Saturday, February 16, 2019

networking: LLDP-MED

LLDP-MED – LLDP-Media Endpoint Devices:

This protocol enables advanced LLDP features in a Voice over IP (VoIP) network. Whereas LLDP enables network discovery between Network Connectivity devices, LLDP-MED enables network discovery between Network Connectivity devices and media Endpoints (ie. VoIP phones).


Example Configuration String (this is entered on the Network Connectivity devices / switch):

lldp med network-policy application voice tagged vlan 30 priority 5 dscp 46 ports ethe 1/1/1 to 1/1/48

With this string configured, it specifies VLAN 30 as the voice vlan, assigns the 802.1p/Q Priority Code Point of 5 to that VLAN, and assigns the DSCP value of 46 also to that VLAN (each of which are the highest categories).

Example: