I found a blocked MAC address (00-1A-B6-00-64-00) in MAC access list and after disabling the MAC filtering show this detail in Wireshark :
Frame 112389: 342 bytes on wire (2736 bits), 342 bytes captured (2736 bits) on interface 0 Ethernet II, Src: TexasIns_00:64:00 (00:1a:b6:00:64:00), Dst: Broadcast (ff:ff:ff:ff:ff:ff) Internet Protocol Version 4, Src: 0.0.0.0, Dst: 255.255.255.255 User Datagram Protocol, Src Port: 68, Dst Port: 67 Bootstrap Protocol Message type: Boot Request (1) Hardware type: Ethernet (0x01) Hardware address length: 6 Hops: 0 Transaction ID: 0x21c6e068 Seconds elapsed: 30831 Bootp flags: 0x0000 (Unicast) Client IP address: 0.0.0.0 Your (client) IP address: 0.0.0.0 Next server IP address: 0.0.0.0 Relay agent IP address: 0.0.0.0 Client MAC address: TexasIns_00:64:00 (00:1a:b6:00:64:00) Client hardware address padding: 00000000000000000000 Server host name: stellaris Boot file name not given Bootp vendor specific options: 000000000000000000000000000000000000000000000000...
I searched for
TexasIns_00 and found that this device is a USB packet sniffer.
Do you think this is true?