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The Graveyard - Products No Longer Supported => Routers / COVR => DIR-655 => Topic started by: extremegladiatorbrah on February 10, 2009, 11:45:26 AM

Title: MAC Address all 0's
Post by: extremegladiatorbrah on February 10, 2009, 11:45:26 AM

We don't understand why our router's list of MAC addresses keeps filling up with 0'd out MAC addresses. Please advise.
The 0 mac addresses take up IP addresses from other computers, and if we revoke them, they come back.





XOXO
Extremegladiatorbrah

Title: Re: MAC Address all 0's
Post by: arod on February 10, 2009, 02:30:49 PM

Under what screen are you seeing this? Can you post a screenshot of what you're seeing?

Title: Re: MAC Address all 0's
Post by: smlunatick on February 11, 2009, 12:18:52 PM

On the Internet "manual" setting web page, the MAC address "dialog" box is used to "clone" an existing MAC address.  There were/are on Internet services that require a registered MAC address to be seen before the service will assign an IP address to the router's WAN port.

Title: Re: MAC Address all 0's
Post by: extremegladiatorbrah on February 12, 2009, 08:33:42 AM

(http://img131.imageshack.us/img131/6230/macaddresstk4.png)

sorry for the late response, and thanks for looking at it

>login>Setup>Network Settings

Title: Re: MAC Address all 0's
Post by: arod on February 12, 2009, 08:40:08 AM

Can you ping those IP addresses? (both that has zero mac's)

Title: Re: MAC Address all 0's
Post by: extremegladiatorbrah on February 12, 2009, 08:42:46 AM

in the Run window, I typed Ping 192.168.1.76

successful 8/9 times i tried. the 5th request (it does 3 at a time) timed out

Title: Re: MAC Address all 0's
Post by: arod on February 12, 2009, 08:47:09 AM

Try revoking it, clear the cache from your browser and try to ping it again.

Title: Re: MAC Address all 0's
Post by: extremegladiatorbrah on February 12, 2009, 08:54:08 AM

We've already tried that :<

Title: Re: MAC Address all 0's
Post by: Reinvented on February 12, 2009, 09:00:12 AM

Those are a lot of devices.  How many of them are wireless?

I know I've had that problem before, when some of my wireless devices have trouble connecting and end up in some loop.  And what kind of security do you use?  WPA or WPA2?

And...what do your logs show?  If you copy and paste it, do a search for those IP addresses.  I have a feeling it has to do with wireless clients deauthenticating, and not being able to reconnect properly. 

Title: Re: MAC Address all 0's
Post by: Lycan on February 12, 2009, 09:07:08 AM

Run the Mac filter on Deny and and ban 00 addresses.
Also shorten your DHCP scope to only include the devices in your network, then give DHCP reservations for ALL those addresses. PAIN IN THE BUTT setup, but once it's done things like this are no longer an issue.

Title: Re: MAC Address all 0's
Post by: extremegladiatorbrah on February 12, 2009, 09:13:44 AM

We're at a school, so I don't think the DHCP reservations would work with all of the student's computers. 

And the mac filter does not allow us to deny and ban 00 addresses.

Title: Re: MAC Address all 0's
Post by: Lycan on February 12, 2009, 09:23:02 AM

if your at a school you're using the WRONG hardware. thats a home class router, not intended for networks of more then 10-15 computers.

Title: Re: MAC Address all 0's
Post by: extremegladiatorbrah on February 12, 2009, 09:37:51 AM

That's what I keep telling people!  I have a router picked out in the $500 range.  Do you think that is on the right track?

Title: Re: MAC Address all 0's
Post by: extremegladiatorbrah on February 12, 2009, 09:41:49 AM

We would rather use a D Link equivalent - but this came up as more specifically relating to small offices etc.

Title: Re: MAC Address all 0's
Post by: davevt31 on February 12, 2009, 09:44:12 AM

I think they will suggest one of these:

http://www.dlink.com/products/category.asp?cid=2&sec=2

Title: Re: MAC Address all 0's
Post by: Lycan on February 12, 2009, 12:24:16 PM

no DFL-210