Roaming Analysis using only a Mac and Wireshark August 4, 2018There are many ways to examine the roaming performance of a Wi-Fi client. Perhaps the gold standard is to follow the client with a laptop running Omnipeek and several Wi-Fi adapters all capturing frames on different channels. I’m also impressed with 7signal’s recent update to Mobile Eye which now logs roaming data as well. But … Continue reading "Roaming Analysis using only a Mac and Wireshark"Beware of mDNS Floods from Buggy Android Clients January 15, 2018Recently, I discovered a large increase in multicast traffic on an enterprise Cisco WLAN. This increase was large enough to cause packet loss in several areas where bandwidth is limited, usually at the WAN edge. While throughput remained within the acceptable range for a circuit, an extremely high packet rate was overwhelming the edge device’s … Continue reading "Beware of mDNS Floods from Buggy Android Clients"