ProCurve excessive STP topology changes
March 25th, 2008
Recently a colleque of mine noticed something strange in the STP configuration from a couple of HP ProCurve switches. He had a network, which was configured by another party, with switches running MST en RSTP mode spanning-tree. He noticed a lot of topology changes in the configuration, but couldn’t find out where they were coming from.
Yesterday I came in another native HP ProCurve environment with two 5412zl switches en multiple 3500yl switches. All the switches have MST configured and I noticed the same strange behavior. One switch had an uptime from 29 days, but had more than 700.000 topology changes. The last change was 11 hours ago. I checked the logging and noticed that ports going up and down, aren’t counted as a topology change. I have looked at different forums, but cannot find a reason for the topology changes.
My colleque and I will try to investigate the problem further, when we have some time left ;-). I hope we can come back on this issue, but maybe some of you already noticed the same problems and know the cause of it….
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2 Responses to “ProCurve excessive STP topology changes”
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May 11th, 2010 at 4:45 pm
I see the same issue, but cant figure out what the cause is. Have you had any luck?
Anthony
May 20th, 2010 at 9:15 am
I have noticed the same problem. I tried to move access ports to admin-edge-port and bpdu-protection against auto, but nothing help=(…