Enabling Prioritization for Legacy Voice over IP
403
If you are upgrading a switch running MSS Version 3.x to MSS Version
4.x, and the switch uses ACLs to map VoIP traffic to CoS 4 or 5, and you
plan to leave WMM enabled, 3Com recommends that you change the
ACLs to map the traffic to CoS 6 or 7.
You must map the ACL to the outbound traffic direction on a MAP port,
Distributed MAP, or user VLAN. An ACL can set a packet’s CoS only in
these cases.
You can enable legacy VoIP support on a VLAN, port group, port list,
virtual port list, Distributed MAP, or user glob. You do not need to disable
WMM support.
Enabling VoIP
Support for TeleSym
VoIP
To enable VoIP support for TeleSym packets, which use UDP port 3344,
for all users in VLAN
corp_vlan
, perform the following steps:
1
Configure an ACE in ACL
voip
that assigns IP traffic from any IP address
with source UDP port 3344, addressed to any destination address, to CoS
queue 6:
WX4400#
set security acl ip voip permit cos 6 udp any eq 3344
any
2
Configure another ACE to change the default action of the ACL from
deny to permit. Otherwise, the ACL permits only voice traffic that
matches the previous ACE and denies all other traffic.
WX4400#
set security acl ip voip permit any
Table 35
WMM Priority Mappings
Service
Type
IP
Precedence IP ToS
DSCP
802.1p
CoS
MAP
Forwarding
Queue
0
0
0
0
0
0
Background
3
3
0x60
24
3
3
1
1
0x20
8
1
1
Best Effort
2
2
0x40
16
2
2
4
4
0x80
32
4
4
Video
5
5
0xa0
40
5
5
6
6
0xc0
48
6
6
Voice
7
7
0xe0
56
7
7
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 ...