unknow device

Unanswered Question
Feb 15th, 2008
User Badges:


can someone help me with this problem?:

I have a cisco network with 20 branches and a central site. In my network is a device with address 169.254.X.X, what is a address for computers that haven't assigned DHCP address. I need physically find this computer and renonfigure it, but where is it???....how can i find it?

Any idea?


  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
royalblues Fri, 02/15/2008 - 04:21
User Badges:
  • Green, 3000 points or more

169.254.x.x is an adress that a windows machine configured with DHCP assigns by default when it is unable to contact the DHCP server.

I dont think there is any way to identify it.


glen.grant Fri, 02/15/2008 - 04:52
User Badges:
  • Purple, 4500 points or more

How do you know it has this address , where are you seeing this ??

lubosbella Mon, 02/18/2008 - 01:56
User Badges:


I see it on my logs from PIX. Here is the record:

%PIX-4-106023: Deny udp src outside: dst inside:172.20.X.X/137 by access-group "FromOutside"


I think there is one solution .... to find MAC address....then the switch...then port


This Discussion