reading through the changelogs for 2.6.15-git11 I found [BRIDGE]: allow setting hardware address of bridge pseudo-dev Some people are using bridging to hide multiple machines from an ISP that restricts by MAC address. So in that case allow the bridge mac address to be set to any of the existing interfaces. I don't want to allow any arbitrary value and confuse STP. How would an arbitrary value confuse STP? I think I know what STP(Spanning Tree Protocal) is. Isn't it what determins which switch to go to next if a mac isn't found on the local switch? In which case I might want to change the mac specifically for this purpose. I was more wanting to change the mac for the purpose of it having its own mac address so it gets a different ip from dhcp. Thats why I asked the question before. That and for testing purposes. Changing the mac to an arbitrary value would be extreamly usefull for testing purposes. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com