NAC OOB disconnection with IP Phone

Unanswered Question
May 6th, 2010


I have a question about NAC behavior, when i have a Ip phone connected, my workstation never goes down because
even if I turn off that workstation my swichport still on Link UP state.

Does anyone know how can I get around that issue?

thanks a lot

I have this problem too.
0 votes
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
Faisal Sehbai Thu, 05/06/2010 - 09:26


That is by design. The only instance when CAM will know that your PC is not on the network anymore (if it's behind an IP phone) is when a new MAC address is noted on the port. For this to work you have to use MAC-NOTIFICATION, and not the LINKUP-LINKDOWN traps on the CAM

In the upcoming 4.8 release you'll have an option of notifying the CAM when you logoff the machine, but that is not out yet.



danielnunes Thu, 05/06/2010 - 11:34

Hi Faisal,

I turned on                 Mac Notification on switch and I liked this option.

I saw that there is a option called port-security on Link-Notification mode and now I'd like to know what the best

mode that can I use, is there a option that is better than other?

thanks a lot

danielnunes Fri, 05/07/2010 - 06:56

Hi Faisal,

I tested the Mac Notification yesterday and work out fine but I saw that clients connected in this switch

are experiencing intermittent  lost connect after few moments.

thanks a lot


This Discussion