In the registry of standard PCAP link-layer types (maintained by the tcpdump.org project), every number corresponds to a specific protocol encapsulation. When your analysis tool throws this error, it means the PCAP file header claims the data is encapsulated using protocol number 276, but the version of the tool you are using does not have a dissector (a decoder) built-in for that specific number.
Alternatively, use tcpdump (if it doesn't crash):
: Newer versions of tcpdump (especially on Linux distributions like Kali or Ubuntu) often default to the SLL2 format when capturing on the -i any interface.
In the registry of standard PCAP link-layer types (maintained by the tcpdump.org project), every number corresponds to a specific protocol encapsulation. When your analysis tool throws this error, it means the PCAP file header claims the data is encapsulated using protocol number 276, but the version of the tool you are using does not have a dissector (a decoder) built-in for that specific number.
Alternatively, use tcpdump (if it doesn't crash): -pcap network type 276 unknown or unsupported-
: Newer versions of tcpdump (especially on Linux distributions like Kali or Ubuntu) often default to the SLL2 format when capturing on the -i any interface. In the registry of standard PCAP link-layer types