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Asked: 2026-05-26T02:00:38+00:00

I am sending three types of packets on another machine in LAN using SENDIP

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I am sending three types of packets on another machine in LAN using SENDIP tool
I have specified min. length = 8 bytes and max.length = 512 bytes…

but….

when I send udp packets (min. length) and capture using tcpdump it shows pointer length=70 bytes.

when I send udp packets (min. length) tcpdump shows pointer length=574 bytes.

when I send icmp packets (min length),tcpdump shows length of first two packets as 80 and length of rest all packets as 66 bytes.

The pointer length I am getting through tcpdump is by using header information specified in the packet….

Why there is discrepancy between the results of sendip and tcpdump ???

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1 Answer

  1. Editorial Team

    Use the -s 0 option when running tcpdump. This will cause it to capture the entire frame.

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