Appendix: Vlan Configuration; Automatic Discovery - Tadiran Telecom aeonix TGW4 User Manual

User Manual
Virtual Local Area Network (VLAN) virtually divides a physical LAN into multiple broadcast domains.
Only hosts in the same VLAN can directly communicate without a router, so broadcast packets are
restricted to the same VLAN, improving network security (e.g, a data-only VLAN or voice-only VLAN).
VLAN technology identifies the VLAN information of a data packet by adding the VLAN tag field in the
Ethernet frame header.
As voice traffic is delay and jitter sensitive, it requires higher priority over data traffic to reduce delay and
packet loss during transmission. The switch connected with VoIP device can be configured to transmit the
voice traffic in a dedicated VLAN, called voice VLAN.
When a gateway connect a switch provided VLAN, configurations such as VLAN tags and priorities are
required for the gateway.
The following methods are used for configuring VLANs:

Manual configuration: Via a web-based GUI, restart is required after the configuration.

Automatic discovery (LLDP): With Link Layer Discovery Protocol (LLDP) enabled, during startup
the device automatically obtains VLAN configuration information via an LLDAP message, adds
VLAN tag in packets it sends, and obtains network information such as IP address using the DHCP
mode by default.

Automatic discovery (DHCP): The device obtains the VLAN tag and QoS using DHCP option 132
and option 133.
Tadiran Telecom gateways support two VLAN modes: single VLANs and multi-service VLANs
(including voice and management VLANs). Manual mode is used to configure single and multi-service
VLANs. Automatic discovery mode (by LLDP or DHCP) can configure only single VLANs.
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Automatic Discovery

3.1
All services of the device are on the same VLAN, and the device receives only data packets carrying
the VLAN and includes the VLAN tag in all sent data packets. All device services belong to the same
102
A reboot is required to enable the VLAN configuration.
After a VLAN is configured, only PCs in the same VLAN can access the device.
The device address used to log in to the Web GUI can be obtained by connecting a phone to an FXS port
of the device, and dialing ##. In the case of a single VLAN, the IP address of the single VLAN is voiced;
in the case of a multi-service VLAN, the IP address of the management VLAN is voiced.
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Appendix: VLAN Configuration

T G W S IP -F X S /F S O G a te w a y S e rie s
Tadiran Telecom