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28-3
Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-02
Chapter 28 Configuring LLDP and LLDP-MED
Configuring LLDP and LLDP-MED
Note LLDP and LLDP-MED cannot operate simultaneously in a network. By default, a network device sends
only LLDP packets until it receives LLDP-MED packets from an endpoint device. The network device
then sends out LLDP-MED packets until it receives LLDP-only packets.
Configuring LLDP and LLDP-MED
This section contains this configuration information:
• Default LLDP Configuration, page 28-3
• Configuring LLDP Characteristics, page 28-3
• Disabling and Enabling LLDP Globally, page 28-4
• Disabling and Enabling LLDP on an Interface, page 28-5
• Configuring LLDP-MED TLVs, page 28-6
Default LLDP Configuration
Table 28-1 shows the default LLDP configuration. To change the default settings, use the LLDP global
configuration and LLDP interface configuration commands.
Configuring LLDP Characteristics
You can configure the frequency of LLDP updates, the amount of time to hold the information before
discarding it, and the initialization delay time. You can also select the LLDP and LLDP-MED TLVs to
be sent and received.
Beginning in privileged EXEC mode, follow these steps to configure these characteristics:
Note Steps 2 through 5 are optional and can be performed in any order.
Table 28-1 Default LLDP Configuration
Feature Default Setting
LLDP global state Enabled
LLDP holdtime (before discarding) 120 seconds
LLDP timer (packet update frequency) 30 seconds
LLDP reinitialization delay 2 seconds
LLDP tlv-select Enabled to send and receive all TLVs.
LLDP interface state Enabled
LLDP receive Enabled
LLDP transmit Enabled
LLDP med-tlv-select Enabled to send all LLDP-MED TLVs