However, the "& 0xffffff00" expression masks off the fourth byte. Directions: Type or paste in a list of OUIs, MAC addresses, or descriptions below. It uses the Wireshark manufacturer database, which is a list of OUIs and MAC addresses compiled from a number of sources. Unfortunately, you want to examine three bytes, but you can only put 1, 2, or 4 after the colon, so three is not a valid value. The Wireshark OUI lookup tool provides an easy way to look up OUIs and other MAC address prefixes. In the capture filter expressions "ether" and "ether", 0 and 6 are the starting bytes for the destination MAC address field and the source MAC address field respectively, and 4 is the number of bytes to examine. To capture packets where either the source or destination MAC address starts with 00:0C:22: But if you know where in the MAC address field those three bytes will be, you can use a byte-offset capture filter.
You probably can't create a capture filter for MAC addresses containing 00:0C:22 anywhere in the MAC address fields. You said, "I want to capture all traffic from devices with MAC address containing 00:0C:22."
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