On Mon, Jul 14, 2014 at 10:47 PM, Robert Rolf wro= te: > It would be helpful if you told us WHY you want to do A/B switching on > a network cable. There are many ways to do this. What I'm looking to be able to do is segregate certain networked devices. The devices I'm using connect together to form "sessions". Sometimes it is useful to have two pools of devices working separately, and others it makes more sense to have them all connected together. At the moment I do this by having a network switch for each segment, and I have a simple cable jumper that I'm plugging or unplugging. > Do you need to do it programatically or by an external control signal? Probably by external control signal. Programmatically would be cool, but I'm not a network programmer, so the chances of me figuring that out are slim. > I would suggest that a 'hack free' way would be to use a managed switch. > Then you just turn the A and B (or C etc) port on or off with the > switch manager tool. > e.g. your feed comes in, and you enable/disable the appropriate > port(s) or adjust > the ACL (access control list) to block the destination MAC of ports > you don't want data going to). > using standard SNMP tools. I've been thinking about that actually. Does each manufacturer release their own switch manager tool, or is it usually a web based thing? > Since you probably need a network switch anyway, its a small incremental = cost. > http://www.memoryexpress.com/Products/MX30082 Thanks for the tip! Josh --=20 A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools. -Douglas Adams --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .