why udp client work when wirshark capture?

Posted by herzl shemuelian on Server Fault See other posts from Server Fault or by herzl shemuelian
Published on 2012-06-24T09:45:42Z Indexed on 2012/06/24 15:17 UTC
Read the original article Hit count: 260

Filed under:

networking

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wireshark

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tcpdump

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tcpreplay

I have two machine A,B windows 7 os .I connect them end to end and try run a performance test by using tcpreplay.

step 1) I check conectivity between to point by netcat

In A i run

 nc -lvup 5432

when I run on B

nc -u 1.2.3.4 5432

I can send data from B to A

step 2) when in I run tcpreplay in B

tcpreplay -i %0 myudp.pcap

in A I don't recevice any data . when I open wireshark in A then my nc can read data why? I check dst mac and dst ip in pcap file they are correct. is importan udp src mac or src ip for udp how that I open udp server ?

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