how to switch between different network configurations?

[Zhengquan Zhang mailing list <zhang.zhengquan.mailinglist@gmail.com>]

I have to switch the network configurations between the lab, the dorm and the
home ones. Normally I manullay edit /etc/network/interfaces and restart the
networking.

Is there any easier and smarter way of doing this?

Thank you!

Regards:
Zhang