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630
C
HAPTER
15: P
RIORITIZING
N
ETWORK
T
RAFFIC
Service levels enable easy identification of end-to-end treatment of
traffic. If the example was to be configured appropriately on the devices
throughout the network, it would be possible to say that database traffic
is treated as business critical throughout the network.
Settings within a service level may vary from device to device depending
upon the device’s capabilities. One device, for example, may have four
queues whilst another device may have two. As a result, a particular
service level on one device may put the traffic in queue 3 while on
another device it may be queue 1. However, identifying the service levels
by name simplifies the understanding of the configuration.
Configuring the
Network for
End-to-end Traffic
Prioritization
When some devices in a network are complex classification devices and
other devices are simple classification devices, it is necessary to apply
configurations in such a way that the markings applied by the complex
classification devices are treated appropriately by the simple classification
devices.
In the previous example it was possible to specify that each service level
marked its traffic with a DiffServ codepoint, assuming that the device in
question was a complex classification device. The DiffServ codepoints can
be seen in
Table 99
.
Table 99
DiffServ Codepoints
The DiffServ codepoints chosen in the table above are taken from the
recommended values from RFC2474 and RFC3246.
The Blocked Service Level does not require a DiffServ codepoint value as
the traffic is dropped anyway which makes marking the traffic
unnecessary.
In order for devices to be able to provide suitable prioritization when they
are not capable of identifying the types of traffic, it is possible to
configure the devices to identify the traffic by their DiffServ codepoint.
Service Level
DiffServ Codepoint
Business Critical Service Level
16
CEO’s Service Level
24
Voice Service Level
46
All Other Traffic Service Level
0
Summary of Contents for 3C15500 - Network Director - PC
Page 4: ......
Page 34: ......
Page 38: ...34 ABOUT THIS GUIDE ...
Page 50: ...46 CHAPTER 1 GETTING STARTED ...
Page 64: ...60 CHAPTER 2 PRODUCT ACTIVATION ...
Page 213: ...Components 209 Figure 75 Export to Visio Dialog Box ...
Page 220: ...216 CHAPTER 5 WORKING WITH THE MAP Figure 84 Double Clicking on a Router in the Tree ...
Page 264: ...260 CHAPTER 6 VIEWING DEVICE DETAILS Figure 117 Security Tab for a Device ...
Page 276: ...272 CHAPTER 6 VIEWING DEVICE DETAILS ...
Page 322: ...318 CHAPTER 7 MONITORING THE NETWORK ...
Page 385: ...Examples 381 Figure 189 Attach Alerts Dialog Box ...
Page 406: ...402 CHAPTER 9 PERFORMANCE REPORTING ...
Page 431: ...Components 427 History View dialog box Figure 210 History View Dialog Box ...
Page 440: ...436 CHAPTER 10 RMON Host View dialog box Figure 219 Host View Dialog Box ...
Page 476: ...472 CHAPTER 11 CREATING REPORTS ...
Page 502: ...498 CHAPTER 12 CONFIGURING SINGLE DEVICES ...
Page 526: ...522 CHAPTER 13 VLAN MANAGEMENT Figure 272 Options Dialog Box VLANs Tab ...
Page 567: ...Components 563 Figure 305 Selecting the Link to the End Station on the Map ...
Page 626: ...622 CHAPTER 14 BULK CONFIGURATION ...
Page 684: ...680 CHAPTER 16 UPGRADING DEVICE SOFTWARE ...
Page 814: ...810 CHAPTER 19 BACKING UP DEVICE CONFIGURATIONS ...
Page 838: ...834 CHAPTER 20 LIVE UPDATE ...
Page 894: ...890 APPENDIX G ADDING MAC ADDRESS VENDOR TRANSLATIONS ...