagging
166
Using IEEE 802.1Q Learning
167
VLT Tagging
167
Forwarding Traffic Containing Unknown 802.1Q Tags
168
Connecting to Vlans on Legacy Switch Units
170
Connecting Vlans to Other Vlans
170
VLAN Configuration for Beginners
171
Simple Example: Using Untagged Connections
171
Simple Example: Untagged Connections with Hubs
172
Simple Example: 802.1Q Tagged Connections
174
VLAN Configuration - Advanced Examples
177
Using 802.1Q Tagged Connections and 802.1Q Learning
177
Connecting to a Legacy Network
178
7 Fast Ip
181
What Is Fastip
182
How Fastip Works
182
An Example
183
Fastip and the Switch Database
186
Enabling Fastip
187
8 Multicast Filtering
189
What Is a Multicast
190
What Is Multicast Filtering
190
Multicast Filtering and Your Switch
191
IEEE 802.1P Multicast Filtering
191
Enabling 802.1P Multicast Learning
191
IGMP Multicast Filtering
192
Enabling IGMP Multicast Learning
192
Manual Filtering
192
9 Spanning Tree Protocol
193
What Is STP
194
How STP Works
196
STP Requirements
196
STP Calculation
197
STP Configuration
197
STP Reconfiguration
197
An Example
198
STP Configurations
199
Using STP on a Network with Multiple Vlans
201
Connecting to STP Systems on Legacy Switch Units
202
Enabling STP
202
10 Rmon
203
What Is RMON
204
The RMON Groups
204
Alarms
204
History
204
Statistics
204
Events
205
Hosts
205
Hosts Top N
205
Matrix
205
Benefits of RMON
206
RMON and Your Switch
207
The Alarm Events
208
The Default Alarm Settings
208
The Audit Log
209
Problem Solving
211
11 Problem
211
Solving Web Interface Problems
214
Solving Command Line Interface Problems
216
Solving SNMP Management Software Problems
218
Solving Serial Web Utility Problems
219
Solving Management Software Upgrade Utility Problems
220
Solving Other Problems
221
Appendices and Index
225
A Serial Web Utility
225
Introduction
227
Installing the Serial Web Utility
227
Using the Serial Web Utility
229
Software Upgrade Utility
231
Using the Upgrade Utility
231
Glossary
233
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3Com SuperStack II Specifications
General
Brand
3Com
Model
SuperStack II
Category
Switch
Language
English
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