I have recently come across a packet capture where the
Ethernet FCS was included but the FCS value was incorrect (for whatever reason
the transmitting device was padding the Ethernet header). Our team has
worked with the manufacturer and resolved the issue. My question is why
did Wireshark not flag this as an error? Is this something I can
configure Wireshark to do with a coloring rule and/or can this be changed on
future releases? I attempted the coloring rule but under the Ethernet
protocol I did not see FCS as an option. I do understand FCS is not always
captured but if it is and it is incorrect I would like to see this identified
by Wireshark if possible.
Source:
Cisco_17:c8:80 (00:23:04:17:c8:80)
Type:
IP (0x0800)
Trailer:
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC...
Frame
check sequence: 0xcccccccc [incorrect, should be 0x15ecccb4]
Thanks!!
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