One laptop and one mobile phone associated.įirst capture is taken with MacBook Pro with built-in 802.11a/b/g/n card only with Airtool. However, you can’t collect 802.11n/ac frames with 802.11a/b/g adapters or APs.ġst wave Aruba AP with 802.11ac operating on channel 48. When taking a packet capture, you should consider what protocols and APs are installed.Įvery new protocol is backward compatible with older technologies, which means you can collect 802.11a/b/g frames with 802.11n/ac adapters. Many companies have older 802.11n or even 802.11a/g APs deployed in the production environment. Nowadays there are 2nd wave 802.11ac capable APs in the market. I hope this clarifies why you LTE modem is not producing the information that you are interested in.There are many possibilities of taking packet capture to troubleshoot a wireless or wired network or application issues.īefore you take a packet capture, there are several tips, which can save you a lot of time and money.ġ. Also, be sure to have the latest 3GPP LTE decoder installed and enabled within Wireshark. If you have access, then you can use Wireshark to read TCPdump captures or tap into the Ethernet traffic promiscuously and capture traffic within Wireshark. For the control plane traffic on the S1-MME interface (between the eNB and Mobility Management Entity (MME)), you need access to the service provider's internal network.
To capture from the MAC layer and higher (Ethernet layer to IP/UDP/GTP-U/IP layers) then you would need access to the S1-U interface (between the eNB and Serving Gateway (S-GW)) for the user plane traffic.
The LTE modem is just the connection between the transceiver of the UE and the transceiver of the eNodeB or gNodeB (RRH or RU). This is why you are not seeing the layer 2 protocol stack components (MAC, RLC, PDCP, RRC) for the radio communications between the UE and the eNodeB (base station controller or BBU). You will need to make a direct USB connection to the mobile device from a PC or laptop and use the suite of Qualcomm tools If you are using a LTE modem, this will only be at the OSI lower layer 1 & any sublayers, primarily the physical layer (PHY). To capture LTE packets from a UE (mobile cell phone), you can use the Qualcomm tools like the previous person mentioned. Hi I know this is an old post from roughly three (3) years ago but I thought I should weigh in anyhow.
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