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Oceniono. / 5. Na podstawie oceny klientów
Using the Spanning Tree Protocol 8 - 3
Understanding Loops
If there is more than one path from one LAN to another, the infrastruc-
ture contains a loop.
If Node A transmits a multicast packet, both Bridge 1 and Bridge 2 will
try and forward the packet to LAN 2. Each Bridge, on seeing the otherÕs
transmission on LAN 2, will forward the packet back to LAN 1. The
cycle will continue and the packet will loop forever taking up all of the
bandwidth of the Bridges.
Topologies containing loops may be more complicated. For example, if
Bridge 2 was replaced by two Bridges with a LAN between them, the
effect would still be the same.
Figure 8.1 - Example Loop on a Bridge Infrastructure
Node A
LAN 1
LAN 2
Bridge 1 Bridge 2
- Technical Reference Manual 1
- Contents 3
- Contents iii 5
- Contents v 7
- Contents vii 9
- Contents ix 11
- List of Figures 12
- List of Tables 13
- Typographical Conventions 16
- Protocols Supported 18
- Radio Characteristics 18
- Radio Ranges 19
- Site Survey 19
- Line of Site 20
- Radio Antenna 21
- Security Features 21
- Terminology 22
- Bridge System Configurations 23
- Part 1 - Getting Started 28
- CHAPTER 1 30
- Ethernet Token Ring 31
- Installation 32
- Ethernet cabling connections 35
- Wireless Bridge 38
- Top Panel Indicators 39
- Accessing the Console System 42
- Access Methods 43
- Using the Console 43
- Sub-Menus 44
- Commands and Information 45
- Are you sure [y/n] : 46
- Telnet Access 47
- Web Access 48
- About the Menus 50
- Enabling Linemode (Linemode) 55
- Monitoring of the DTR Signal 56
- Part 2 - Configuration 58
- Before You Begin 60
- Viewing the Configuration Menu 61
- Before You Begin 3 - 3 62
- Restoring your Configuration 63
- Configuring the Radio Network 64
- Establishing an SSID (SSID) 66
- Basic Rates (Basic_rates) 67
- Enabling Root Mode (Root) 67
- Using the Configuration Radio 68
- IEEE 802.11 Menu 68
- Encapsulation 70
- 90, Source received 90 74
- Setting Diversity (Diversity) 77
- Configuring the Ethernet or 80
- Token Ring Port 80
- Setting Network Identifiers 88
- Entering a Host Route (Host) 92
- Deleting a Route (Delete) 92
- Configuring SNMP 94
- Configuring SNMP 7 - 3 96
- Adding a Community (Add) 97
- Configuring SNMP 7 - 5 98
- Configuring SNMP 7 - 7 100
- CHAPTER 8 102
- Overview 103
- Bridge 1 Bridge 2 104
- How STP Protocol Works 105
- Determining the Spanning Tree 107
- Understanding Bridge Failures 107
- Avoiding Temporary Loops 107
- Establishing Timeouts 108
- Node Address Aging 108
- Implementing STP Protocol 109
- (Root Bridge Only) 110
- Rpriority) 116
- (Repeater Only) 118
- Viewing Statistics 122
- Viewing the Statistics Menu 123
- Viewing Statistics 9 - 3 124
- Error Statistics 126
- Token Ring Error Statistics 126
- Ethernet Error Statistics 128
- Viewing Statistics 9 - 9 130
- Viewing Statistics 9 - 11 132
- Viewing Statistics 9 - 13 134
- CHAPTER 10 136
- Using the Association Menu 138
- BRE105E 22ff0a 142
- Wired LAN 143
- Root Unit 143
- End Node A 143
- End Node B 143
- End Node C 143
- Using Filters 146
- Using the Filter Menu 147
- Displaying The Filters (Show) 148
- Removing a Filter (Remove) 149
- Using Filters 11 - 5 150
- Setting the Default (Source) 151
- Using Filters 11 - 7 152
- Using Filters 11 - 9 154
- Adding A Filter (Add) 156
- Using Filters 11 - 13 158
- Removing an Entry (Remove) 160
- Using Filters 11 - 17 162
- Setting Up Event Logs 164
- Error Logs 168
- Severe Error Logs 168
- Using the Logs Menu 172
- Performing Diagnostics 178
- Using the Diagnostics Menu 179
- Using the Network Menu 180
- Sending a Ping Packet (Ping) 182
- LAN Interfaces Supported 192
- Physical Specifications 193
- Console Port Pin-Out 194
- Ethernet Only 197
- Token Ring Only 197
- Appendix C - SNMP Variables 202
- C.1 MIB II Variables 202
- The System Group 202
- The Interfaces Group 203
- The IP Group 204
- The ICMP Group 205
- The UDP Group 205
- The Transmission Group 206
- The SNMP Group 207
- The Configure STP Group 208
- The Token Ring Group 210
- 3.2 The ARLAN Custom MIB 211
- The Configure Ethernet Group 211
- The Configure ARLAN Group 211
- The Configure Filtering Group 211
- The Configure Console Group 212
- The Configure SNMP Group 212
- The Configure Logs Group 213
- The Configure Ident Group 214
- The Logging Group 214
- The Admin Group 215
- The Admin LinkTest Group 215
- The Admin FTP Group 216
- User’s Guide 218
- Communications 218
- Web Site 218
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