How to use full port multiplicity for an EtherNet switch

Torsten Knodt

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Sep 13, 2016, 10:48:13 AM9/13/16

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Hello,

I am trying to model a LAN both physically (EtherNet connection) and logical (VLANs) using SysML. For some routers I have one WAN port (no problem) and multiple identical LAN ports (multiplicity >4).

How can I model the connection to a specific LAN port?

Thanks in advance

Torsten Knodt

James Towers

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Sep 13, 2016, 11:19:42 PM9/13/16

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To model a specific configuration use an Internal Block Diagram (IBD) and create a part (typed by the router «block») and 4 parts (typed by whatever 'client' «block» you are connecting it to). You will need to model the 4 ports separately. You can then connect each port to their equivalent on each 'client' part

See Figure 9.11 on P93 of the SysML spec

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Shames, Peter M (312B)

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Sep 13, 2016, 11:24:45 PM9/13/16

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You will find some useful patterns for modeling logical and physical ports and the protocol stacks that implement interfaces in the attached paper.

Thanks, Peter

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INCOSE_IS_2016_interface_ports_96.pdf

Torsten Knodt

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Sep 21, 2016, 1:57:32 AM9/21/16

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Thanks for the hint James.
I did not have the example in my mind. I hoped there is a solution which does not require to model all variants of number of ports as I would like to use this for similar applications with more diversity.

Regards
Torsten

Torsten Knodt

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Sep 21, 2016, 1:57:32 AM9/21/16

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Hello Peter,
thanks for the paper, very good.
As a beginner I would have tried it differently, forgetting that the OSI layers exist orthogonal to each other.

Thanks
Torsten

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