V7122 Gateway User Guide
281
The class-of-service mechanism can be utilized to accomplish Ethernet QoS. Packets sent
by the gateway to the Ethernet network are divided into five, different-priority classes
(Network, Premium media, Premium control, Gold and Bronze). The priority of each class is
determined by a corresponding
ini
file parameter.
Traffic type tagging can be used to implement Layer 2 VLAN security. By discriminating
traffic into separate and independent domains, the information is preserved within the VLAN.
Incoming packets received from an incorrect VLAN are discarded.
For the mapping of an application to its class-of-service and traffic type, see
Table 53.
Media traffic type is assigned ‘Premium media’ class of service, Management traffic type is
assigned ‘Bronze’ class of service, and Control traffic type is assigned ‘Premium control’
class of service. For example, RTP/RTCP traffic is assigned the Media VLAN ID and
‘Premium media’ class of service, whereas Web traffic is assigned the Management VLAN
ID and ‘Bronze’ class of service. Each of these parameters can be configured with an
802.1p/q value: traffic type to VLAN ID, and class of service to 802.1p priority.
•
As a safety measure, the VLAN mechanism is activated only when the
gateway is loaded from the flash memory. Therefore, when using BootP:
Load an ini file with ‘VlanMode = 1’ and ‘SaveConfiguration = 1’. Then (after
the gateway is active) reset the gateway with TFTP disabled, or by using any
method except for BootP.
•
The gateway must be connected to a VLAN-aware switch, and the switch’s
PVID must be equal to the gateway’s native VLAN ID.
For information on how to configure VLAN parameters, see
Table 35
.
Table 53
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
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