DHCP leases with no computer name?

[douglasemc]

hi, the address leases in my dhcp show a few ip's that have no description or name, just the ip address, i did a reverse lookup to find out the name of the computer but it just doesn't exists. i got the MAC address but not the host name
the only reazon why i'm worried is because that address is consuming 22% of my bandwidth, i killed it from dhcp but i'm afraid it will come up again

any thoughts?

The Internet? is that thing still around?!!

-Homer Simpson

 

[Davetoo]

Do you have something other than computers connected to your network?

I'm Certifiable, not cert-ified.
It just means my answers are from experience, not a book.

 

[douglasemc]

yes, printers and ip phones, but i checked all of their ip adresses and none of them has that ip nor would they take that much bandwidth
it has not come back since i deleted the lease yesterday tho

The Internet? is that thing still around?!!

-Homer Simpson

 

[longhair]

douglasemc,
from a command prompt:

ping -a 192.168.0.0

where 192.168.0.0 is the ip of the device you want the name of.
if the device is named it should be returned right before the ping information.
regards,
longhair

 

[itsp1965]

Unfortunately ping -a only seems to work in identifying Windows based devices and not *nix hosts, and other IP devices. I would try to identify the MAC address vendor by going to

http://standards.ieee.org/regauth/oui/oui.txt

from there you might be able to narrow down in what device this NIC might apply to.

 

[markdmac]

Also check for copiers that are network enabled. I've seen circumstances where a Fiery went bad and flooded the network like you are describing.

I hope you find this post helpful.

Regards,

Mark

Check out my scripting solutions at

http://www.thespidersparlor.com/vbscript

Work SMARTER not HARDER. The Spider's Parlor's Admin Script Pack is a collection of Administrative scripts designed to make IT Administration easier! Save time, get more work done, get the Admin Script Pack.