networking script in Debian

[Wing]

I have a simple question. In the boot up of the debian system, how and when the /etc/init.d/networking script in debian get called? I expect to find a S10networking in rc2.d directory but there wasn't. Would you mind clue me in? Also, I want to install a static routes when boot up. Is there a standard place in debian for me to edit? e.g. in redhat I go to /etc/sysconfig/static-route. Thanks in advance!