Lab Objective:
The objective of this lab exercise is for you to learn and understand how to enable the LLDP protocol on a Cisco Network.
Lab Purpose:
Configuring and applying the Link Layer Discovery Protocol (LLDP) allows network devices to discover other network devices directly connected to them. This is a fundamental skill that provides the same benefits that CDP does, but it’s also compatible with non-Cisco equipment. As a Cisco engineer, as well as in the Cisco CCNA exam, you will be expected to know how to enable LLDP in your network.
Certification Level:
This lab is suitable for CCENT certification exam preparation.
Lab Difficulty:
This lab has a difficulty rating of 5/10.
Readiness Assessment:
When you are ready for your certification exam, you should complete this lab in no more than 20 minutes.
Lab Topology:
Please use the following topology to complete this lab exercise:
Task 1:
Configure the hostnames on R1 and R3 as illustrated in the topology.
Task 2:
Configure the IP addresses on the Ethernet interfaces of R1 and R3 as illustrated in the topology. There is no need to configure the Loopback interfaces for this lab.
Task 3:
Disable CDP globally on both routers and enable LLDP (it’s disabled by default).
Task 4:
Make sure that both R1 and R3 have found each other via their Ethernet links using LLDP.
Task5:
Now disable one of the interfaces to prevent it from sending LLDP traffic.
Configuration and Verification
Task 1:
For reference information on configuring hostnames, please refer to earlier labs.
Task 2:
For reference information on configuring IP addresses, please refer to earlier labs.
Task 3:
R1#config t Enter configuration commands, one per line. End with CTRL/Z. R1(config)#no cdp run R1(config)#lldp run R1(config)#end R1# R3#conf t Enter configuration commands, one per line. End with CTRL/Z. R3(config)#no cdp run R1(config)#lldp run R3(config)#end R3#
Task 4:
R1#show lldp neighbors Capability codes: (R) Router, (B) Bridge, (T) Telephone, (C) DOCSIS Cable Device (W) WLAN Access Point, (P) Repeater, (S) Station, (O) Other Device ID Local Intf Hold-time Capability Port ID R3 Fa0/0 120 R Fa0/0 Total entries displayed: 1 R3#show lldp neighbors Capability codes: (R) Router, (B) Bridge, (T) Telephone, (C) DOCSIS Cable Device (W) WLAN Access Point, (P) Repeater, (S) Station, (O) Other Device ID Local Intf Hold-time Capability Port ID R1 Fa0/0 120 R Fa0/0 Total entries displayed: 1
Task 5:
Router(config-if)#no lldp transmit