3Com VCX v7111 User Manual page 292

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
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 a 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 gateways native VLAN ID.
For information on how to configure VLAN parameters, see
Traffic / Network Types and Priority
Table 83
Application
Debugging interface
Telnet
DHCP
Web server (HTTP)
SNMP GET/SET
Web server (HTTPS)
IPSec IKE
RTP traffic
RTCP traffic
T.38 traffic
SIP
SIP over TLS (SIPS)
292
Traffic / Network Types
Management
Management
Management
Management
Management
Management
Determined by the service
Media
Media
Media
Control
Control
Configuring the VLAN
Class-of-Service (Priority)
Bronze
Bronze
Network
Bronze
Bronze
Bronze
Determined by the service
Premium media
Premium media
Premium media
Premium control
Premium control
®
3Com VCX V7111 VoIP Gateway User Guide
Table 83.
Settings.