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AT-GS950/16 Web Interface User Guide
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Egress Queue vs
Packet Priority
Mapping
Each port has four egress queues, labeled Low, Medium, High, Highest.
Low is the lowest priority queue and Highest is the highest. A packet in a
high-priority egress queue is typically transmitted sooner than a packet in
a low-priority queue.Table 2 lists the default mappings between the eight
CoS priority levels and the four egress queues of a switch port.
You can change these mappings. For example, you might decide that
packets with a priority of 6 and 7 need to be handled by egress queue
Highest and packets with a priority of 2 and 3 should be handled in
Medium. The result is shown in Table 3.
Table 2. Default Mappings Priority Levels to Priority Queues
IEEE 802.1p
Priority Level
Port Priority
Queue
0 Low
1 Low
2 Low
3 Low
4 Low
5 Low
6 Low
7 Low
Table 3. Customized Mappings Priority Levels to Priority Queues
IEEE 802.1p
Priority Level
Port Priority
Queue
0 Low
1 Low
2 Medium
3 Medium
4High
5High
6 Highest
7 Highest
- AT-GS950/16 1
- Contents 10
- List of Figures 11
- List of Tables 15
- Document Conventions 18
- Getting Started 21
- Chapter 1 23
- Switch’s IP Address 24
- Switch Info 25
- Front Panel 25
- Web Browser Tools 27
- System Configuration 29
- System Management Information 30
- IPv6 System Configuration 34
- IPv6 Neighbor Configuration 36
- Neighbor Entry 37
- Find an IPv6 37
- Neighbor 37
- IP Access List Configuration 40
- Delete an IP 41
- Address List 41
- Add New User 42
- Name and 42
- Password 42
- Modify User 43
- Delete User Name 44
- User Interface Configuration 45
- User Interface 46
- System Time 47
- Setting Daylight 49
- Parameters 49
- SSL Settings 50
- DHCP Client Configuration 53
- Activate or 54
- Deactivate DCHP 54
- DHCP Auto Configuration 56
- System Information Display 57
- Hardware Information Section: 58
- IPv6 Information Section: 58
- System Log Configuration 60
- Bridge Configuration 63
- Port Configuration 65
- Chapter 3: Port Configuration 68
- STP and RSTP 71
- Bridge Priority 73
- Path Costs and Port Costs 74
- Port Priority 74
- Forwarding 75
- Delay and 75
- Topology 75
- Point-to-Point and Edge Ports 76
- Mixed STP and 78
- RSTP Networks 78
- Spanning Tree 78
- Chapter 4: STP and RSTP 80
- STP and RSTP Global Settings 81
- STP and RSTP Port Settings 84
- Chapter 5 87
- MSTP Global Settings 88
- Generic MSTP Port Settings 91
- MST Settings 94
- MST Port Settings 96
- Instance Information 98
- Static Port Trunking 99
- Overview 100
- General Guidelines 101
- Create a Port Trunk 103
- Modify a Port Trunk 105
- Disable a Port Trunk 107
- LACP Port Trunks 109
- System Priority 111
- Port Priority Value 112
- Chapter 7: LACP Port Trunks 114
- Group Status 115
- Configuration 116
- Port Priority Configuration 118
- Port Mirroring 119
- Port Mirroring Configuration 121
- Chapter 8: Port Mirroring 122
- Disable Port Mirroring 123
- Loopback Protection 125
- MAC Address Table 129
- Chapter 10: MAC Address Table 132
- Modify Static Unicast Address 134
- Delete Static Unicast Address 135
- IGMP Snooping 141
- IGMP Snooping Configuration 144
- Chapter 11: IGMP Snooping 146
- Storm Control 149
- Ingress Rate 151
- Limiting 151
- Egress Rate 151
- Ingress Rate Limiting 154
- Egress Rate Limiting 156
- Virtual LANs 157
- VLAN Overview 158
- Port-based 159
- Tagged VLAN 160
- VLAN Index 161
- VLAN Name 161
- Tagged and Untagged Ports 161
- Private VLAN 162
- Forwarding Ports 163
- Source Port 163
- Assign Ports to a VLAN Mode 164
- Tagged VLAN Configuration 166
- Modify a Tagged 168
- Delete a Tagged 170
- Tagged VLAN Port Settings 171
- Chapter 13: Virtual LANs 172
- Port-Based VLAN Configuration 173
- Modify a Port 174
- Based VLAN 174
- Delete a Port 175
- View Dynamic Forwarding Table 177
- Private VLAN Configuration 179
- Create a Private 180
- Modify a Private 181
- Delete a Private 181
- View Current VLAN Database 182
- Port-Based VLAN table: 183
- VLAN Index - VLAN ID numbers 183
- VLAN Name - VLAN names 183
- Chapter 14 185
- Overview and Guidelines 186
- General Configuration 187
- Port Settings 188
- Time Settings 190
- Chapter 14: GVRP 192
- Chapter 15 193
- Egress Queue vs 195
- Packet Priority 195
- Prioritizing 196
- Untagged Packets 196
- Queue Scheduling Algorithm 203
- IPv6 Traffic Class Mapping 204
- Create IPv6 205
- Traffic Class 205
- Delete an IPv6 206
- Advanced Features 207
- SNMPv1 and v2c 209
- SNMPv1 and SNMPv2c Overview 210
- Trap Receiver Attributes 211
- Activate SNMP Interface 212
- Create User and 213
- Group Names 213
- Chapter 16: SNMPv1 and v2c 214
- Modify User and 215
- Delete User and 215
- SNMP Community Strings 216
- SNMP Traps 219
- Modify a Trap 220
- Host Table Entry 220
- Delete a Trap 221
- Chapter 17 223
- SNMPv3 MIB 225
- SNMPv3 Privacy 225
- Protocol 225
- SNMPv3 User and Group Names 228
- Modifying 229
- SNMPv3 User 229
- Deleting SNMPv3 230
- User and Group 230
- SNMPv3 View Names 231
- Chapter 17: SNMPv3 232
- SNMPv3 View 233
- View Names 233
- SNMPv3 View Table 234
- SNMPv3 Traps 237
- SNMP Engine ID 238
- Access Control Configuration 241
- Policy Settings 243
- Change a Policy 247
- View Specific 249
- Classifier Details 249
- Rate Control Settings 251
- Modify the 252
- Committed Rate 252
- Delete a Rate 253
- Control Entry 253
- Policy Database 254
- Display Specific 255
- Information 255
- Chapter 19 257
- Enable and Disable RMON 259
- Port Statistics 260
- Histories 262
- Chapter 19: RMON 264
- Voice VLAN 269
- Dynamic Auto 271
- Detection vs 271
- Static Ports 271
- Chapter 20: Voice VLAN 272
- OUI Setting 277
- Modify OUI 278
- Delete OUI 278
- Security 279
- Port Access Control 280
- Port Access 281
- Chapter 21: Security 282
- RADIUS Client 286
- Accounting 288
- Guidelines 289
- Dial-In User 292
- Dial-in User 292
- Modify a Dial-in User 294
- Delete a Dial-in User 294
- Destination MAC Filter 295
- Destination MAC 296
- DHCP Snooping 299
- DHCP with 301
- Option 82 301
- Configuring 304
- General Settings 304
- VLAN Setting 306
- Modifying a 307
- Chapter 22: DHCP Snooping 308
- Binding Database 310
- Chapter 23 313
- Global Configuration 315
- Enabling or 316
- Disabling LLDP 316
- Displaying 317
- Setting Port 317
- Neighbors Information 318
- Network Statistics 319
- Traffic Comparison Statistics 321
- Error Group Statistics 325
- Historical Status Statistics 327
- Section IV 331
- Chapter 25 333
- File Download 340
- File Upload 341
- Cable Diagnostics 345
- Chapter 26: Cable Diagnostics 346
- LED ECO Mode 347
- Enable LED ECO Mode 348
- Disable LED ECO Mode 349
- Chapter 27: LED ECO Mode 350
- Energy-Efficient Ethernet 351
- Enable EEE 352
- Disable EEE 353
- Rebooting the AT-GS950/16 355
- Switch Reboot 356
- Disabling Factory 360
- Default Reset 360
- Enabling Factory 362
- Pinging a Remote System 365
- MSTP Overview 367
- Resolving VLAN 370
- Fragmentation 370
- Multiple VLANs 371
- Assigned to an 371
- Appendix A: MSTP Overview 372
- VLAN and MSTI Associations 374
- Ports in Multiple MSTIs 375
- MST Region 378
- Associating VLANs to MSTIs 381
- Summary of Guidelines 385
- Appendix B 387
- Bridge/Spanning Tree/MSTP 391
- Parameter 391
- Default Setting 391
- Specifications 391
- Bridge/VLAN 394
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