...making Linux just a little more fun!
[ In reference to "VPN Networking" in LG#149 ]
This article may give me a start, but I am looking for something a little closer to my requirements. I need to emulate a network of embedded devices, preferably by creating a pseudo-router with something that acts like those devices behind it. Every article I have seen suggests putting the target devices into virtual machines with a router VM in front. But the embedded devices I need to emulate are neither PCs nor OS based. We buy the primary device from another company, and it comes with a Rabbit 2000 and Ethernet interface. That company provides us with firmware to our specifications, which we simply write into flash memory with utilities they also provide. I need to emulate a network of 2000 of these devices to do a decent load test on our servers. This emulation needs to duplicate the behavior of the TCP/IP stack as well as initiate socket connections, data requests and transactions just as the target devices do. Some of this behavior will have to be characterized by analyzing Wireshark traces and some experimentation.
Any suggestions?
Thank you,
Bob McConnell
-- Principal Communications Programmer The CBORD Group, Inc. 61 Brown Road Ithaca NY, 14850 Phone 607 257-2410 FAX 607 257-1902 Email rvm@cbord.com Web www.cbord.com
Udo Pütz [udo at muon.de]
Am Dienstag, den 15.04.2008, 09:09 -0400 schrieb Bob McConnell:
> This article may give me a start, but I am looking for something a > little closer to my requirements. I need to emulate a network of > embedded devices, preferably by creating a pseudo-router with something > that acts like those devices behind it. Every article I have seen > suggests putting the target devices into virtual machines with a router > VM in front. But the embedded devices I need to emulate are neither PCs > nor OS based. We buy the primary device from another company, and it > comes with a Rabbit 2000 and Ethernet interface. That company provides > us with firmware to our specifications, which we simply write into flash > memory with utilities they also provide. I need to emulate a network of > 2000 of these devices to do a decent load test on our servers. This > emulation needs to duplicate the behavior of the TCP/IP stack as well as > initiate socket connections, data requests and transactions just as the > target devices do. Some of this behavior will have to be characterized > by analyzing Wireshark traces and some experimentation.
You could go about and change qemu to match the devices you have. Since qemu already has a wide range of network card (chips) emulated and also emulates lots of processors (i386, arm, mips, sparc, alpha) you will have lots of code examples.
Cheers
Robos