You haw countenance at that feature's study and think, What is a BPDU Skew, and ground do I poverty to notice it? What we're actually attempting to notice are BPDUs that aren't existence relayed as apace as they should be.
After the stem denture election, the stem denture transmits BPDUs, and the non-root switches passage that BPDU downbound the atm tree. This should hap apace every around, since the stem denture module be sending a BPDU every digit seconds by choice (hello time), and the switches should passage the BDPUs alacritous sufficiency so every alter is sight a BPDU every digit seconds.
That's in a amend world, though, and there are plentitude of flawed networks discover there! You haw hit a laboring alter that can't constituent the mainframe to passage the BDPU quickly, or a BPDU haw meet only be forfeited in transmission. That two-second greeting instance continuance doesn't provide the switches such leeway, but we don't poverty the atm constellation recalculated unnecessarily either.
BDPU Skew Detection is strictly a asking feature. Skew Detection module not verify state to preclude atm recalculation when BDPUs are not existence relayed apace sufficiency by the switches, but it module beam a syslog communication revelation the meshwork chief of the problem. The turn of instance between when the BDPU should hit arrived and when it did come is referred to as skew time or BPDU latency.
A laboring mainframe could apace encounter itself overwhelmed if it had to beam a syslog communication for every BPDU conveying that's skewed. The syslog messages module be restricted to digit every 60 seconds, unless the skew time is at a grave level. In that case, the syslog communication module be dispatched directly with no one-per-minute limit.
And what is critical, according to BDPU Skew Detection? Any continuance greater than 1/2 of the MaxAge value, making the grave inclined instance take 10 seconds or greater.
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