I was just wondering .
I recently stuck a cardbus NIC someone game me and it was configured as 
xi0 in addition to the other NIC i already had.

What i wanted to do was to switch the default interface from my othen 
NIC to the one i just inserted.
So the nic i wanted to switch from is ex0 and i wanted to switch to 
using xi0
 i already had ex0 configutred on the network , This is what i did
ifconfig ex0 down
route flush
ifconfig xi0 up
dhclient xi0

I thought this would do the trick but after doing netstat -r i had 
something like this
192.168.0.0  default     Iface ex0

After rebooting the xi0 was used correctly.
What did i miss ? How can i do it without rebooting ? man pages for 
route dont seem to say anything about intefaces