| Device Network |
20
Parameters
DHCP Option
Description
Information Refresh Time
32
Specify an upper bound for how long
a client should wait before refreshing
information retrieved from DHCPv6.
VLAN
The purpose of VLAN configurations on the device is to insert a tag with VLAN information to the packets
generated by the device. When VLAN is properly configured for the ports (Internet port and PC port) on the
device, the device will tag all packets from these ports with the VLAN ID. The switch receives and forwards
the tagged packets to the corresponding VLAN according to the VLAN ID in the tag, as described in IEEE
Std 802.3.
VLAN on devices allows simultaneous access to a regular PC. This feature allows a PC to be daisy
chained to a device and the connection for both PC and phone to be trunked through the same physical
Ethernet cable.
In addition to manual configuration, the device also supports the automatic discovery of VLAN via LLDP,
CDP, or DHCP. The assignment takes effect in this order: assignment via LLDP/CDP, manual configuration,
then assignment via DHCP.
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LLDP Configuration
LLDP (Linker Layer Discovery Protocol) is a vendor-neutral Link Layer protocol, which allows devices to
receive and/or transmit device-related information from/to directly connected devices on the network that
are also using the protocol, and store the information about other devices.
When the LLDP feature is enabled on the devices, the devices periodically advertise their information
to the directly connected LLDP-enabled switch. The devices can also receive LLDP packets from the
connected switch. When the application type is “voice”, the devices decide whether to update the VLAN
configurations obtained from the LLDP packets. When the VLAN configurations on the devices are different
from the ones sent by the switch, the devices perform an update and reboot. This allows the devices to
plug into any switch, obtain their VLAN IDs, and then start communications with the call control.
The following table lists the parameters you can use to configure LLDP.
Parameter
static.network.lldp.enable
[1]
<y0000000000xx>.cfg
Description
It enables or disables the LLDP feature on the device.
Permitted Values
0
-Disabled
1
-Enabled, the device will attempt to determine its VLAN ID through LLDP.
Default
1
Web UI
Network
>
Advanced
>
LLDP
>
Active
Phone UI
>
Settings
>
Device Settings
>
Network (default password: admin)
>
LLDP
>
LLDP Status
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