Configuring Diffserv-To-Vlan Priority Mapping - AudioCodes Mediant 4000 SBC User Manual

CHAPTER 13 Network
'Control Premium QoS'
control-qos
[PremiumServiceClassControlDiffServ]
'Gold QoS'
gold-qos
[GoldServiceClassDiffServ]
'Bronze QoS'
bronze-qos
[BronzeServiceClassDiffServ]

Configuring DiffServ-to-VLAN Priority Mapping

The QoS Mapping table lets you configure up to 64 DiffServ-to-VLAN priority mapping for Layer 3
and Layer-2 Quality of Service (QoS. For each packet sent to the LAN, the VLAN Priority of the
packet is set according to the DiffServ value in the IP header of the packet.Layer-2 802.1Q frames
have a 2-byte field called Tag Control Information. The three most significant bits of this 2-byte field
represents the Class of Service (CoS) value. Layer-2 QoS is represented by this CoS value which
is from 0 to 7 (thus 8 values). Layer-2 QoS parameters define the values for the 3 priority bits in the
VLAN tagaccording to the value of the DiffServ field in the packet IP header (according to the IEEE
802.1p standard). Differentiated Services (DiffServ) is an architecture providing different types or
levels of service for IP traffic. DiffServ (according to RFC 2474), prioritizes certain traffic types
based on priority, accomplishing a higher-level QoS at the expense of other traffic types. By
prioritizing packets, DiffServ routers can minimize transmission delays for time-sensitive packets
such as VoIP packets.
The following procedure describes how to configure DiffServ-to-VLAN priority mapping through the
Web interface. You can also configure it through ini file [DiffServToVlanPriority] or CLI
(configure network > qos vlan-mapping).
➢
To configure DiffServ-to-VLAN priority mapping:
1. Open the QoS Mapping table (Setup menu > IP Network tab > Quality folder > QoS
Mapping).
2. Click New; the following dialog box appears:
Parameter Description
Note: You can also configure the the parameter per
IP Profile (IpProfile_IPDiffServ) or Tel Profile
(TelProfile_IPDiffServ).
Defines the DiffServ value for Premium Control
CoS content (Call Control applications).
The valid range is 0 to 63. The default is 24.
Note: You can also configure the the parameter per
IP Profile (IpProfile_SigIPDiffServ) or Tel Profile
(TelProfile_SigIPDiffServ).
Defines the DiffServ value for Gold CoS content
(streaming applications).
The valid range is 0 to 63. The default is 26.
Defines the DiffServ value for Bronze CoS content
(OAMP applications).
The valid range is 0 to 63. The default is 10.
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Mediant 4000 SBC | User's Manual