BPDU Skewing

Unanswered Question
Oct 8th, 2008

I'm getting numerous "BPDU_SKEWING" for all 64 VLANs on a core 6509. I had the 6509 set as the root bridge for all VLANs, so in an attempt to correct the skewing, I configured the distribution switch in each VLAN as the root bridge. This made no difference.

Any ideas on how to troubleshoot this?

I have this problem too.
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Syed Iftekhar Ahmed Thu, 10/09/2008 - 00:04

BPDU skewed timing is very normal.

As long as skew timings are under 5 seconds there is nothing to worry about.

If you run a sniffer you will see that BPDUs are recieved {(hello Interval) +/- (few hunderd ms)}

BPDU skew detection is useful when skew time is significantly longer.

Syed Iftekhar Ahmed

drhague Thu, 10/09/2008 - 06:51

I realize skewing is normal. I used to get 4 or 5 BPDU skewing errors per day. I am now getting 2,000 to 3,000 BPDU skew errors per day. I'm guessing the increase is due to an increase in network traffic, but how do I troubleshoot/confirm this?


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