Media5 Mediatrix 4104, Reference Manual, Page: 359 / 466

Voice QoS vs RTCP Packets Reference Manual (SIP Version)
Mediatrix 4104 337
Voice QoS vs RTCP Packets
You can define whether or not the configuration related to the voice QoS ( qosVoiceDiffServ and
qosVoiceIeee8021qUserPriority variables) is also applied to the RTCP packets generated by the device.

To define the voice QoS configuration behavior :
1. In the qosInterop group of the qosMIB , locate the qosInteropUseVoiceQoSForRtcpEnable variable.
2. Set the value of this variable according to your needs.
VLAN
You can set various VLAN parameters to control user priority.
You can also set these parameters via the web interface, as described in “802.1q Configuration” on page 115 .
Table 221: Voice QoS Behavior
Status Description
enable The voice QoS configuration ( qosVoiceDiffServ and qosVoiceIeee8021qUserPriority
variables) is also applied to the RTCP packets.
disable The RTCP packets are not tagged by the qosVoiceDiffServ and
qosVoiceIeee8021qUserPriority variables.
VLANs
VLANs are created with standard Layer 2 Ethernet. A VLAN Identifier (VID) is associated with each
VLAN. VLANs offer the following benefits:
• VLANs are supported over all IEEE 802 LAN MAC protocols, and over shared media LANs as
well as point-to-point LANs.
• VLANs facilitate easy administration of logical groups of stations that can communicate as if
they were on the same LAN. They also facilitate easier administration of moves, adds, and
changes in members of these groups.
• Traffic between VLANs is restricted. Bridges forward unicast, multicast, and broadcast traffic
only on LAN segments that serve the VLAN to which the traffic belongs.
The VLAN field in the Ethernet file is located after both destination and source addresses:
0 1
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 (byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
| Dest Addr | Src Addr | VLAN | Type/Length | ...
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
The VLAN field is separated as follows:
0 (bit) 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| 0x8100 | Pri |T| VID |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
For both signalling and media packets, the VLAN priority section is configurable independently.