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Class of Service Configuration
3-131
3
Mapping DSCP Priority
The DSCP is six bits wide, allowing coding for up to 64 different forwarding
behaviors. The DSCP replaces the ToS bits, but it retains backward compatibility
with the three precedence bits so that non-DSCP compliant, ToS-enabled devices,
will not conflict with the DSCP mapping. Based on network policies, different kinds of
traffic can be marked for different kinds of forwarding. The DSCP default values are
defined in the following table. Note that all the DSCP values that are not specified
are mapped to CoS value 0.
Command Attributes
• DSCP Priority Table – Shows the DSCP Priority to CoS map.
• Class of Service Value – Maps a CoS value to the selected DSCP Priority value.
Note that “0” represents low priority and “7” represent high priority.
Note:
IP DSCP settings apply to all interfaces.
Web – Click Priority, IP DSCP Priority. Select an entry from the DSCP table, enter a
value in the Class of Service Value field, then click Apply.
Figure 3-78 IP DSCP Priority
Table 3-13 Mapping DSCP Priority Values
IP DSCP Value CoS Value
00
81
10, 12, 14, 16 2
18, 20, 22, 24 3
26, 28, 30, 32, 34, 36 4
38, 40, 42 5
48 6
46, 56 7
- LevelOne 1
- Contents 14
- Chapter 1: Introduction 19
- Introduction 20
- System Defaults 23
- Connecting to the Switch 27
- Required Connections 28
- Stack Operations 29
- Basic Configuration 30
- Setting Passwords 31
- Setting an IP Address 31
- Initial Configuration 32
- Dynamic Configuration 32
- Community Strings 33
- Saving Configuration Settings 34
- Managing System Files 35
- Using the Web Interface 37
- Home Page 38
- Panel Display 39
- Main Menu 40
- Manual Configuration 49
- Using DHCP/BOOTP 50
- Managing Firmware 51
- Console Port Settings 56
- Telnet Settings 58
- Configuring Event Logging 60
- Remote Log Configuration 62
- Displaying Log Messages 63
- Resetting the System 66
- Setting the System Clock 67
- Setting the Time Zone 68
- User Authentication 71
- Configuring HTTPS 76
- Configuring the Secure Shell 78
- Generating the Host Key Pair 80
- Configuring the SSH Server 82
- Configuring Port Security 83
- Displaying 802.1X Statistics 90
- Access Control Lists 93
- Setting the ACL Name and Type 94
- Configuring a Standard IP ACL 95
- Configuring a MAC ACL 98
- Port Configuration 100
- Configuring the Switch 102
- Creating Trunk Groups 104
- Configuring LACP Parameters 109
- Displaying LACP Port Counters 111
- Configuring Port Mirroring 118
- Configuring Rate Limits 119
- Rate Limit Configuration 120
- Rate Limit Granularity 120
- Showing Port Statistics 121
- Address Table Settings 126
- Displaying the Address Table 127
- Changing the Aging Time 129
- Displaying Global Settings 130
- Configuring Global Settings 133
- Displaying Interface Settings 136
- VLAN Configuration 141
- Displaying Current VLANs 145
- Creating VLANs 147
- Private VLANs 153
- Configuring Private VLANs 155
- Associating VLANs 155
- Layer 2 Queue Settings 159
- Priority 161
- 13. CLI shows Queue ID 161
- Selecting the Queue Mode 163
- Layer 3/4 Priority Settings 164
- Mapping IP Precedence 165
- Mapping DSCP Priority 167
- Mapping IP Port Priority 168
- Mapping CoS Values to ACLs 169
- Multicast 171
- Multicast Filtering 173
- Accessing the CLI 179
- Console Connection 179
- Telnet Connection 179
- Command Line Interface 180
- Entering Commands 181
- Showing Commands 182
- Partial Keyword Lookup 183
- Using Command History 183
- Understanding Command Modes 183
- Exec Commands 184
- Configuration Commands 184
- Command Line Processing 186
- Command Groups 187
- Line Commands 188
- General Commands 197
- System Management Commands 202
- User Access Commands 203
- IP Filter Commands 206
- Web Server Commands 208
- Telnet Server Commands 211
- Secure Shell Commands 212
- Event Logging Commands 221
- SMTP Alert Commands 227
- Time Commands 231
- System Status Commands 235
- Frame Size Commands 242
- Flash/File Commands 243
- Authentication Commands 249
- RADIUS Client 251
- TACACS+ Client 254
- Port Security Commands 257
- 802.1X Port Authentication 259
- Access Control List Commands 267
- IP ACLs 268
- MAC ACLs 275
- ACL Information 280
- SNMP Commands 281
- Interface Commands 286
- Mirror Port Commands 297
- Rate Limit Commands 299
- Link Aggregation Commands 301
- Address Table Commands 311
- Spanning Tree Commands 315
- VLAN Commands 327
- Configuring VLAN Interfaces 329
- Displaying VLAN Information 334
- Priority Commands 346
- Multicast Filtering Commands 359
- IP Interface Commands 368
- Software Features 373
- Management Features 374
- Standards 374
- Management Information Bases 375
- Software Specifications 376
- Appendix B: Troubleshooting 377
- Using System Logs 378
- Glossary 379
- GSW-2692 390
- E072006-R01 390
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