Install guide

4 Software Reference
Optional TLVs You can configure the switch to send up to five optional TLVs alongside the
mandatory TLVs in each LLDPDU. The the following table describes the
optional TLVS from the LLDP-defined Basic Management TLV Set.
LLDPDU and TLV
error handling
LLDPDUs and TLVs that contain detectable errors are discarded.
If a TLV is not recognized, but contains no basic format errors, the LLDP agent
assumes that it is validated and stores it for possible later retrieval by network
management.
Transmission and Reception
LLDP is a one-way protocol. That is, the information transmitted in LLDPDUs
flows in one direction only, from one device to its neighbours, and the
communication ends there. Transmitted LLDPDUs do not solicit responses,
and received LLDPDUs do not solicit acknowledgement. LLDP agents cannot
solicit any information from other devices.
By default, when you enable LLDP on a port, both the transmission and
reception of LLDPDUs is enabled. However, you can separately enable and
disable transmission and reception. The LLDP agent can operate in any one of
the following user-defined modes:
■ Transmit-only mode
The agent can only transmit current information about the local system.
■ Receive-only mode
The agent can only receive current information about remote systems.
■ Transmit and receive mode
The agent can both transmit local information and receive remote
information.
See “Configuring LLDP” on page 8 for information on how to configure these
modes.
Optional TLV Description
Port description A description of the device’s port in alpha-numeric format.
System name The system's assigned name in alpha-numeric format.
System description A description of the device in alpha-numeric format. This
includes the system name, hardware versions, operating
system, and the networking software supported in the
device.
System capabilities The device’s router and bridge functions, and whether or
not these functions are currently enabled.
Management address The address of the local LLDP agent. This can be used to
obtain information related to the local device.
The set lldp managementaddress command lets you
specify an IPv4 address to advertise in this TLV. Otherwise
the switch’s MAC address is used.