Enabling voip support for telesym voip – 3Com WX4400 3CRWX440095A User Manual
Page 403
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