What is lldp switch

You can configure the frequency of LLDP updates, the amount of time to hold the information before discarding it, the initialization delay time. Note Steps 2 through 5 can be performed in any order. Optional Specifies the amount of time a receiving device should hold the information sent by your device before discarding it. The range is 0 to seconds; the default is 12 0 s econds. This example shows how to configure a holdtime of second, a delay time of 2 seconds and an update frequency of Note LLDP is disabled by default.

Switch config end. LLDP is disabled globally on all supported interfaces. However, no changes are required at the interface level. You can configure the interface to selectively not to send and receive LLDP packets with the no lldp transmit and no lldp receive commands. Specifies the interface on which you are disabling LLDP, and enter interface configuration mode. Specifies the interface on which you are enabling LLDP, and enter interface configuration mode.

By using the lldp interface configuration command, you can configure the interface not to send the TLVs listed in Table This example shows how to enable a TLV on an interface when it has been disabled. Displays global information, such as frequency of transmissions, the holdtime for packets being sent, and the delay time for LLDP to initialize on an interface. Displays information about neighbors, including device type, interface type and number, holdtime settings, capabilities, and port ID.

You can limit the display to neighbors of a specific interface or expand the display to provide more detailed information. Displays LLDP counters, including the number of packets sent and received, number of packets discarded, and number of unrecognized TLVs. Skip to content Skip to search Skip to footer. X Platform: Catalyst Switches, Most platforms. LLDP Link Layer Discovery Protocol is a neighbor discovery protocol that is used for network devices to advertise information about themselves to other devices on the network.

This protocol runs over the data-link layer. Details, such as device capabilities or device identity can be advertised using this protocol.

This may include the sender's MAC address, IP address, port name, capabilities, port description and system name. Any information not sent is marked 'not advertised'.

LLDP can help identify the device physically connected to the switch port. By carefully examining the LLDP information the switch receives, you can build a network topology map. A sample configuration is shown below:.

The statistic counters include frames received, frames with errors, and unknown TLVs for a given interface.