have previously reported similar ingestion failures when encountering this link type. How to Fix the Error
However, the error appears when you try to read such a file with a tool that . Wireshark versions before 3.x or older builds of Scapy, TShark, or libpcap may lack the dissector or the DLT mapping. -pcap network type 276 unknown or unsupported-
: It includes the actual name of the network interface (e.g., eth0 , wlan0 ) where the packet was captured. : It includes the actual name of the network interface (e
If you cannot upgrade tools, the pcap header to map DLT 276 to a supported type. Warning: This is not semantically correct unless your packets are actually Ethernet frames. For BLE packets, this will corrupt display. But if the file should be Ethernet, or you are desperate to parse something: For BLE packets, this will corrupt display
Error 276 indicates that the pcap reader encountered a link-layer type value of in the file header, but the reader’s internal table of supported types does not contain an entry for this value. The number 276 is not assigned in standard pcap.h definitions (which typically go up to ~281, but 276 remains uncommon or tool-specific). Common known values near 276 include: