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Superblade Network Modules User’s Manual
6-16
6-7 Quality of Service
Quality of Service (QoS) helps a network user to reserve a guaranteed bandwidth for
some critical application functions that require a high bandwidth and high priority.
Applications such as video, audio streaming, VoIP and video conferencing must have a
certain amount of bandwidth to maintain their operation correctly. QoS allows user to
prioritize network traffic, thereby providing better services for those applications with a
higher priority.
The switch supports 802.1p priority queuing QoS based on the priority bit in a frame’s
VLAN header. The 802.1p priority bit, if present in the frame, specifies the priority of the
frame during forwarding. The 802.1p standard uses eight (0-7) priority levels for network
traffic. Priority level 7 is the highest priority. Priority level 0 is the lowest level.
Priority Queues
Four priority queues are provided for each port. The priority queues are labeled from 3
to 0. Priority queue 3 has highest priority while queue 0 has lowest priority. The switch
transmits the frames based on the priority of the queue, not the priority tag. Frames in a
higher priority queue are served more often than frames in a lower priority queue.
User configurable mapping (priority queue assignment) between the eight 802.1p
priority classes and the four priority queues is provided. If the incoming frame is
untagged, the switch uses the priority field in the per-port default priority (configurable in
the P
ORT folder) to assign a frame to a priority queue. If the incoming frame is tagged or
priority-tagged, the switch uses the priority field in the incoming frame to assign the
frame to a priority queue.
The scheduling for transmission among the four priority queues is accomplished by one
of the two user-configurable schemes: strict (fixed) priority and weighted round-robin.
For strict priority based scheduling, the packets which were put in the higher priority
queue are transmitted first. If there are multiple frames with different priority tags in the
same priority queue, the frame with higher priority level is transmitted first. After all
frames in the higher priority queue have been transmitted, the frames in the lower
priority queue will start transmitting.
For the weighted round-robin based scheduling, the number of packets served in the
priority queue is determined by the weight number. After those packets are transmitted,
the service moves to transmit the packets in the next queue. Therefore, a higher priority
queue should have a higher weight number than a lower priority queue. The weight
number is from 1 to 15 for the switch. If each queue has same weight number, then each
queue has an equal opportunity to transmit frames just like in round-robin queuing.
To configure the QoS, click the Q
OS folder on the left-hand side bar. It should display as
shown in Figure 6-13.
The Q
OS SETTING sets the priority relationship between the four queues, selects the
scheduling method for those queues, associates packets of specific priorities to specific
queues, and specifies a “weight” for each queue.
- SuperBlade 1
- Network Modules 1
- User’s Manual 1
- REPRODUCTIVE HARM 2
- Table of Contents 3
- List of Figures 13
- List of Tables 21
- About this Manual 27
- Manual Organization 27
- Chapter 1 29
- Introduction 29
- 1-4 Contacting Supermicro 30
- Chapter 2 31
- System Safety 31
- 2-4 Operating Precautions 32
- Chapter 3 33
- Setup and Installation 33
- SBM-GEM-001 34
- Switch Modules 34
- Removing a Switch Module 35
- Network Connection 37
- SERNAME box 38
- Address Defaults 39
- Command Line 40
- Firmware 41
- Chapter 4 47
- InfiniBand Modules 47
- Chapter 4: InfiniBand Modules 49
- InfiniBand Switch LEDs 54
- Chapter 5 55
- Ethernet Modules 55
- LED Indicators 56
- Chapter 5: Ethernet Modules 57
- Pass-through Module 60
- Chapter 6 65
- 1-Gb Ethernet Switch Firmware 65
- WITCH STATUS screen in the 66
- 6-1 Port Status 68
- Port VLAN ID (PVID) 69
- Jumbo Frames Support 69
- Control Description 70
- 6-2 Statistics 71
- 6-3 VLAN 74
- 6-4 Configuring a Static VLAN 76
- 6-5 Trunking 77
- 6-6 Mirroring 79
- 6-7 Quality of Service 80
- 6-8 Rate Control 82
- 6-9 L2 Management 83
- ELETE link for that 84
- DDRESSES 84
- 6-10 Spanning Tree 85
- Port Transition State 86
- NABLE RSTP dialog 87
- PPLY GLOBAL SETTINGS button 87
- Root Status 88
- Bridge Setting 88
- RSTP Port Settings 89
- 6-11 IEEE 802.1x 90
- 802.1x Configuration 91
- 6-12 IGMP Snooping 92
- 6-13 SNMP 94
- Chapter 7 99
- 7-2 Login 100
- 7-3 Home Page 101
- Top Page Links 104
- Top LED Display 104
- Left Side Tree 104
- 7-4 System Management Page 105
- System Settings 107
- System Version 109
- File Management 110
- File Copy 111
- Firmware Upgrade 112
- Management Security 113
- Management User Account 114
- TACACS+ Global Settings 116
- TACACS+ Server Configuration 117
- IP Authorized Manager 118
- SSH Configuration 119
- SSLConfiguration 120
- ONFIGURATION page 121
- Syslog Configuration 122
- Syslog Mail Configuration 123
- MAC Based ACL 124
- IP Standard ACL 125
- IP Extended ACL 126
- Parameter Description 127
- WEBGUI Settings 128
- GENT CONTROL SETTINGS page 129
- SNMP Community Settings 130
- SNMP Group Settings 131
- SNMP Group Access Settings 132
- SNMP View Tree Settings 133
- SNMP Target Address Settings 134
- SNMP User Settings 136
- SNMP Trap Settings 137
- SNMP AgentX 138
- RMON Basic Settings 140
- Event Configuration 141
- RMON Alarm Configuration 142
- ALLING THRESHOLD 143
- QOS Basic Settings 145
- QOS Classmap Settings 146
- QOS Policymap Settings 147
- COSQ Scheduling Algorithm 148
- EIGHT value 149
- NTP Settings 150
- CX4 Cable Length 152
- Enabling Stacking 153
- Figure 7-47. Switch Diagram 154
- Stack Configuration 156
- Stack Details 157
- Stack Link Status 158
- Stack Counters 159
- 7-5 Layer 2 Management 161
- Layer 2 Basic Settings 162
- Port Manager 163
- Port Monitoring 165
- VLAN Traffic Class 166
- Port Control 167
- Rate Limiting 168
- VLAN Basic Settings 169
- Port Settings 170
- Static VLAN 171
- Protocol Group 172
- Port Protocol 172
- Vlan Port MAC Map 173
- Unicast MAC 174
- Wildcard 175
- Switch Port VLAN 176
- Dynamic Vlan 177
- Port Configuration 178
- GARP Timers 179
- RSTP Global Settings 180
- RSTP Basic Settings 181
- Port Status 183
- MSTP Basic Settings 184
- MSTP Timers 186
- VLAN Mapping 188
- CIST Port Status 190
- LA Basic Settings 192
- Interface Settings 193
- Port Channel 194
- Port State Info 196
- Load Balancing 197
- Basic Settings 198
- Local AS 202
- MAC Session Info 203
- Unicast Filters 204
- Multicast Filters 205
- 7-6 Layer 3 Management 206
- Vlan Interface 207
- IP V4 Interface Settings 208
- IP Route 209
- LoopBack Basic Settings 210
- IPv6 Route Configuration 211
- IPv6 Interface 212
- ND Cache 213
- Address Settings 214
- Address Profile 215
- Prefix Settings 216
- DHCP Server 217
- Pool Settings 218
- DHCP Relay 219
- RIP Basic Settings 221
- Interfaces 222
- Neighbors List 223
- Security Settings 224
- Address Summarization 225
- RIP6 Interface 226
- OSPF Basic Settings 229
- Interface 231
- Virtual Interface 232
- OSPF Neighbor 233
- OSPF RRD Route Configuration 234
- OSPF Area Aggregation 235
- External Aggregation 236
- OSPFv3 Basic Settings 238
- OSPF V3 External Aggregation 242
- BGP Basic Settings 244
- BGP Peer Configuration 245
- BGP MED Configuration 246
- Local Preference 247
- BGP Filter 249
- Route Aggregations 250
- Advanced BGP Configuration 251
- BGP Community Management 252
- RRD Basic Settings 254
- RRD6 Basic Settings 258
- RRD V6 OSPF 260
- VRRP Basic Settings 262
- VRRP Settings 263
- 7-7 Multicast 264
- IGMP Snooping Configuration 265
- IGMP Snooping Timer 266
- IGMP Snooping Interface 267
- IGMP Snooping VLAN Router 268
- IGMP MAC Forwarding 269
- Dynamic Multicast 270
- Interface Configuration 273
- Group Information 274
- Source Information 275
- Component 277
- Candidate RPs 279
- Threshold 280
- Static RP 281
- DVMRP Basic Settings 282
- 7-8 Statistics 284
- Ethernet Statistics 286
- ADIUS SERVER ADDRESS 288
- ORT NUMBER 288
- OUND TRIP TIME in seconds 288
- TACACS+ Statistics 290
- RMON Ethernet Statistics 292
- SNMP Statistics 294
- Current DB 297
- VLAN Port Statistics 298
- VLAN Multicast Table 299
- VLAN Counter Statistics 300
- VLAN Capabilities 301
- VLAN FDB Entries 302
- RSTP Statistics 303
- RSTP Port Statistics 304
- MSTP Statistics 306
- MSTP CIST Statistics 307
- MSTP MSTI Port Statistics 308
- Link Aggregation (LA) 309
- LA Port Statistics 310
- LA Neighbor Statistics 311
- 802.1X Session Statistics 312
- 802.1X Supplicant Statistics 313
- Mac Session Statistics 314
- ARP Cache 316
- ICMP Statistics 317
- IP V6 Interface Statistics 319
- ICMP V6 Statistics 321
- RIP Statistics 323
- RIP6 Interface Statistics 324
- RIP6 Route Information 325
- OSPF Route Information 327
- OSPF Link State DB 328
- OSPFV3 Route Information 330
- OSPFV3 Link State DB 331
- VRRP Statistics 332
- IGMP Snooping 334
- IGMP Snooping V3 Statistics 336
- IGMP Statistics 337
- PIM Interface Statistics 339
- PIM Neighbor Statistics 340
- PIM BSR Info 341
- PIM RP Set Information 342
- PIM Route Information 343
- DVMRP Routers 344
- DVMRP Multicast Routers 345
- DVMRP Prune Statistics 346
- Appendix A 369
- HCA Mezzanine Cards 369
- A-2 Mezzanine HCA Cards 370
- InfiniHost III Lx DDR chip 371
- A-3 Installation 377
- Card Installation 378
- Figure A-9. Card Installation 379
- Appendix B 381
- LED Descriptions 381
- Appendix B: LED Descriptions 383
- Descriptions 384
- Appendix C 385
- Installing Triple Wide Bays 385
- Screws 4Pcs 386
- Screws 4pcs 387
- Disclaimer 391
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