LLDP

This chapter covers some aspects related to the Link Layer Discovery Protocol.

LLDP (Link Layer Discovery Protocol) is a protocol that allows for device characteristics to be advertised in a network. This means that other devices connected to that same network can learn about the broadcasting device (addresses, ports, vlan, etc.) by listening to packets from this protocol.

A device where LLDP is enabled, periodically sends information on the system over its interfaces. Additionally, it allows IP telephones to configure parameters for other devices connected to the network.

Configuration

LLDP can be configured in an interface using interfaces ethernet <txt> lldp.

In OSDx, the LLDP configuration allows various parameters to be set to fine-tune the protocol’s behavior.

An explanation of each configurable parameter is provided below:

  • voice: Configures voice information sending to an IP telephone.

    • vlan: Tells the IP telephone to tag voice traffic in the configured VLAN.

      • cos: Indicates the type of layer 2 priority (Class of Service, CoS).

        • 0: best-effort

        • 1: background

        • 2: excellent-effort

        • 3: critical-applications

        • 4: video

        • 5: voice

        • 6: internetwork-control

        • 7: network-control

    • dscp: Indicates the DSCP (Differentiated Service Code Point) value to be configured.

Monitoring

To monitor the status and configuration of LLDP, you can use the following commands:

Examples

Here you can find examples related to LLDP.

Command Summary

Configuration commands

Operational commands