Effectively , the cards are M5520-100TX
In event log, the warning just say link down and few minutes after link up.
9418 7 03-Jul-09 09:12:43 Alarm(60) Link Up Status = Okay : Port 4.19. [Port 4.19]
9417 7 03-Jul-09 09:12:41 Alarm(60) Link Down Status = No Link : Port 4.19. [Port 4.19]
and...
P550 send Alarm message in event log which show link down and up in few seconds(3 at max) for each port but port by port.
I do not know why this error messages appears.Apparently, PC connected to these ports loose some ping.
Please help me.
Thanks.
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