System Administration Guide: IP Services

Turning On Space-Saving Mode

Space-saving mode provides the host with a table that contains only the default routes. On a host, in.routed runs with space-saving mode turned off by default.

If the host is not to have a full routing table (which provides increased protection against misconfigured routers), turn space-saving mode on.

How to Turn On Space-Saving Mode

  1. Become superuser on the host.

  2. Edit the /etc/rc2.d/S69inet startup script by adding to the line /usr/sbin/in.routed -q the -s option:

    /usr/sbin/in.routed -q -s


    /usr/sbin/in.routed -q -S