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3
A
DVANCED
B
RIDGING
This cha
pter contain
s the fol
lowing
topics:
■
Spa
nning
T
re
e Con
figurati
on
■
Custo
m Filter Co
nfigur
ation
1
2
...
96
97
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...
227
228
Part No. DUA1860-0AAA01
1
Published November 1994
1
■ Santa Clara, California ■
2
How To Use This Guide
10
Conventions
11
Special Messages
12
Related Publications
13
NTRODUCTION
15
The LinkBuilder MSH
16
Figure 1-2
17
The Network Segments
17
Figure 1-3
19
The Module’s LEDs
19
Managing The Bridge
21
Why Use A Bridge?
22
Local And Remote Bridges
23
Bridge Network Topology
24
Bridging 1-11
25
Figure 1-9
25
An Example Topology
25
Figure 1-10 Frame Contents
26
Bridging 1-13
27
Figure 1-11
27
An Example Network
27
Figure 1-12
27
Learns A, Passes On Packet
27
Bridging 1-15
29
Bridging 1-17
31
Figure 1-16
31
Bridge Port Blocking
31
, leading to quick
32
Bridging 1-19
33
Figure 1-18
33
Network Resilience
33
What Is Custom Filtering?
34
Bridge Filters 1-21
35
Figure 1-19
35
Figure 1-20
35
Forwards Packet
35
Figure 1-21 Filters Packet
36
Filter Sets
37
Bridge Filters 1-25
39
Figure 1-23
39
Bridge Filters 1-27
41
Enabling Custom Filtering
43
Installation And Removal
45
The VT100 Bridge Screens
50
The VT100 Bridge Menu Map
52
The VT100 Bridge Menu Map 2-7
53
Bridge Control Keys
54
Simple Bridge Configuration
57
Figure 2-4
59
LinkBuilder MSH Logon Screen
59
Figure 2-6
61
. If the bridge's
62
Select MANAGE to continue
62
Logging On To The Bridge
63
Figure 2-9 Main Menu
64
Figure 2-10
65
Configuration Menu
65
Account Number:
67
Accounts screen appears
67
Adding Bridge Information
70
Figure 2-14 Bridge Reset
72
Erasing All Changes
73
Logging Off The Bridge
74
IP Address Configuration
75
Bridge Connections
76
Setting Up Remote Access
77
IP Address Configuration 2-33
79
Figure 2-17
79
Static Routes
79
IP Address Configuration 2-35
81
Figure 2-18 IP Host Table
82
IP Address Configuration 2-37
83
IP Address Configuration 2-39
85
Figure 2-19
85
Ping Settings
85
Figure 2-20 Ping
86
IP Address Configuration 2-41
87
IP Address Configuration 2-43
89
Figure 2-21
89
Remote Connect
89
Figure 2-22 Chat
90
IP Address Configuration 2-45
91
Figure 2-23
91
Terminate Connection
91
Community Administration
92
SNMP Configuration 2-47
93
SNMP Configuration 2-49
95
Configuring Community Traps
97
SNMP Configuration 2-53
99
DUA1860-0AAA01
100
Spanning Tree Configuration
101
Custom Filter Configuration
101
Introduction
102
Figure 3-1
103
Spanning Tree
103
Figure 3-2 Port Settings
106
Figure 3-3 Host-to-Host
110
Figure 3-4
113
Host-to-Port
113
Figure 3-5 Port-to-Port
116
Figure 3-6 Multicast
118
Figure 3-7 Protocol Filters
120
Setting Up A Bit Filter
123
0 6 12 14
125
The Host Filtering Table
127
Figure 3-11 Filter Options
130
ONITORING
133
Checking Bridge Statistics
135
Learning
137
Checking Port Activity
140
Checking Port Activity 4-9
141
Listening
142
Checking Port Activity 4-11
143
Viewing Ethernet Statistics
144
Checking User Access
148
Display Field. The number of
149
ONFIGURATION
151
General Help
152
Downloading Software Upgrades
153
Configuration 5-5
155
Figure 5-3
155
Changing Download Parameters
155
The Permanent Database
156
Configuration 5-7
157
Configuration 5-9
159
Figure 5-6
159
Transfer Permanent Entries
159
Editing ARP Information
160
Configuration 5-11
161
Figure 5-8
161
Add ARP Entry
161
Changing TCP Characteristics
163
Configuration 5-15
165
Port Queuing
166
Monitoring
167
Figure 5-14
169
Note Table By Address
169
Link BAD
172
Viewing Socket Statistics
173
FIN_WAIT_1
175
LAST_ACK
175
FIN_WAIT_2
175
TIME_WAIT
175
Viewing UDP Statistics
176
Viewing UDP Statistics 5-27
177
Viewing TCP Information
178
Viewing UDP Statistics 5-29
179
Viewing UDP Statistics 5-31
181
Figure 5-20
181
TCP Connection Statistics
181
Viewing IP Statistics
183
Viewing UDP Statistics 5-35
185
Viewing UDP Statistics 5-37
187
Viewing SNMP Information
189
Viewing UDP Statistics 5-41
191
Viewing ARP Tables
193
Viewing UDP Statistics 5-45
195
Figure 5-26
195
Error Log
195
Viewing UDP Statistics 5-47
197
Figure 5-28
197
Clear Error Log
197
Spot Checks
200
Correcting Problems
202
Correcting Problems 6-5
203
Correcting Problems 6-7
205
Spares 6-9
207
Figure 6-1
207
The Location of the Fuse
207
What To Do Next
208
Figure A-1
209
The Location Of The Link
209
ECHNICAL
211
NFORMATION
211
IETF Bridge MIB (RFC 1286)
212
Ask3Com on CompuServe
214
3Com Documentation on CD-ROM
215
Support from 3Com
216
Returning Products for Repair
217
Numerics
219
REQUENCY
225
NTERFERENCE
225
TATEMENTS
225
Information To The User
226
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