Wireshark · Wireshark-users: [Wireshark-users] Packets not captured, tcp acking lost segments. Large packets

["Michael Lynch" <michaellynch511@xxxxxxxxx>]

Hi All

I think I've found something everyone may be interested in...

In wireshark I am monitoring traffic of a SOAP application.

Upon transfer of a BLOB, wire shark is showing many "Tcp ACKed lost segment" 
packets.
On top of this there is no evidence of any of the SOAP data, other than the 
initial header.

Now I've search for this lost segment business, and no forums really seem to 
have much of a solution other than perhaps disabling sequence analysis.

However I think I have found the problem, but I have no understanding of the 
whats and whys.

In Microsoft Net Mon, the data packets ARE THERE!!!

i.e
Sent packet: Captured Frame Length = 4434, Media Type = Ethernet... 
Continuaion to packet #76.
Received packet: Ack

The received packet is the only packet that shows up in Wireshark! (I have 
cross referenced the Packet ID)
Wireshark is NOT COLLECTING LARGE PACKETS!!

I have no idea how packets THAT LARGE got onto the wire IN THE FIRST PLACE!!

What is going on??!! :)

Cheers
Michael