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[Matt Kendall]

Upgrading the firmware is, of course, the correct and recommended approach, but if you're like me and needed to get this resolved quickly without going through a firmware upgrade, the following steps worked around the issue on my DIR-615. Because the validation of the MAC address is occurring in your web browser, you have control over it.

1) Navigate to the Network Settings page
2) Copy and paste the following into your address bar:

javascript:(function(){ window['check_mac'] = function() { return true; } })();

3) Press enter in the address bar, this evaluates the Javascript bookmarklet in step #2
4) Enter in the reservation information and click Save.

What this will do is rewrite the function called check_mac, which always fails for MAC addresses not starting with "00," to always return true. The validation will therefore pass and you can save your changes. This change is not permanent and will not harm or alter your router. In fact you will have to re-execute the bookmarklet each time you reload the network settings page.

Hope that helps

[vuelo_libre]

I, too, ran into the same problem and, YES, it should have been addressed a long time ago, particularly when the code made public points to the problem and many enthusiast understand the nature of the problem.

My work-around was to re-configure the LAN MAC address to start with 00.

First:
Start -> Type in the search field: CMD... press <ENTER>.
At the command window, type: IPCONFIG /ALL then press <ENTER>
Find your MAC address and copy it down.
Close the command window.

Second:
Start -> Control Panel -> Device Manager -> Network Adapters, highlight the adapter causing the problem and right click -> Advanced Tab -> Click on "Mac Address" -> Fill in the NEW address starting with 00 then back fill the rest of the MAC address you copied but NOT THE FIRST TWO NUMBERS. "00" is substituted for what ever the two first original numbers were.


Example:     Original MAC: 02:12:ab:23:cd:56:ef:78

                    NEW MAC: 00:12:ab:23:cd:56:ef:78


Click OKAY to accept the new MAC address. Now the router can handle the MAC address because it doesn't start with "00".

Good luck.

[meandmydog05]

I know this is an old thread, but I wanted to thank Denton and Matt for good work arounds. Especially Matt's which was very clever. And I wanted to let everyone know that I have a Dlink DIR-615 with the same problem!!!! But thanks to Matt, I got through it.

Get with it D-Link. My last Dlink router would spontaneously change admin password to an unknown value every few months, so I would have to do a complete reset to factory defaults to administer the thing. You guys are really pissing me off ! (dlink)