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Quality of Service (QoS): Managing Bandwidth More Effectively
Preparation for Configuring QoS
Preparation for Configuring QoS
QoS operates in VLAN-tagged and VLAN-untagged environments. If your
network does not use multiple VLANs, you can still implement the 802.1Q
VLAN capability for packets to carry their 802.1p priority to the next
downstream device. To do so, configure ports as VLAN-tagged members on
the links between switches and routers in your network infrastructure.
Table 6-6. Summary of QoS Capabilities
Outbound Packet Options Port Membership in VLANs
Tagged Untagged
Control Port Queue Priority for Packet Types Yes Yes
Carry 802.1p Priority Assignment to Next Downstream Device Yes No
Carry DSCP Policy to Downstream Devices. The policy includes: Yes
1
Yes
1
Assigning a ToS Codepoint
Assigning an 802.1p Priority
2
to the Codepoint
1
Except for non-IPv4 packets or packets processed using the QoS IP-Precedence method,
which does not include the DSCP policy option. Also, to use a service policy in this manner,
the downstream devices must be configured to interpret and use the DSCP carried in the IP
packets.
2
This priority corresponds to the 802.1p priority scheme and is used to determine the packet’s
port queue priority. When used in a VLAN-tagged environment, this priority is also assigned
as the 802.1p priority carried outbound in packets having an 802.1Q field in the header.
Steps for Configuring QoS on the Switch
1. Determine the QoS policy you want to implement. This includes analyzing
the types of traffic flowing through your network and identifying one or
more traffic types to prioritize. In order of QoS precedence, these are:
a. UDP/TCP applications
b. Device Priority—destination or source IP address (Note that destina-
tion has precedence over source. See Table 6-5.)
c. IP Type-of-Service Precedence Bits (Leftmost three bits in the ToS
field of IP packets)
d. IP Type-of-Service Differentiated Service bits (Leftmost six bits in the
ToS field of IP packets)
e. VLAN Priority (requires at least one tagged VLAN on the network)
f. Source-Port
g. Incoming 802.1p Priority (requires at least one tagged VLAN on the
network)
6-13
- ProCurve Switches 1
- ProCurve 3
- Switch 2610 Series 3
- Switch 2610-PWR Series 3
- 3 GVRP 6
- 5 Spanning-Tree Operation 8
- Effectively 9
- 7 IP Routing Features 11
- 8 ProCurve Stack Management 12
- Product Documentation 15
- Software Feature Index 16
- Getting Started 21
- Conventions 22
- Command Prompts 23
- Screen Simulations 23
- Sources for More Information 24
- Need Only a Quick Start? 25
- Static Virtual LANs (VLANs) 27
- ProCurve Switch 32
- Overview of Using VLANs 33
- Multiple VLAN Considerations 36
- 2610 Switch 41
- Multiple-Forwarding 41
- Database Switch 41
- Adding or Editing VLAN Names 43
- Default VLAN 44
- Changing the Primary VLAN 52
- 802.1Q VLAN Tagging 56
- The Secure Management VLAN 60
- Preparation 62
- IP Interfaces 65
- VLAN MAC Addresses 65
- VLAN Restrictions 66
- Jumbo Packet Support 66
- General Operation 70
- GVRP Enabled 73
- (Required for Unknown 73
- VLAN operation.) 73
- Unknown VLAN Settings 73
- Default: 73
- Joining 74
- GVRP and VLAN Access Control 76
- Planning for GVRP Operation 77
- Configuring GVRP On a Switch 77
- GVRP Operating Notes 83
- IGMP Features 87
- IGMP Terms 88
- IGMP Operating Features 89
- ProCurve(vlan-1)# ip igmp 92
- ■ Ports A1 - A2: Auto 93
- ■ Ports A3 - A4: Forward 93
- ■ Ports A5 - A6: Block 93
- IGMP Operating Notes 96
- Supported Standards and RFCs 97
- Automatic Fast-Leave IGMP 98
- Forced Fast-Leave IGMP 101
- . The following commands now 102
- Note on VLAN 103
- Numbers 103
- How IGMP Operates 104
- 6 specifies port A6 104
- 49 indicates port C1 105
- Using the Switch as Querier 106
- Multicast Filtering 107
- Spanning-Tree Operation 109
- Contents 110
- Overview 111
- Table 5-4. 802.1s Features 112
- 10, 11, 12 Yes No 113
- 20, 21, 22 No Yes 113
- Region “A”: Logical Topology 114
- Spanning Tree Options 115
- RSTP (802.1w) 116
- STP (802.1D) 116
- How STP and RSTP Operate 117
- Spanning Tree (RSTP) 119
- Configuring RSTP 121
- CLI: Configuring RSTP 122
- Menu: Configuring RSTP 128
- [Device Features] 130
- Menu: Configuring 802.1D STP 131
- *) at the 132
- CLI: Configuring 802.1D STP 134
- STP Fast Mode 138
- Mode = Uplink) only on the 140
- Terminology 141
- Operating Notes 152
- MSTP Structure 155
- How MSTP Operates 157
- Region “X” 158
- Spanning Tree (CST) 159
- Operating Rules 162
- Steps for Configuring MSTP 165
- Parameters 167
- Command Page 180
- Displaying MSTP Statistics 182
- Troubleshooting 189
- Bandwidth More Effectively 191
- Introduction 193
- • IP-device (address) 194
- • VLAN-ID (VID) 194
- • Source-Port 194
- Note On Using 199
- Multiple 199
- Criteria 199
- Planning a QoS Configuration 205
- QoS UDP/TCP Priority 211
- ■ 802.1p priority 212
- Combining 214
- Policy Types 214
- The DSCPs for this 216
- 802.1p priority level 216
- DSCP Policies 217
- Configured in this Step 217
- Classifier 217
- DSCP Policy 217
- QoS IP-Device Priority 218
- No-override) 221
- Configured in this step 223
- Default ToS Configuration 225
- Current ToS Configuration 225
- No-override. Note that 228
- Assignments 229
- ToS Option: 235
- QoS VLAN-ID (VID) Priority 236
- No- override 237
- Priorities 241
- Configured 241
- QoS Source-Port Priority 242
- In this instance, No 243
- No-override. See figure 6 245
- Configured in 247
- Effect of “No-override” 251
- QoS Messages in the CLI 255
- IP Routing Features 259
- Overview of IP Routing 261
- IP Tables and Caches 262
- IP Route Table 263
- IP Forwarding Cache 263
- Switches 266
- Enabling Proxy ARP 270
- Configuring ICMP 272
- Configuring Static IP Routes 274
- Static Route Types 275
- Static IP Route Parameters 275
- Configuring a “Null” Route 277
- Configuring IRDP 280
- Enabling IRDP Globally 281
- Displaying IRDP Information 283
- Configuring DHCP Relay 284
- Enabling DHCP Relay 285
- Configuring a Helper Address 285
- DHCP Option 82 286
- Option 82 Server Support 287
- Option 82 Field Content 290
- Forwarding Policies 292
- Multinetted VLANs 296
- UDP Broadcast Forwarding 300
- Configuration 304
- ProCurve Stack Management 307
- Operation 310
- General Stacking Operation 312
- Operating Rules for Stacking 313
- Specific Rules 314
- Configuring Stack Management 316
- ■ No Manager password 317
- Configure Stacking 319
- [3] to select Stack 320
- [E] (for Edit). Then 320
- [E] (for Edit) 323
- [Tab] to select the 323
- [B] (for Back) to return to 327
- Another Stack 331
- Monitoring Stack Status 332
- Stacking 336
- Big_Waters 340
- Yes. When 342
- SN of 2, you 344
- MAC Address for 345
- Stack Commander 345
- Auto Join disabled 346
- Transmission Interval 351
- [?] in the web 352
- Status Messages 353
- Numerics 355
- 2 – Index 356
- Index – 3 357
- 4 – Index 358
- Index – 5 359
- 6 – Index 360
- Index – 7 361
- 8 – Index 362
- Development Company, L.P 364
- December 2007 364
- Manual Part Number 364
- 5991-8641 364
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