Xiao_Tommy,
We use GUPs here. Our SEPM is located at our datacenter, and we have GUPs setup in each of our three facilities.
What I did was create three groups (one for each facility) and three non-shared liveupdate policies. The setup has helped treamdously with bandwidth issues.
Make sure you when you define a GUP to choose a computer with a server OS, so that you have unlimited connections. Also, hopefully in a future MR release we will be able to get client updates through the GUPs. How cool would that be?
Mike