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Flapping ports

chris-darling
Level 1
Level 1

‎05-22-2003 05:10 AM - edited ‎03-02-2019 07:33 AM

Hi,

I have recently seen "flapping ports" on our edge switch (3500xl, 2950xl etc) and it seems to be mainly laptops running Microsoft WIndows 2000 or higher.

Has anyone else seen this (I thought it might be to do with wireless adapters but some laptops do not have them)

thanks

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milan.kulik
Level 10
Level 10

‎05-22-2003 06:24 AM

Hi,

"Windows 2000 and Windows ME employ a power management capability that can disable the NIC. When the NIC is disabled for power management, the NIC will drop link to the switch. If there is a concern of link going up/down on NICs using operating systems Windows 2000 or Windows ME, disable the power management feature as a first means of troubleshooting link up/down situations."

See http://www.cisco.com/warp/public/473/46.pdf for details.

Regards,

Milan

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