Re: iperf to test bandwidth, what setting are best?
Yes, but mainly because on switches you can see performance issues for bursty TCP applications. The reason is simple, if some packets get dropped because the buffer cannot contain it the side effect of TCP sliding window will kick in causing a reduction of the transmission window (trasmit rate slows down). Consequence of that is a reduced throughput and therefore an non optimal performance measurement.
Hey, it's been quite a time since we last met in a thread How are you?
Please allow me one question, or better say, a comment - and I am interesting in knowing what you think.
Testing the throughput of a switch, in my opinion, does not reveal much if only a single device attached to a switch generates the traffic load. The switching fabric of a switch has its capacity bigger by orders of magnitudes than any switchport on this switch. Loading a single ingress port even to its top is not going to put the switching matrix under any reasonable stress (except for broadcasting or multicasting, and event then I tend to believe that the load incurred on the switching matrix is negligible under this setup).
So to put the the switch under real stress would mean to have the switch fully connected (all switchports being connected to devices with traffic generators or traffic generator sinks) and have, by a rule of thumb, at least 50% of these devices send the traffic.
Am I thinking correct, or is this a wrong approach?
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.