Reference Guide

● Display brief information about adjacent devices.
show lldp neighbors
● Display all of the information that neighbors are advertising.
show lldp neighbors detail
The following example shows viewing brief information advertised by neighbors.
R1(conf-if-te-1/31-lldp)#end
R1(conf-if-te-1/31)#do show lldp neighbors
Loc PortID Rem Host Name Rem Port Id Rem Chassis Id
-------------------------------------------------------------------------
Te 1/21 - TengigabitEthernet 2/11 00:01:e8:06:95:3e
Te 1/31 - TengigabitEthernet 3/11 00:01:e8:09:c2:4a
The following example shows viewing detailed information advertised by neighbors.
R1#show lldp neighbors detail
========================================================================
Local Interface Te 1/21 has 1 neighbor
Total Frames Out: 6547
Total Frames In: 4136
Total Neighbor information Age outs: 0
Total Frames Discarded: 0
Total In Error Frames: 0
Total Unrecognized TLVs: 0
Total TLVs Discarded: 0
Next packet will be sent after 7 seconds
The neighbors are given below:
-----------------------------------------------------------------------
Remote Chassis ID Subtype: Mac address (4)
Remote Chassis ID: 00:01:e8:06:95:3e
Remote Port Subtype: Interface name (5)
Remote Port ID: TengigabitEthernet 2/11
Local Port ID: TengigabitEthernet 1/21
Locally assigned remote Neighbor Index: 4
Remote TTL: 120
Information valid for next 120 seconds
Time since last information change of this neighbor: 01:50:16
Remote MTU: 1554
Remote System Desc: Dell Force10 Networks Real Time Operating System Software
. Dell Force10 Operating System Version: 1.0. Dell Force10 App
lication Software Version: 7.5.1.0. Copyright (c) 19
99-Build Time: Thu Aug 9 01:05:51 PDT 2007
Existing System Capabilities: Repeater Bridge Router
Enabled System Capabilities: Repeater Bridge Router
Remote Port Vlan ID: 1
Port and Protocol Vlan ID: 1, Capability: Supported, Status: Enabled
---------------------------------------------------------------------------
========================================================================
Configuring LLDPDU Intervals
LLDPDUs are transmitted periodically; the default interval is 30 seconds.
To configure LLDPDU intervals, use the following command.
● Configure a non-default transmit interval.
CONFIGURATION mode or INTERFACE mode
hello
R1(conf)#protocol lldp
R1(conf-lldp)#show config
!
protocol lldp
advertise dot1-tlv port-protocol-vlan-id port-vlan-id
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Link Layer Discovery Protocol (LLDP)