Expand the list on the left and scroll down to SOME/IP .
When capturing traffic via a specific device name (like eth0 or wlan0 ), packets contain standard Ethernet headers. However, when using the flag -i any on Linux, the kernel captures packets across vastly different interface types simultaneously (e.g., Ethernet, Wi-Fi, loopback, and cellular).
: This integer tells the packet analyzer (like Wireshark) how to decode the very first layer of bytes in each captured packet.
If it prints 01140000 , that's hex for 0x00000114 = 276 . -pcap network type 276 unknown or unsupported-
Use xxd or a custom script to dump packet bytes, then rebuild:
Some proprietary analysis tools (e.g., from Cisco, Arista, or certain SD-WAN probes) assign custom DLT values (often in the range 200–300) for internal telemetry. DLT 276 might be repurposed in your specific environment—though officially it's Nordic BLE, not all vendors follow the registry.
Capturing directly on eth0 , wlan0 , or enp3s0 forces the capture utility to record native Ethernet headers (DLT 1), which all analysis tools universally support. 3. Force an Older Cooked Format During Capture Expand the list on the left and scroll down to SOME/IP
: Download the newest installer from the official Wireshark Downloads page and run it to overwrite your older installation. Solution 3: Re-capture Packages Safely
tool frequently generates captures using this modern Link-Layer type. Nick vs Networking How to Fix
Depending on your engineering environment, choose one of the following methods to resolve the error and read your data. Method 1: Update Your Analysis Software (Recommended) : This integer tells the packet analyzer (like
Network type 276 corresponds to LINKTYPE_SOME_IP or WTAP_ENCAP_SOME_IP .
For further reading:
: It is an updated version of the original SLL (Type 113) and was introduced to support longer interface names and more metadata . Why This Error Occurs
Or perhaps a variant: pcap_open_offline: network type 276 unknown or unsupported