Wireshark mac address of source3/5/2023 ![]() ![]() Therefore, in order to keep the network alive, the switch will send out. Categories Featured About Register Login Submit a product. Once the CAM table is filled, the switch no longer accepts new MAC addresses. Like the MAC address, The LLC logical link control protocol is also layer 2, but is upper sublayer of Data Link Layer and won't affect the ability to capture the traffic unless you specify llc as a filter and there isn't any llc traffic, then you would get the blank screen. Compare Change MAC Address VS Wireshark and find out whats different, what people are saying, and what are their alternatives. Also, since you're attempting to use the resolved Ethernet address (with the OUI ), then you'll actually need to use eth.srcresolved'CompalIndc:d9:3e', since eth.src is for unresolved MAC addresses. ![]() (I'm assuming the traffic you are looking for is traveling to a destination on another switch, outside the network, or at least to your gateway).īy specifying the MAC address filter, eth.addr eq xx:xx:xx:xx:xx:xx you are filtering for all traffic to and from that associated MAC address. That is an Ethernet MAC address, not an IP address, so you filter it with eth.src, not ip.src. If you are trying to trace MAC's on the switch you are also connected to, then you'll want to sniff from a port which is spanned/mirrored to the port which has inbound/outbound traffic of that switch, so that you will see all the traffic coming in and out of the switch. For instance, tshark -i 1 -R "eth.addr eq xx:xx:xx:xx:xx:xx or eth.addr eq xx:xx:xx:xx:xx:xx" ![]() You can use a list for your MAC's in one display filter, but not a range, unless you switch to IP's instead of MAC's. If you are using a display filter of eth.addr = xx:xx:xx:xx:xx:xx and you are not seeing any information being displayed/sniffed, then the traffic for that MAC address is not passing through the port you're sniffing on. ![]()
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