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Chapter 9 QoS
QoS (Quality of Service) functions to provide different quality of service for various network
applications and requirements and optimize the bandwidth resource distribution so as to provide a
network service experience of a better quality.
QoS
This switch classifies the ingress packets, maps the packets to different priority queues and then
forwards the packets according to specified scheduling algorithms to implement QoS function.
Figure 9-1 QoS function
Traffic classification: Identifies packets conforming to certain characters according to certain
rules.
Map: The user can map the ingress packets to different priority queues based on the priority
modes. This switch implements three priority modes based on port, on 802.1P and on DSCP.
Queue scheduling algorithm: When the network is congested, the problem that many packets
compete for resources must be solved, usually in the way of queue scheduling. The switch
supports four schedule modes: SP, WRR, SP+WRR and Equ.
Priority Mode
This switch implements three priority modes based on port, on 802.1P and on DSCP. By default, the
priority mode based on port is enabled and the other two modes are optional.
1. Port Priority
Port priority is just a property of the port. After port priority is configured, the data stream will be
mapped to the egress queues according to the CoS of the port and the mapping relationship
between CoS and queues.
100
- TL-SG2424P 1
- 4 Combo SFP Slots 1
- COPYRIGHT & TRADEMARKS 2
- FCC STATEMENT 2
- CE Mark Warning 2
- Safety Information 3
- Package Contents 9
- Chapter 1 About this Guide 10
- Chapter 2 Introduction 13
- 2.3 Appearance Description 14
- 2.3.2 Rear Panel 15
- 3.1 Login 16
- 3.2 Configuration 16
- Chapter 4 System 18
- Port Info 19
- 4.1.2 Device Description 20
- 4.1.3 System Time 20
- 4.1.4 Daylight Saving Time 21
- 4.1.5 System IP 23
- 4.2 User Management 24
- User Info 25
- User Table 25
- 4.3 System Tools 26
- 4.3.3 Firmware Upgrade 27
- 4.4 Access Security 28
- 4.4.1 Access Control 29
- 4.4.2 SSL Config 30
- 4.4.3 SSH Config 31
- Global Config 32
- Key Download 32
- Chapter 5 Switching 37
- 5.1.2 Port Mirror 38
- Figure 5-3 Mirroring Port 39
- 5.1.3 Port Security 40
- Port Security 41
- 5.1.4 Port Isolation 42
- 5.1.5 Loopback Detection 43
- 5.2 LAG 44
- 5.2.1 LAG Table 45
- 5.2.2 Static LAG 46
- 5.2.3 LACP Config 47
- LACP Config 48
- 5.3 Traffic Monitor 49
- 5.3.2 Traffic Statistics 50
- Statistics 51
- 5.4 MAC Address 52
- 5.4.1 Address Table 53
- 5.4.2 Static Address 54
- 5.4.3 Dynamic Address 55
- 5.4.4 Filtering Address 57
- 5.5 DHCP Filtering 58
- DHCP Cheating Attack 60
- DHCP Filtering 61
- Trusted Port 61
- Chapter 6 VLAN 62
- 6.1 802.1Q VLAN 63
- PVID 64
- 6.1.1 VLAN Config 65
- VLAN Config 66
- VLAN Members 66
- 6.1.2 Port Config 67
- VLAN of Port 68
- Configure switch A 70
- Configure switch B 70
- Chapter 7 Spanning Tree 71
- STP Timers 72
- STP Generation 73
- In the beginning 73
- Comparing BPDUs 73
- Selecting the root bridge 73
- 7.1 STP Config 76
- Parameters Config 77
- 7.2 Port Config 78
- Port Config 79
- 7.3 MSTP Instance 80
- 7.3.2 Instance Config 81
- 7.3.3 Instance Port Config 82
- 7.4 STP Security 84
- Root Protect 85
- TC Protect 85
- BPDU Protect 85
- BPDU Filter 85
- Port Protect 86
- 7.4.2 TC Protect 87
- Configure switch A: 88
- Configure switch B: 88
- Configure switch C: 89
- Configure switch D: 89
- Chapter 8 Multicast 91
- Multicast Address 92
- Multicast Address Table 92
- 8.1 IGMP Snooping 93
- 8.1.1 Snooping Config 94
- 8.1.2 Port Config 95
- 8.1.3 VLAN Config 96
- VLAN Table 97
- 8.1.4 Multicast VLAN 98
- Configuration procedure: 99
- Network Requirements 100
- Network Diagram 100
- Configuration Procedure 100
- 8.2 Multicast IP 101
- 8.2.2 Static Multicast IP 102
- 8.3 Multicast Filter 103
- 8.3.2 Port Filter 104
- Port Filter Config 105
- 8.4 Packet Statistics 106
- IGMP Statistics 107
- Chapter 9 QoS 108
- 9.1 DiffServ 111
- 9.1.2 DSCP Priority 112
- 9.1.3 802.1P/CoS mapping 113
- 9.1.4 Schedule Mode 114
- 9.2 Bandwidth Control 115
- 9.2.2 Storm Control 116
- 9.3 Voice VLAN 118
- 9.3.1 Global Config 120
- 9.3.2 Port Config 120
- Figure 9-13 Port Config 121
- 9.3.3 OUI Config 122
- Chapter 10 PoE 124
- 10.1.1 PoE Config 125
- 10.1.2 PoE Profile 126
- 10.2 PoE Time-Range 127
- Create Time-Range 128
- Create Time-Slice 128
- 10.2.3 PoE Holiday Config 129
- Chapter 11 SNMP 130
- MIB Introduction 131
- 11.1 SNMP Config 132
- 11.1.2 SNMP View 133
- 11.1.3 SNMP Group 134
- 11.1.4 SNMP User 135
- 11.1.5 SNMP Community 137
- Configuration Procedure: 138
- 11.2 Notification 139
- 11.3 RMON 141
- 11.3.1 History Control 142
- 11.3.2 Event Config 142
- 11.3.3 Alarm Config 143
- Chapter 12 LLDP 146
- 12.1 Basic Config 150
- 12.1.2 Port Config 151
- 12.2 Device Info 152
- 12.3 Device Statistics 153
- Auto Refresh 154
- Global Statistics 154
- Neighbor Statistics 154
- 12.4 LLDP-MED 155
- 12.4.1 Global Config 156
- 12.4.2 Port Config 156
- LLDP-MED Port Config 157
- 12.4.3 Local Info 158
- 12.4.4 Neighbor Info 159
- Neighbor Info 160
- Chapter 13 Maintenance 161
- 13.2 Log 162
- 13.2.1 Log Table 163
- 13.2.2 Local Log 164
- 13.2.3 Remote Log 165
- 13.2.4 Backup Log 165
- 13.3 Device Diagnostics 166
- 13.3.2 Loopback 167
- 13.4 Network Diagnostics 168
- Tracert Config 169
- Appendix A: Specifications 170
- Appendix C: Glossary 173
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