8/26/2010 9:06 AM | |
Joined: 10/7/2005 Last visit: 10/14/2024 Posts: 3024 Rating: (1054)
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Hello geertn not being a CCIE myself,I won't attempt to argue with the "OUT OF STANDARDS" point that you make, but can tell you though that your observations about the "multiple" MAC addresses may very well be correct. This is a "feature" that is used for topology discovery in PROFINET IO systems where the device (e.g. CP, Switch) has the "base"MAC address and each physical interface of ithas an individual MAC address (automatically "+1" assigned from thedevices "base"MAC address). If this "feature" gives you grief, you can disable it and you can find our more about a the link below: How do you disable the "Link Layer Discovery Protocol" function at the ports of an IE CP of S7-300 or S7-400? As for your third question ("a LOT of devices are using ALL the same mac address"), I can only speculateif the person who configured your PLC's did this (you can assign/change theMAC addresses for certain Siemens devices). I hope this helps |
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8/27/2010 1:04 AM | |
Posts: 5822 Rating: (412)
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Hello, please let me also answer your questions: to 1: To identify in detail which device is connected where exactly. You may ask what do you need this information for... well, if you want to use PROFINET IO IRT and you want it as best as possible you need to know the exact structure and the exact cable length between the nodes. Therefore you need it. If you want you can disable the LLDP function. This is no problem within the HW Config. to 2: You answer your question yourself... sending station or port. Do you agree, this is standard? So, if each SIMATIC node with an ERTEC 200 or ERTEC 400 Controller has 3 or 5 MAC address... each Port, even the port directed to the node itself... has it's own MAC. This is standard. to 3: About your MAC I guess you have a lot of a little bit older SCALANCE X200 IRTSwitches, don't you? Check this manual: Industrial Ethernet Switches SCALANCE X-200 / XF-200 Operating Instructions Page 204 Chapter: 6.3.5.31 The "Switch LLDP" WBM menu I guess... Port 1 is your favourite, isn't it? I am sorry. Best regards J_Bell |
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