User Manual HX4E/MX8A Series Voice Gateway
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3.2 Automatic Configuration
3.2.1 Handling Process for Automatically Enabling VLAN
Figure 3-74 System Composition
The process consists of the following steps:
The device periodically sends an LLDP message to notify the switch the device information. The
sending interval is modifiable on the GUI interface. See Table 2-4.
At the same time, the device receives an LLDP message from the switch, and parses VLAN ID, Priority,
and DSCP fields.
If the message carries a VLAN ID, the device enables the VLAN, adds VLAN information to
the next messages to be sent, and obtains network information such as an IP address via
DHCP.
If the VLAN is also manually enabled on the GUI interface, its VLAN information will be
replaced by the information that the device has obtained from the LLDP message.
If the message does not carry a VLAN ID, the device checks whether the VLAN is manually
enabled. If the VLAN is manually enabled, the device uses the VLAN information
configured manually; otherwise, the device enters the non-VLAN communication status.
Handling Procedure When the LLDP Message Carries a VLAN ID
The device detects whether the LLDP message carries a VLAN ID upon startup only. Once a VLAN ID
is detected, the device enables the VLAN, adds VLAN information to the next messages to be sent, and
obtains network information such as an IP address via DHCP. The device ignores any subsequent LLDP
message with different VLAN ID. Figure 3-75 shows the handling procedure.
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