command FLapping

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which a command can show a flapping in extreme switch ?
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MUNIR ENG

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Posted 3 years ago

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David Coglianese, Embassador

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If you're talking about a port.
Sho port #:## info detail

Just above the vlans it shows link UPS and link downs
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MUNIR ENG

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thank your replay. but can you plz give some example ? where i can see the Flapping 
(Edited)
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Vellachery, Sumeesh, Employee

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Munir,

I have attached a snapshot for your reference, the one which i have encircled.



In addition to it, check the "show logs" on the switch for checking the link flaps.
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Henrique, Employee

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Hi Munir, if you are using LAG you can also use the command show ports sharing em check the values for Link Up Transitions as follows:

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MUNIR ENG

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great full, how i can following a flapping and fix it ?  
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Patrick Voss, Alum

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Hi Munir,

Flapping implies that the port is going up and down very quickly. The logs should show this with a time stamp. The commands provided above will also provide the last time it went down and came up along with a counter for how many times. This data is typically cleared after a reboot or if the command "clear counters" is entered.