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SOFTNET RNA with non Siemens switches

1/26/2015 11:39 PM	Rate (0)
Mist9 Advanced Member Joined: 3/19/2012 Last visit: 8/12/2025 Posts: 18 Rating: (1)	Hi, Is SOFTNET RNA supported with non Siemens switches. I have checked the compatible device list, it shows only Siemens Products. If compatible, what specificationshould we note when using it. What failure may occurwhen used in case of non-compatible. I have used Non-Siemens switches with SOFNET RNA in past for internal testing. Configuring Redundant Network, I dint find any failure. May be because we did notcheck withvarious failure scenarios. Thank you,

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1/27/2015 1:43 AM	Rate (0)
fritz Diamond Expert Joined: 10/7/2005 Last visit: 9/14/2025 Posts: 3049 Rating: (1062)	Hello Pinkesh M Siemens RNA (Redundant Network Access) is PRP (Parallel Redundancy Protocol)asdescribed in the IEC 62439-3 (and only Siemens knows why they invented a new acronym for this instead of using PRP). As PRP adds 6 Bytes to the Ethernet frame though, the maximum (802.1Q VLAN tagged) Ethernet frame length of 1522 Bytes can be exceeded so the switches need to support oversized frames. Apart from Siemens switches likeRuggedcom and Scalance, ABB, Hirschmann and many many others offer these switches that support oversized frames too. If you though want to add SAN's (Single Attached Nodes) to your PRP network, you'llobviosuly need to add a switch that supports this (e.g. Scalance X204-RNA). 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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This contribution was helpful to 1 thankful Users Mist9