AudioCodes Mediant 600 - Page 111

Version 6.4 111 March 2012
SIP User's Manual 10. Network
10.3.1.1.3.4 Quality of Service Parameters
The device allows you to specify values for Layer-2 and Layer-3 priorities, by assigning
values to the following service classes:

Network Service class – network control traffic (ICMP, ARP)

Premium Media service class – used for RTP Media traffic

Premium Control Service class – used for Call Control traffic

Gold Service class – used for streaming applications

Bronze Service class – used for OAMP applications
The Layer-2 QoS parameters define the values for the 3 priority bits in the VLAN tag of
frames related to a specific service class (according to the IEEE 802.1p standard). The
Layer-3 QoS parameters define the values of the DiffServ field in the IP Header of the
frames related to a specific service class.
For Layer-3 CoS, you can use the PremiumServiceClassMediaDiffServ,
PremiumServiceClassControlDiffServ, GoldServiceClassDiffServ, and
BronzeServiceClassDiffServ parameters.
The mapping of an application to its CoS and traffic type is shown in the table below:
Table 10-5: Traffic/Network Types and Priority
Application Traffic / Network Types Class-of-Service (Priority)
Debugging interface
Management Bronze
Telnet
Management Bronze
DHCP
Management Network
Web server (HTTP)
Management Bronze
SNMP GET/SET
Management Bronze
Web server (HTTPS)
Management Bronze
IPSec IKE
Determined by the service Determined by the service
RTP traffic
Media Premium media
RTCP traffic
Media Premium media
T.38 traffic
Media Premium media
SIP
Control Premium control
SIP over TLS (SIPS)
Control Premium control
Syslog
Management Bronze
ICMP
Management Determined by the initiator of the
request
ARP listener
Determined by the initiator of the
request
Network
SNMP Traps
Management Bronze
DNS client
Varies according to DNS settings:
 OAMP
 Control
Depends on traffic type:
 Control: Premium Control
 Management: Bronze
NTP
Varies according to NTP settings Depends on traffic type: