Cisco Nexus 5500 Series - Page 63

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Cisco Nexus 5500 Series NX-OS Layer 2 Interfaces Command Reference
OL-27880-02
Chapter F Commands
feature lldp
feature lldp
The Link Layer Discovery Protocol (LLDP), which is a neighbor discovery protocol that is used for
network devices to advertise information about themselves to other devices on the network, is enabled
on the switch by default.
Command Default Enabled
Command History
Usage Guidelines You cannot enable or disable LLDP on a Cisco Nexus device. LLDP is enabled on the switch by default.
However, the feature lldp command shows as part of the running configuration on the switch, as shown
below:
switch# show running-config
!Command: show running-config
!Time: Wed Jan 30 12:36:03 2013
version 6.02N1(1)
feature telnet
feature lldp
username admin password 5 $1$d8lkfqC8$4VfRuOoZTKvCtTq8VAKbq/ role network-admin
no password strength-check
ip domain-lookup
hostname switch
class-map type qos class-fcoe
class-map type qos match-all c1
match cos 1
<--Output truncated-->
switch#
The Cisco Discovery Protocol (CDP) is a device discovery protocol that runs over Layer 2 (the data link
layer) on all Cisco-manufactured devices (routers, bridges, access servers, and switches). CDP allows
network management applications to automatically discover and learn about other Cisco devices
connected to the network.
To support non-Cisco devices and to allow for interoperability between other devices, the switch
supports the Link Layer Discovery Protocol (LLDP). LLDP is a neighbor discovery protocol that is used
for network devices to advertise information about themselves to other devices on the network. This
protocol runs over the data-link layer, which allows two systems running different network layer
protocols to learn about each other.
Related Commands
Release Modification
5.2(1)N1(1) This command was introduced.
Command Description
lldp Configures the global LLDP options on the switch.
lldp (Interface) Configures the LLDP feature on an interface.
show feature Displays that LLDP is enabled on the switch.