
User Manual Managed Switches
39
Rx Errors
The number of received LLDP frames containing some kind of error.
Frames Discarded
If a port receives an LLDP frame, and the switch's internal table has run
full, the LLDP frame is counted and discarded. This situation is known as
"Too Many Neighbors" in the LLDP standard. LLDP frames require a new
entry in the table when the Chassis ID or Remote Port ID is not already
contained within the table. Entries are removed from the table when a
given
interface’s links is down, an LLDP shutdown frame is received, or
when the entry ages out.
TLVs Discarded
Each LLDP frame can contain multiple pieces of information, known as
TLVs (Type Length Value). If a TLV is malformed, it will be counted and
discarded.
TLVs
Unrecognized
The number of well-formed TLVs, but with an unknown type value.
Org. Discarded
If an LLDP frame is received with an organizationally TLV but the TLV is
not supported, the TLV is counted and discarded.
Age-Outs
Each LLDP frame contains information about how long the LLDP
information is valid (age-out time). If no new LLDP frame is received
within the age-out time, the LLDP information is removed and the value
of the age-out counter is incremented.
Clear
If checked, the counters for the specific interface are cleared when the
button
Clear
is pressed.
3.3.10 Industrial Protocols
In this page the user can activate the industrial protocols supported by the switch: Modbus TCP,
Ethernet/IP and Profinet.
3.3.10.1 Modbus TCP
Introduction
MODBUS TCP is a protocol commonly used for the integration of a SCADA system. It is also a
vendor-neutral communication protocol used to monitor and control industrial automation equipment