Wireshark · Wireshark-users: Re: [Wireshark-users] tcp errors detection

[Abhik Sarkar <sarkar.abhik@xxxxxxxxx>]

Hi Victor,

Have a look at this page: http://www.wireshark.org/docs/dfref/t/tcp.html

You can use display filter on the following fields:
tcp.analysis.retransmission
tcp.analysis.fast_retransmission
tcp.checksum_bad

For TCP checksums, please also refer to this page: http://wiki.wireshark.org/TCP_Checksum_Verification
For retransmissions, also refer to this page: http://wiki.wireshark.org/PacketLoss

HTH
Abhik.

On Sun, Apr 18, 2010 at 4:17 PM, Victor lyamtsev <vlyamtsev@xxxxxxxxx> wrote:

Hi,

 how can i locate retransmission error for TCP sequence in wireshark capture ?
Should I look for ACK with repeated sequence number ?
For example:

[ACK] Seq = 1355 Ack = 13409 ...
[ACK] Seq = 1355 Ack = 13500

How can i detect checksum errors from the capture ?

Thanks,
-vvv
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