Layers and protocols
Report Port number (2) Link layer
(4) Transport layer
Function Description
PROFINET protocols
DCP
Discovery and
configuration pro‐
tocol
Not relevant (2) Ethernet II and
IEEE 802.1Q and
Ethertype 0x8892
(PROFINET)
Accessible no‐
des,
PROFINET
Discovery and
configuration
DCP is used by PROFI‐
NET to determine PRO‐
FINET devices and to
make basic settings.
DCP uses the special
multicast MAC address:
xx-xx-xx-01-0E-CF,
xx-xx-xx = Organization‐
ally Unique Identifier
LLDP
Link Layer Dis‐
covery protocol
Not relevant (2) Ethernet II and
IEEE 802.1Q and
Ethertype 0x88CC
(PROFINET)
PROFINET
Link Layer Dis‐
covery protocol
LLDP is used by PROFI‐
NET to determine and
manage neighborhood
relationships between
PROFINET devices.
LLDP uses the special
multicast MAC address:
01-80-C2-00-00-0E
MRP
Media Redun‐
dancy Protocol
Not relevant (2) Ethernet II and
IEEE 802.1Q and
Ethertype 0x88E3
(PROFINET)
PROFINET me‐
dium redundan‐
cy
MRP enables the control
of redundant routes
through a ring topology.
MRP uses the special
multicast MAC address:
xx-xx-xx-01-15-4E,
xx-xx-xx = Organization‐
ally Unique
Identifier
PTCP
Precision Trans‐
parent Clock Pro‐
tocol
Not relevant (2) Ethernet II and
IEEE 802.1Q and
Ethertype 0x8892
(PROFINET)
PROFINET
send clock and
time synchroni‐
sation, based
on IEEE 1588
PTC enables a time de‐
lay measurement
between RJ45 ports and
therefore the send cycle
synchronization and time
synchronization.
PTCP uses the special
multicast MAC address:
xx-xx-xx-01-0E-CF,
xx-xx-xx = Organization‐
ally Unique Identifier
PROFINET IO
data
Not relevant (2) Ethernet II and
IEEE 802.1Q and
Ethertype 0x8892
(PROFINET)
PROFINET Cy‐
clic IO data
transfer
The PROFINET IO tele‐
grams are used to cycli‐
cally transfer IO data be‐
tween the PROFINET IO
controller and IO devices
via Ethernet.
Communication
A.1 Communication
Industrial Security
216 Configuration Manual, 08/2017, A5E36912609A
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