Useful if you want to compare two IPs for example. You may set multiple filters and display them simultaneously. since it’s average speed, when applying a display filter, the number of packets decreases, so we get a less accurate calculation of bandwidth. Also note the slight discrepancy between the bandwidth used in the captured packets and that in the displayed packets…. The second method is by using Statistics > SummaryĪgain we see the display filter, and the bandwidth used. You may of course apply more granular display filters for almost limitless possibilities of display. Since in this test we are observing HTTP, we drill down to TCP, and we observe the Mbits/sec, which is about 1.6 in this case:Īlso note the display filter, which means the statistics apply only to this TCP stream. This screen will give you a breakdown of bandwidth by protocol. The first method of seeing bandwidth used is by selecting the menu items: Statistics > Protocol Hierarchy This will isolate the IP / TCP traffic of interest Once you identify a packet belonging to the network flow you are interested in, right click on it > conversation filter > ip / tcp. Apply display filters in wireshark to display only the traffic you are interested in. In my case I started downloading the ubuntu image from their website, in the background leaving wireshark running. Once the download completes, get back to wireshark.ģ. Start a packet capture (preferably without capture filters, just in case we miss some traffic) and start the download (or the service you are testing) Of course, this will test HTTP bandwidth, but since wireshark can sniff any protocol, you can use anything you want for testing.Ģ. Open a web-browser and navigate to a site from where you can download large iso images. In this quick article we explore three different ways of measuring the bandwidthġ. Wireshark has several ways of showing the bandwidth being used, each method displays the information with different granularity / clarity. But when it comes to granularity and detail, almost nothing beats wireshark. There are of course several ways of measuring bandwidth usage from a particular PC. Update: For easy bandwidth visualization from packet captures, check out a web-based pcap parser we wrote:
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