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MAC adresses CPU317F-2PN/DP

Created by: azu at: 10/2/2012 1:22 PM (3 Replies)

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10/2/2012 1:22 PM	Rate (0)
azu Advanced Member Joined: 7/10/2008 Last visit: 10/29/2024 Posts: 32 Rating: (1)	A little question. Is it correct that aCPU317F-2PN/DP has two MAC adresses? The MAC mentioned on the front and a second one? (that would be MAC+1 I presume?). Hope somebody KNows the answer. ThanX Pietr

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10/2/2012 1:43 PM	Rate (0)
manmeet Gold Member Joined: 1/3/2006 Last visit: 2/19/2024 Posts: 726 Rating: (71)	Hi, Don't know where you can find second MAC address, but one way to find out is by getting connected to that port and using NCM S7. In NCM S7 goto 'Options' and then 'assign ethernet address' and then use 'Browse' button.If your connection is healthy (pg pc interface and all) it will find the MAC address for you.

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10/2/2012 7:27 PM	Rate (0)
daad Silver Member Joined: 10/31/2011 Last visit: 11/26/2024 Posts: 400 Rating: (5)	Dear AZU, Every device have only one MAC id.To identify its MAC id you can use one of the given option 1 by getting online by your PC/PG it will show all devices MAC id 2 by phsyical mentioned in front of the module 3 By Simatic NCM

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10/3/2012 7:31 AM	Rate (1)
fritz Diamond Expert Joined: 10/7/2005 Last visit: 1/15/2025 Posts: 3029 Rating: (1058)	azu Is it correct that aCPU317F-2PN/DP has two MAC adresses? The MAC mentioned on the front and a second one? (that would be MAC+1 I presume?). Hello azu that may indeed be correct as each port needs a unique MAC address for LLDP (Layer Link Discovery Protocol). You can disable this though by ticking "End of Topology discovery" in the properties of each PN port and below are a couple of links with more on this. How do you disable the "Link Layer Discovery Protocol" function at the ports of an IE CP of S7-300 or S7-400? LLDP protocol of Siemens 315-2PN/DP two MAC Addresses? I hope this helps
	Cheers fritz The advice and opinion given in this thread is that of the author and does not necessarily reflect the views of I S Systems Pty Limited. To find out how I S Systems can help you with your automation needs please visit www.issystems.com.au.
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