LANCOM Support Knowledgebase
Document No. 1802.1613.2539.RHOO - V2.40
LANCOM GS-23xx: Voice-VLAN configuration and automatic assignment to IP telephones by means of LLDP-MED
This document describes the configuration required on a LANCOM managed switch of the GS-23xx series in order to configure a voice VLAN and automatically assign it to an IP telephone that supports the LLPD-MED standard.
LLDP-MED (Link Layer Discovery Protocol - Media Endpoint Devices)
is an extension of the LLDP protocol that supports the interoperability of VoIP terminals and other devices on the network, such as a PC.
LANCOM switch of the
with current SwitchOS firmware (
IP telephone supporting LLDP-MED
In this example, the
Voice VLAN has the ID 200
LLDP is to be used as the discovery protocol
The IP telephone should be assigned this VLAN ID automatically as soon as it is connected to the
designated switch port
1) Connect the IP telephone to the switch. For this example we use
switch port 1
for the desired switch ports.
3) As soon as the LLDP-MED-compatible IP telephone has been connected, you should see the appropriate information in the menus
LLDP Neighbors and LLDP-MED Neighbors.
Check the menu
to see whether the terminal supports the application type
Configure LLDP-MED on port 1
with the following values:
Recheck the LLDP-MED Neighbor information
after the LLDP negotiation between the switch and the IP telephone.
6) Switch to the menu
Voice LAN -> Configuration
Enable the Voice LAN
feature and set the
VLAN ID to 200
switch port 1 to Auto
and set the
Discovery Protocol to LLDP
7) Make sure that
port 1 is a member of the VLAN with the ID 200
8) This concludes the configuration. Save the configuration changes to the switch.
9) Enter the VLAN ID (here the 200) in the configuration of your telephone.
To check the functionality
please connect a PC to the switch, e.g. to port 3
and perform the following configuration on the switch:
must be a member
of the VLAN with the ID 200.
VLAN port configuration
needs to be set with the
Save the configuration to the switch. You should now be able to
send a ping
from the PC connected to port 3 to the IP telephone connected to port 1.
Catchwords: sip; telephone; lldp; lldp-med; switch
Please review this document!
This document was helpful
This document was