Wireshark-users: Re: [Wireshark-users] Spanning tree can slow the network?
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From: Jim Aragon <Jim@xxxxxxxxxxxxxxxxx>
Date: Sat, 14 Jul 2012 12:27:00 -0700
At 10:41 AM 7/14/2012, you wrote:

But I don't understand why this pause occurs always on this sequence:

716    8.713191000    192.168.1.12    192.168.1.2    TCP    54    50014 > microsoft-ds [ACK] Seq=47596 Ack=55126 Win=63153 Len=0
717    9.999665000    NexcomIn_1e:63:47    Spanning-tree-(for-bridges)_00    STP    60    Conf. Root = 32768/0/00:10:f3:1e:63:45  Cost = 0  Port = 0x8003
718    10.689862000    192.168.1.12    192.168.1.2    TCP    362    [TCP segment of a reassembled PDU]
719    10.690663000    192.168.1.2    192.168.1.12    HTTP    79    HTTP/1.1 100 Continue

More than one second to receive another packet from the server (192.168.1.2) , I think this cannot be normal behaviour.

It would be easier for us to possibly analyze what's going on if you'd post an actual capture file somewhere (perhaps www.cloudshark.org) instead of a partial text listing. Try to capture the start of the conversation so that the TCP three-way handshake is present in the trace file. If necessary, remove any confidential information from the trace file. Include the full STP frames.

Jim