Protocols And Standards; Lldp Configuration Task List - H3C S5120-SI Series Configuration Manual

can configure a re-initialization delay. With this delay configured, a port must wait for the specified
interval before it can initialize LLDP after the LLDP operating mode changes.
Transmitting LLDPDUs
An LLDP-enabled port operating in TxRx mode or Tx mode sends LLDPDUs to its directly connected
devices both periodically and when the local configuration changes. To prevent the network from being
overwhelmed by LLDPDUs during times of frequent local device information change, an interval is
introduced between two successive LLDPDUs.
This interval is shortened to 1 second in either of the following two cases:
A new neighbor is discovered, in other words, a new LLDPDU is received carrying device
information new to the local device.
The LLDP operating mode of the port changes from Disable/Rx to TxRx or Tx.
This is the fast sending mechanism of LLDP. This feature sends a specific number of LLDPDUs at the
1-second interval to help LLDP neighbors discover the local device as soon as possible. Then, the
normal LLDPDU transmit interval resumes.
Receiving LLDPDUs
An LLDP-enabled port operating in TxRx mode or Rx mode checks the validity of TLVs carried in every
received LLDPDU. If valid, the information is saved and an aging timer is set for it based on the time to
live (TTL) value in the Time To Live TLV carried in the LLDPDU. If the TTL value is zero, the information
is aged out immediately.

Protocols and Standards

The protocols and standards related to LLDP include:
IEEE 802.1AB-2005, Station and Media Access Control Connectivity Discovery
ANSI/TIA-1057, Link Layer Discovery Protocol for Media Endpoint Devices

LLDP Configuration Task List

Complete these tasks to configure LLDP:
Performing
Basic LLDP
Configuration
Configuring CDP Compatibility
Configuring LLDP Trapping
Task
Enabling LLDP
Setting the LLDP Operating Mode
Setting the LLDP Re-Initialization Delay
Enabling LLDP Polling
Configuring the Advertisable TLVs
Configuring the Management Address and Its Encoding Format
Setting Other LLDP Parameters
Setting an Encapsulation Format for LLDPDUs
1-6
Remarks
Required
Optional
Optional
Optional
Optional
Optional
Optional
Optional
Optional
Optional