What exactly is going on when the boot process says it's setting the mac address for VLAN 1?  My router is freezing just after this is printed and is completely inaccessible.  I have tried several different images (RC5 normal and micro, RC4, and some custom built ones) all of which do the same thing (Linksys image does not).  I understand what a mac address is, and I think I understand what vlan's are.  But why does a vlan need a mac address?  Is a vlan more like a single interface composed of multiple ports?  What in the setting process could cause the router to freeze?

Thanks!
--Jason