Wireshark mailing list archives
Re: Spanning tree can slow the network?
From: Alex Lindberg <alindber () yahoo com>
Date: Sat, 14 Jul 2012 19:59:21 -0500
Perhaps I missed it, but how are these packets captured? Port mirroring/spanning may have different packets than an inline probe or wireshark running on the host machine. Also if wireshark is running on a Windows host there have been issues with packets containing 802.1q (vlan) data. Alex Lindberg Andrea <an.celli () tiscali it> wrote: Hello Jim, here is my first cut of tracefile: http://www.cloudshark.org/captures/4b8cf621d044 It contains conversation from when I start application, and on row 717 there is first spanning tree . I hope in your supporta Thanks Andrew Jim Aragon <Jim () agdatasystems com> ha scritto: 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
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Current thread:
- Re: Spanning tree can slow the network? Andrea (Jul 14)
- <Possible follow-ups>
- Re: Spanning tree can slow the network? Alex Lindberg (Jul 14)