¿Cuáles son las funciones principales de LLDP?

Hola Tadano.

El protocolo de descubrimiento de capa de enlace (LLDP Link Layer Discovery Protocol) se especifica en el documento de estándares IEEE 802.1AB.

LLDP identifica las interfaces en los dispositivos y las interfaces conectadas a otros dispositivos.

Muestra la ruta entre un cliente, un Switch, un Router, un servidor de aplicaciones y un servidor de red.

Puedes ejecutar el comando display lldp neighbor [ interface interface-type interface-number ] para conocer el equipo que se encuentra en el otro extremo de esta interface, como se muestra a continuación:

<Huawei> display lldp neighbor interface ethernet 2/0/0

Ethernet2/0/0 has 1 neighbors:                                    

Neighbor index : 1                                                             

Chassis type   :macAddress                                                     

Chassis ID     :00e0-11fc-1710                                                  

Port ID type  :interfaceName                                                  

Port ID        :Ethernet2/0/0                                   

Port description    :HUAWEI, AR Series, Ethernet2/0/0 Interface    

System name         :Huawei                                                   

System description  :Huawei AR2240 Huawei Versatile Routing Platform Software  V

RP (R) software,Version 5.120 (AR2240 V200R009) Copyright (C) 2011-2013 Huawei

 Technologies Co., Ltd     

System capabilities supported   :bridge                                        

System capabilities enabled     :bridge                                        

Management address type  :ipV4                                                 

Management address       : 10.0.0.1                                           

Expired time   :104s                                                           

Port VLAN ID(PVID)  :1                                                         

VLAN name of VLAN  1: VLAN1                                                    

Protocol identity   :STP RSTP/MSTP LACP GVRP                             

Auto-negotiation supported    :Yes                                             

Auto-negotiation enabled      :Yes                                             

OperMau   :speed(100)/duplex(Full)                                            

Power port class         :PD                                                   

PSE power supported      :No                                                   

PSE power enabled        :No                                                   

PSE pairs control ability:No                                                   

Power pairs              :Unknown                                              

Port power classification:Unknown                                              

Link aggregation supported:Yes                                                 

Link aggregation enabled :No                                                   

Aggregation port ID      :0                                                     

Maximum frame Size       :9216                                                 

MED Device information                                                          

Device class   :Network Connectivity                                           

HardwareRev       :AR01SRU1A VER.A                                               

FirmwareRev       :100                                                          

SoftwareRev       :V200R009                                

SerialNum         :NA                                                          

Manufacturer name :HUAWEI TECH CO., LTD                                                          

Model name        :NA                                                          

Asset tracking identifier :NA                                                  

Media policy type   :Voice                                                   

Unknown Policy      :Defined                                                        

VLAN tagged         :Yes                                                         

Media policy VlanID      :0                                                    

Media policy L2 priority :6                                                    

Media policy Dscp        :46                                                    

Power Type               :Unknown                                              

PoE PSE power source     :Unknown                                              

Port PSE Priority        :Unknown                                              

Port Available power value:2                                  

Saludos.