LLDP MED
LLDP Media Endpoint Discovery (LLDP-MED) is an extension of LLDP that provides the following additional capabilities to support media endpoint devices.
- Enables the advertisement and discovery of network polices for real-time applications such as voice and/or video.
- Device location discovery to allow creation of location databases and, in the case of Voice over Internet Protocol (VoIP), Emergency Call Service (E-911) by using IP Phone location information.
- Troubleshooting information. LLDP MED sends alerts to network managers upon:
Setting LLDP MED Network Policy
An LLDP-MED network policy is a related set of configuration settings for a specific real-time application such as voice, or video. A network policy, if configured, will be included into the outgoing LLDP packets to the attached LLDP media endpoint device. The media endpoint device should send its traffic as specified in the network policy it receives. For example, a policy can be created for VoIP traffic that instructs VoIP phone to:
Network policies are associated with ports by using the LLDP MED Port Settings page. An administrator can manually configure one or more network policies and the interfaces where the policies are to be sent. It is the administrator's responsibility to manually create the VLANs and their port memberships according to the network policies and their associated interfaces.
In addition, an administrator can instruct the switch to automatically generate and advertise a network policy for voice application based on the voice VLAN maintained by the switch. Refer the Auto Voice VLAN section for details on how the switch maintains its voice VLAN.
To define an LLDP MED network policy:
- Click Administration > Discovery - LLDP > LLDP MED Network Policy. The LLDP MED Network Policy page opens.
This page displays previously-created network policies.
- Select Auto for LLDP-MED Network Policy for Voice Application if the switch is to automatically generate and advertise a network policy for voice application based on the voice VLAN maintained by the switch.
- Click Apply to add this to the Running Configuration file.
- To define a new policy, click Add and the Add LLDP MED Network Policy page opens.
- Enter the values.
- Network Policy Number--Select the number of the policy to be created.
- Application--Select the type of application (type of traffic) for which the network policy is being defined:
- VLAN ID--Enter the VLAN ID to which the traffic should be sent.
- VLAN Tag--Select whether the traffic is Tagged or Untagged.
- User Priority--Select the traffic priority applied to traffic defined by this network policy.
- DSCP Value--Select the DSCP value to associate with application data sent by neighbors. This informs them how they should mark the application traffic they send to the switch.
- Click Apply. The network policy is defined.
NOTE You must manually configure the interfaces to include the desired manually defined network policies for the outgoing LLDP packets using the LLDP MED Port Settings.