H3C Technologies H3C S7500E Series Switches - Manual (Page 317)

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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:
Task Remarks
Enabling LLDP Required
Setting the LLDP Operating Mode Optional
Setting the LLDP Re-Initialization Delay Optional
Enabling LLDP Polling Optional
Configuring the Advertisable TLVs Optional
Configuring the Management Address and Its Encoding Format Optional
Setting Other LLDP Parameters Optional
Performing Basic
LLDP
Configuration
Setting an Encapsulation Format for LLDPDUs Optional
Configuring CDP Compatibility Optional
Configuring LLDP Trapping Optional
LLDP-related configurations made in Ethernet port view take effect only on the current port, and those
made in port group view take effect on all ports in the current port group.