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21 LLDP Commands
Link Layer Discovery Protocol (LLDP) is used to discover basic information about
neighboring devices on the local broadcast domain. LLDP is a Layer 2 protocol that
uses periodic broadcasts to advertise information about the sending device.
Advertised information is represented in Type Length Value (TLV) format according
to the IEEE 802.1AB standard, and can include details such as device identification,
capabilities and configuration settings. LLDP also defines how to store and
maintain information gathered about the neighboring network nodes it discovers.
Link Layer Discovery Protocol - Media Endpoint Discovery (LLDP-MED) is an
extension of LLDP intended for managing endpoint devices such as Voice over IP
phones and network switches. The LLDP-MED TLVs advertise information such as
network policy, power, inventory, and device location details. LLDP and LLDP-MED
information can be used by SNMP applications to simplify troubleshooting,
enhance network management, and maintain an accurate network topology.
Table 108: LLDP Commands
Command Function Mode
lldp Enables LLDP globally on the switch GC
lldp holdtime-multiplier Configures the time-to-live (TTL) value sent in LLDP
advertisements
GC
lldp med-fast-start-
count
Configures how many medFastStart packets are
transmitted
GC
lldp notification-interval Configures the allowed interval for sending SNMP
notifications about LLDP changes
GC
lldp refresh-interval Configures the periodic transmit interval for LLDP
advertisements
GC
lldp reinit-delay Configures the delay before attempting to re-
initialize after LLDP ports are disabled or the link
goes down
GC
lldp tx-delay Configures a delay between the successive
transmission of advertisements initiated by a
change in local LLDP MIB variables
GC
lldp admin-status Enables LLDP transmit, receive, or transmit and
receive mode on the specified port
IC
lldp basic-tlv
management-ip-address
Configures an LLDP-enabled port to advertise the
management address for this device
IC
lldp basic-tlv
port-description
Configures an LLDP-enabled port to advertise its
port description
IC
lldp basic-tlv
system-capabilities
Configures an LLDP-enabled port to advertise its
system capabilities
IC
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