How to connect multiple instruments via TCP/IP to a computer who has only one ethernet port?

[pellet8]

I've heard a router is the solution. What kind of router do I need? Thanks.

Message Edited by pellet8 on 07-16-2008 08:03 AM

[wd8ivl]

In my applications, because IT wants me to keep the instruments and I/O off of the company network (which I think is a real good idea anayway), I install a second NIC and an ethernet switch like a Netgear FS105.  I configure the 2nd NIC with a fixed IP address.  I then use it to control my Fieldpoint, a Keithley DMM and a Tektronix scope.

Mike

[ShotSimon]

In our group we have started using USB to ethernet cards (Belkin) with fixed ip's and Netgear FS105 switches.  These provide isolation between your device under test and your ethernet card and also can be moved around quickly from PC to PC.  -SS 

[smercurio_fc]

What's the difference between a Hub, a Switch and a Router?

[pellet8]

Thank you guys for the reply.

If I use a NETGEAR FS105, how is each intrument identified on the computer?  Are they assigned with different IP addresses?

[wd8ivl]

Yes, each instrument has a unique I.P. address.

[Joseph_Loo]

Hub is like a piece of cable with all the devices attached. Every device will see all the packets.

Switch will only send information to the relevant device. The other devices will not see any packets that are not addressed to the device. Generally, everything is on the same sub-network.

Router will break the ethernet into 2 sub-networks. One outside and one inside. Most routers will do packet filtering and limit the packets the inside network will see. In addition it can provide dhcp services.