Allied-telesis AT-S79 Manuel d'utilisateur Page 159
- Page / 348
- Table des matières
- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
AT-S79 Management Software User’s Guide
Section I: Using the Menus Interface 159
Table 5 lists the values. The default value is 0.
If two paths have the same port cost and the same priority, then the ports
with the lowest port MAC addresses become the root ports of their
respective bridges.
Hello Time and Bridge Protocol Data Units (BPDUs)
The bridges that are part of a spanning tree domain communicate with
each other using a bridge broadcast frame that contains a special section
devoted to carrying STP or RSTP information. This portion of the frame is
referred to as the bridge protocol data unit (BPDU). When a bridge is
brought online, it issues a BPDU in order to determine whether a root
bridge has already been selected on the network, and if not, whether it has
the lowest bridge priority number of all the bridges and should therefore
become the root bridge.
The root bridge periodically transmits a BPDU to determine whether there
have been any changes to the network topology and to inform other
bridges of topology changes. The frequency with which the root bridge
sends out a BPDU is called the hello time. This is a value that you can set
in the AT-S79 management software. The interval is measured in seconds
and the default is two seconds. Consequently, if an AT-GS950 switch is
selected as the root bridge of a spanning tree domain, it transmits a BPDU
every two seconds.
Point-to-Point and Edge Ports
Part of the task of configuring RSTP is defining the port types on the
bridge. This relates to the device(s) connected to the port. With the port
types defined, RSTP can quickly reconfigure a network when a change in
network topology is detected.
Table 5. Port Priority Value Increments
Port
Priority
Port
Priority
0 128
16 144
32 160
48 176
64 192
80 208
96 224
112 240
- User’s Guide 1
- Contents 3
- Document Conventions 15
- Contacting Allied Telesis 16
- Overview 17
- Management Overview 18
- Local Management Connection 19
- Remote Management Connection 20
- Remote SNMP Management 21
- Management Access Level 22
- AT-GS950/24 Switch 23
- Chapter 1: Overview 24
- Using the Menus Interface 25
- Interface 27
- Enter new subnet mask> 36
- Enter system location> 39
- Enter system contact> 39
- Enter entry number> 42
- Enter new user name> 42
- Enter new password> 42
- Retype new password 44
- Retype new password> 44
- Viewing Switch Information 45
- Rebooting the Switch 48
- Enter new timeout value> 51
- Figure 12. Ping Results 52
- Displaying Statistics 55
- Chapter 4: Port Configuration 60
- Enabling and Disabling a Port 63
- Enter new mode for port 64
- (a/h/H/F/f/t/T)> 64
- Port Trunking Overview 68
- Static Port Trunk Guidelines 69
- (E/D)> 72
- Enter trunk group number> 74
- IGMP Snooping Overview 76
- Setting the Age 80
- Setting Group 80
- Chapter 6: IGMP Snooping 82
- Static Multicast Address 83
- Adding a Static 85
- Multicast 85
- Deleting a Static 86
- Member Port 87
- Port Mirroring Overview 90
- Chapter 8: Port Mirroring 92
- Dial-in User Configuration 95
- Configuring a Dial-in User 97
- Deleting a Dial-in 98
- Modifying a Dial 100
- Virtual LANs 101
- VLAN Overview 102
- Port-based VLANs 103
- Tagged VLANs 103
- Port-based VLAN Overview 104
- Tagged VLAN Overview 105
- Identifier 106
- General Rules for 106
- Creating a 106
- Tagged VLAN 106
- Port VLAN 106
- Creating a VLAN 107
- Chapter 10: Virtual LANs 108
- Changing the 113
- Changing Port 114
- VLAN Type 114
- Displaying the VLANs 115
- Modifying a VLAN 118
- Enter new VLAN name> 119
- Deleting a VLAN 120
- Deleting a Tagged 121
- Chapter 11 123
- SNMP Overview 124
- Community String Attributes 125
- Creating an SNMP Community 128
- Deleting an 130
- Community 130
- Modifying an 131
- Enter community name> 132
- Creating an SNMP Host 133
- Deleting an Host 134
- Host Entry 135
- Enter IP address for host> 136
- Enabling an 137
- SNMP Trap 137
- Deleting a Trap 139
- Receiver 139
- Modifying a Trap 139
- Enabling or 141
- Disabling Traps 141
- Quality of Service (QoS) 143
- QoS Overview 144
- Configuring CoS 150
- Chapter 13 155
- RSTP Overview 156
- Path Costs and Port Costs 157
- Port Priority 158
- Point-to-Point and Edge Ports 159
- Point-to-Point Ports 160
- (Full-duplex Mode) 160
- Mixed STP and 161
- RSTP Networks 161
- Rapid Spanning 162
- Tree and VLANs 162
- Enabling or Disabling RSTP 163
- Enter bridge priority> 166
- Enter bridge hello time> 166
- Enter bridge maximum age> 167
- Configuring STP Compatibility 168
- Configuring the 169
- Basic RSTP Port 169
- Settings 169
- Advanced RSTP 171
- Port Settings 171
- Displaying the RSTP Topology 174
- Bandwidth Control 177
- Bandwidth Control Overview 178
- Configuring Bandwidth Control 179
- Setting the 180
- Ingress Limit 180
- Setting Ingress 180
- DLF Status 181
- Chapter 14: Bandwidth Control 182
- IP Access List 183
- IP Access List Overview 184
- Configuring IP Access List 185
- Adding or 186
- Removing IP 186
- Addresses 186
- Destination MAC Filtering 187
- Destination MAC 189
- Filtering 189
- Removing 190
- Chapter 17 191
- Authentication 193
- Authenticator 193
- Port-based 195
- Network Access 195
- Guidelines 195
- Switch A 197
- Switch B 197
- Guest VLANs 198
- Enter port number> 200
- Enter guest VLAN ID > 201
- Chapter 18 207
- RADIUS Overview 208
- Configuring the RADIUS Client 209
- Management Software Updates 213
- Enter file name> 216
- Enter retry count> 216
- Download file? (Y/N)> 216
- Section II 217
- Chapter 20 219
- Switch’s IP Address 220
- Web Browser Tools 223
- Basic Switch Parameters 225
- Setting Up the IP Access List 228
- Deleting an IP 229
- System Contact 232
- 3. Click Apply 232
- Adding System 233
- Administration 233
- Information 233
- Modifying 234
- Deleting 235
- Viewing System Information 238
- Rebooting a Switch 241
- Pinging a Remote System 243
- Port Configuration 247
- Port Trunking 251
- Creating a Port Trunk 252
- Modifying a Port Trunk 254
- Chapter 23: Port Trunking 256
- Port Mirroring 257
- Configuring Port Mirroring 258
- Disabling Port Mirroring 259
- Chapter 24: Port Mirroring 260
- Chapter 25 261
- Deleting a Group MAC Address 265
- IGMP Snooping 267
- Configuring IGMP Snooping 268
- Chapter 26: IGMP Snooping 270
- Chapter 27 271
- Removing a MAC Address 274
- Chapter 28: Bandwidth Control 278
- Assigning Ports to a VLAN 280
- Creating a Tagged VLAN 281
- Chapter 29: Virtual LANs 282
- Modifying a Tagged VLAN 283
- Deleting a Tagged VLAN 284
- Creating a Port-Based VLAN 285
- Modifying a Port-Based VLAN 286
- Deleting a Port-Based VLAN 287
- Chapter 30 289
- Modifying an SNMP Community 291
- Deleting an SNMP Community 292
- Creating a Host Table 293
- Modifying a Host Table Entry 294
- Deleting a Host Table Entry 295
- Enabling or Disabling Traps 296
- Modifying Traps 297
- Deleting Traps 298
- Chapter 32 305
- Basic RSTP Configuration 306
- Viewing the RSTP Topology 313
- Chapter 33 315
- Dial-in User 319
- Adding a Dial-in User 320
- Modifying a Dial-in User 321
- Deleting a Dial-in User 322
- Chapter 35 323
- Statistics 325
- Displaying Switch Statistics 326
- Chapter 36: Statistics 328
- Displaying Error 330
- Group Statistics 330
- Displaying 332
- Historical Status 332
- Appendix A 341
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