Wireshark - connected to an ERSPAN-capable “destination” switch, but what if you don’t? But There’s an Easier Way. This works great if you have a dedicated system running a packet sniffer - e.g. The traffic is encapsulated in generic routing encapsulation (GRE) and is, therefore, routable across a layer 3 network between the “source” switch and the “destination” switch. ERSPAN mirrors traffic on one or more “source” ports and delivers the mirrored traffic to one or more “destination” ports on another switch. ERSPAN is an acronym that stands for encapsulated remote switched port analyzer. ERSPAN is awesome and in this article, I’ll show you why.
In some cases it could replace RSPAN, but since it’s only available on Cisco Nexus switches, newer Catalyst 6500s, Cisco ASR routers, and other “high end” devices, I determined that it really had limited uses.īut I was wrong. This integration is much easier than the previous one.When I first looked at the documentation for ERSPAN I could imagine some uses for it. Acrylic Wi-Fi Sniffer and WiFi interfaces in Wireshark If you want to know more about capture modes or discover the features that these two alternatives provide within Acrylic Wi-Fi products, please visit “Monitor mode and native capture mode in Acrylic Wi-Fi” article.
Because it has been designed as an economical and easily configurable alternative to AirPCAP hardware, it can capture all data available with this type of card, including SNR values, and is compatible with the latest 802.11ac standard in all channel widths (20, 40, 80 and 160 MHz). Acrylic Wi-Fi SnifferĪcrylic Wi-Fi Sniffer also enables Wi-Fi packet capture in monitor mode with Wireshark on Windows (in the latest versions Wireshark 3.0.0 or higher) and with other Acrylic Wi-Fi products such as Heatmaps or Professional. However these cards have been discontinued and are deprecated, so they cannot capture traffic on networks running the latest WiFi standards (802.11ac).Īcrylic Wi-Fi Sniffer is an innovative alternative for capturing Wi-Fi traffic in monitor mode from Windows, including the latest 802.11ac standard. In other words, it allows capturing WiFi network traffic in promiscuous mode on a WiFi network. However, Wireshark includes Airpcap support, a special -and costly- set of WiFi hardware that supports WiFi traffic monitoring in monitor mode. Winpcap Capture Limitations and WiFi traffic on WiresharkĬapture is mostly limited by Winpcap and not by Wireshark. Monitor mode for Windows using Wireshark is not supported by default. Winpcap libraries are not intended to work with WiFi network cards, therefore they do not support WiFi network traffic capturing using Wireshark on Windows. Wireshark uses libpcap or Winpcap libraries to capture network traffic on Windows.
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