2011/5/31 James Bensley <[email protected]> > Hi list, > > Is there any way from either a router or L3 switch I can saturate a > line/link? I don't want to use a computer or external device. >
Network appliances just don't have the chops to generate line rate data. You need an external device to get anything accurate. Even the high end platforms have only PIII cpu's most of which is dedicated to something other than packet generation. I wouldn't trust any results based on packets generated from a router. > > Lets pretend that $provider has given me a 1Gbps up-link to a device > which terminates various 100 Mbps links, so having a pc with software > to pump out 1Gbps would be no good. You could have a pc with software pump out 100M to match your CIR. iperf and other tools are pretty simple. Then there are ethernet test sets that will generate realistic traffic rates and patterns based on standards link IMIX. I've also generated traffic in the past by causing a contained bridging loop somewhere. > Since most people have up links > many times faster that most other ports on their routers/switches how > can I test the up link throughput from the device. > Just set the test parameters to match the CIR/rate-limit and not the port speed. > > If for what ever reason I had 1Gbps access ports with a 1Gbps up link > I could use a pc/hardware traffic generator and test the link and for > example routers ability to policy route and filter at 1Gbps but I just > want to test the physical link its self for its top end throughput. > Which top end the physical 1G or the logical 100M? Again, I'd use some sort of load generation software or an ethernet test set. Even if you had a CRS or something to generate the data I doubt it could generate 1Gbps from the processor without keeling over. HTH, Keegan _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
