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Channel (frequency): As a wireless LAN may support anywhere from 3 to 25 different channels, it’s crucial to know exactly which channel(s) your capture was taken from.

Some important physical layer values you need to be aware of are channel, data rate, and signal strength. It is important to get an understanding of the physical layer of the capture before diving into the capture to analyze the upper layers. Unlike wired packet analysis, the wireless physical layer is more complex. There are several important considerations, like the ever-evolving 802.11 wireless protocol, wireless signal interference, and the continuous sniffing for wireless packets in your radio environment. This document will discuss the analysis of wireless packets and challenges in analyzing them, with the help of packet capture examples. There are multiple considerations in wireless communication which make it different as compared to wired packet captures. Wireless packet captures are an important part of troubleshooting complex wireless connectivity issues. This document can be a good tool to reference if you have acquired wireless packet captures and need to analyze them.

The main purpose of the document is to give an understanding of the 802.11 packet structure and how to analyze wireless packet captures. Open Authentication for Troubleshooting.Monitor Mode for Wireless Packet Captures.There are some great Wireless traffic filters on wireshark website as well as on WiFi Ninjas Blog Wireshark filters. Wlan.fc.type_subtype = 0x04 & wlan_radio.signal_dbm < -75 Wlan.fc.type_subtype = 0x05 & wlan_radio.signal_dbm < -75 (wlan.fc.type_subtype=3)&(=55)ĭisplay Filters related Weak signals: wlan_radio.signal_dbm < -67 Wireshark Display Filters related 802.11 k,v,r traffic: 802.11 k,v,r Wireshark Display Filters related Retries: retry Wireshark Display Filters related Data frames traffic: data frames Wireshark Display Filters related Control frames traffic: control frames Wireshark display filters: management frames Wireshark Display Filters related management traffic: It was shared as image file so I decided add different filters together and type here so people can just copy paste the filters instead having to type again themselves. These display filters are already been shared by clear to send . Wireshark has two filtering languages: One used when capturing packets, and one used when displaying packets.