Administrator Guide

• LLDPDUs are transmitted and received by default. LLDPDUs are transmitted periodically. The default interval is 30 seconds.
• LLDPDU information received from a neighbor expires after the default Time to Live (TTL) value: 120 seconds.
• Dell Networking OS supports up to eight neighbors per interface.
• Dell Networking OS supports a maximum of 8000 total neighbors per system. If the number of interfaces multiplied by eight exceeds
the maximum, the system does not congure more than 8000.
• LLDP is not hitless.
Viewing the LLDP Conguration
To view the LLDP conguration, use the following command.
• Display the LLDP conguration.
CONFIGURATION or INTERFACE mode
show config
Example of Viewing LLDP Global Congurations
R1(conf)#protocol lldp
R1(conf-lldp)#show config
!
protocol lldp
advertise dot3-tlv max-frame-size
advertise management-tlv system-capabilities system-description
hello 10
no disable
R1(conf-lldp)#
Example of Viewing LLDP Interface Congurations
R1(conf-lldp)#exit
R1(conf)#interface tengigabitethernet 0/3
R1(conf-if-te-0/3)#show config
!
interface tengigabitEthernet 0/3
switchport
no shutdown
R1(conf-if-te-0/3)#protocol lldp
R1(conf-if-te-0/3-lldp)#show config
!
protocol lldp
R1(conf-if-te-0/3-lldp)#
Viewing Information Advertised by Adjacent LLDP
Agents
To view brief information about adjacent devices or to view all the information that neighbors are advertising, use the following commands.
• Display brief information about adjacent devices.
show lldp neighbors
• Display all of the information that neighbors are advertising.
show lldp neighbors detail
Example of Viewing Brief Information Advertised by Neighbors
Dell(conf-if-te-0/3-lldp)#end
Dell(conf-if-te-0/3)#do show lldp neighbors
Loc PortID Rem Host Name Rem Port Id Rem Chassis Id
-------------------------------------------------------------------------
Te 0/2 - TenGigabitEthernet 0/7 00:01:e8:06:95:3e
Te 0/3 - TenGigabitEthernet 0/8 00:01:e8:09:c2:4a
478
Link Layer Discovery Protocol (LLDP)