command FLapping


which a command can show a flapping in extreme switch ?

6 replies

If you're talking about a port. Sho port #:## info detail Just above the vlans it shows link UPS and link downs
David Coglianese wrote:

If you're talking about a port. Sho port #:## info detail Just above the vlans it shows link UPS and link downs

thank your replay. but can you plz give some example ? where i can see the Flapping
Userlevel 5
David Coglianese wrote:

If you're talking about a port. Sho port #:## info detail Just above the vlans it shows link UPS and link downs

Munir,

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



[i]In addition to it, check the "show logs" on the switch for checking the link flaps.
Userlevel 6
David Coglianese wrote:

If you're talking about a port. Sho port #:## info detail Just above the vlans it shows link UPS and link downs

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:

David Coglianese wrote:

If you're talking about a port. Sho port #:## info detail Just above the vlans it shows link UPS and link downs

great full, how i can following a flapping and fix it ? 
Userlevel 6
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.

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