Linux however, does provide the best flexibility by allowing the user to run a packet capture right off any Bluetooth interface. Windows does not provide any straight forward Bluetooth packet capturing mechanism that I am aware of. So, what do you do when connections are being stubborn? Do you try and reconnect and just hope for the best, or is there a better way to see what is going on with these stubborn connections? The answer to this probably depends on what operating system you are running. On macOS there is a tool called PacketLogger that allows you to identify the general flow of Bluetooth packets in and out of the machine. Generally it seems harder to connect two devices that are not from the same manufacturer. In my experience working with Bluetooth, I have seen connections go up fairly easily or be very stubborn and not want to connect at all. Bluetooth connections allow for smartphones, computers, cars, and even IoT devices to communicate all over a frequency that operates at ~ 2480 MHz. I wasn't able to figure out the latter, and I've figured out how to configure some pretty tricky GRE dissectors so I'm not a total amateur in that department.Opening a Bluetooth connection between two devices is a fast and energy efficient way to communicate data over a short distance. I don't know if the ERP dissector can be made to tell wireshark to do that of if there is a way to do it through custom dissectors. The reason it does not appears to be something with the header of the encapsulated 802.11 frame, which either is not a standard 802.11 header or wireshark has not been told to attach an 802.11 dissector to that chunk of data. ![]() You can manually parse through the data there, but it is a heck of a lot more convenient if Wireshark does that. ![]() What I am referring to is that Wireshark does not show me the ARP packet that is in the highlighted region (this particular screenshot shows a corrupted ARP packet, but the behavior is the same on pristine payload.) Instead of showing a "ARP" packet in the tree and allowing me to browse through the fields of the ARP packet, it just shows "QoS Data". If you'll look at the screenshot I posted you'l notice that the trace is indeed from a controller-side/ERM capture, and that the payload traffic is not encrypted. If you want to capture a 80mhz channel (802.11ac AP required), you would do this: If you want to capture a 40mhz channel you would do this: This is what I see from wireshark on my mac: The number after Radio must be 0 if I am capturing 5ghz and 1 if I am capturing 2.4ghz:Īp packet-capture raw-start ap-name Office-135 192.168.1.72 5555 0 radio 0 5555 matches the ERM port I am using in wireshark. The ip address (.72) is the ip address of my wired laptop. ![]() Below the AP-Name is the name of the Air monitor. Next, I need to stream all of the traffic from that access point on that radio to the wired laptop. 116 tuned to channel 161 (more on how to capture 40mhz and 80 mhz channels later) Below I have the air monitor with the ip address of. To start a packet capture, first you need to tune the AM so that it is only capturing on the channel you want it to. On the commandline of the controller, you will need (1) The ip address of the air monitor (2) the channel you want to capture on (3) the ip address of the wired laptop. in the filter box, just like you typed, type "aruba_erm" so that we only get Aruba packet capture traffic. Next, setup wireshark to do a packet capture on the wired interface of that laptop. Secondly, make sure the device you are capturing is an AM Wired connectivity between the Air Monitor and the Wired Laptop.įirst, make sure the version of wireshark has the Aruba ERM:Įdit> Wireshark Preferences => Protocols => Aruba ERM. On access point configured as an Air Monitor Wired Laptop with the latest Wireshark installed Let's make sure you have all your ducks lined up.
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