338
C
HAPTER
16: C
ONFIGURING
Q
UALITY
OF
S
ERVICE
(To display a MAP’s CoS mappings and queue usage statistics, see
“Displaying MAP Forwarding Queue Statistics” on page 349.)
Figure 28 shows an example of end-to-end QoS in a 3Com network. In
this example, voice traffic is prioritized based on WMM. This example
assumes that the QoS mappings are set to their default values.
Figure 28
WMM QoS in a 3Com Network
Figure 28 shows the following process:
1
A user sends voice traffic from a WMM VoIP phone. The phone marks the
CoS field of the packet with service type 7, indicating that the packet is
for high priority (voice) traffic.
2
MAP A receives the voice packet and classifies the packet by mapping the
service type in the 802.11 header to an internal CoS value. In this
example, the service type is 7 and maps to internal CoS 7.
Layer 3
WX Switch B
Srvc Type = 7 Voice Data . . .
IP ToS = 0xe0
Voice Data. . .
802.1p = 7
IP ToS = 0xe0
Voice Data. . .
802.1p = 7
Voice
Video
Best Effort
Bgrnd
WX Switch A
4
1
2
3
5
6
Voice Data. . .
Tnl Hdr IP ToS = 0xe0
Voice Data. . .
Tnl Hdr IP ToS = 0xe0
Layer 3
MAP A
MAP B
Summary of Contents for 3CRWX120695A
Page 138: ...138 CHAPTER 6 CONFIGURING AND MANAGING IP INTERFACES AND SERVICES ...
Page 272: ...272 CHAPTER 11 CONFIGURING RF LOAD BALANCING FOR MAPS ...
Page 310: ...310 CHAPTER 13 CONFIGURING USER ENCRYPTION ...
Page 322: ...322 CHAPTER 14 CONFIGURING RF AUTO TUNING ...
Page 350: ...350 CHAPTER 16 CONFIGURING QUALITY OF SERVICE ...
Page 368: ...368 CHAPTER 17 CONFIGURING AND MANAGING SPANNING TREE PROTOCOL ...
Page 412: ...412 CHAPTER 19 CONFIGURING AND MANAGING SECURITY ACLS ...
Page 518: ...518 CHAPTER 21 CONFIGURING AAA FOR NETWORK USERS ...
Page 530: ...530 CHAPTER 22 CONFIGURING COMMUNICATION WITH RADIUS ...
Page 542: ...542 CHAPTER 23 MANAGING 802 1X ON THE WX SWITCH ...
Page 598: ...598 CHAPTER 26 ROGUE DETECTION AND COUNTERMEASURES ...
Page 706: ...706 GLOSSARY ...