Update to the latest version. These tools frequently update their libpcap dependencies to support new link types. 2. Convert the PCAP File Using editcap
Yes. When capturing, disable mpacket mode on your interface (if your driver allows it): -pcap network type 276 unknown or unsupported-
These often use reserved DLT numbers (above 200) for vendor-specific headers. Your standard Ubuntu laptop's libpcap does not carry that plugin. Update to the latest version
to convert the file to a standard Ethernet link type, though this may lose metadata specific to the "cooked" header. Understanding Network Type 276 (SLL2) Convert the PCAP File Using editcap Yes
The most common fix is updating Wireshark. Support for Type 276 (SCLIB) was added in newer versions (Wireshark 3.x and later). If you are running an older version, the tool simply lacks the library to understand the header. 2. Manual Dissector Assignment
Here are a few options for a proper post, depending on where you are posting (e.g., a technical forum like Stack Overflow, a GitHub issue, or a community like Reddit).