Siemens SCALANCE W786-xPRO Operating Instructions Manual page 77

● If there are up to eight MAC addresses to be served downstream from the client, "Layer 2
This setting meets the requirements of industrial applications in which MAC address-based
communication is required with several devices downstream from the client. Clients with this
setting cannot connect to standard Wi-Fi devices and SCALANCE W700 access points with
firmware V3.0 or older.
Note
The layer 2 tunneling setting is available only with the following model variants:
• SCALANCE W78x in client mode
• SCALANCE W746-1PRO
• SCALANCE W746-1
• SCALANCE W747-1RR
• SCALANCE W747-1
Note
IP mapping table
If layer 2 tunneling is configured for a client, the IP mapping table is not displayed.
The SCALANCE W746-1PRO or W746-1 and SCALANCE W747-1RR or W747-1 devices as
well as SCALANCE W78x devices operating in client mode can provide access to a wireless
network for several Ethernet devices (IP mapping). For an access point with MAC filtering,
only one MAC address is visible to the SCALANCE W700 client, there can be no filtering
according to the MAC addresses of the Ethernet devices.
Note
Configuration limits
Several MAC nodes (for example PROFINET IO devices) are connected to the Ethernet
interface of a client module and the "AdoptMAC" parameter is set to "Layer 2 tunneling". The
following configuration limits apply for reliable communication:
• No more than 8 nodes may be connected downstream from the L2T client.
• When transferring cyclic PROFINET IO data in iPCF mode, remember that the sum of the
SCALANCE W786-xPRO
Operating Instructions, Release 08/2007, C79000-G8976-C221-02
– Automatically
The client adopts the source MAC address of the first frame that it receives over the
Ethernet interface.
– Manual entry by the user.
Tunneling" can be used:
user data of all nodes connected to the client must not exceed a value of 2,300 bytes per
cycle. This also includes the frame header. A SIMATIC user must therefore take into
account not only the net data during configuration but also the headers.
Configuration / project engineering
5.4 Basic Wizard
77