The network discovery process is a great feature in Altiris, but you can only input ranges to include or exclude one at a time. The console does not have an option to allow you to enter a list of ranges.
To get around this, right-click on the Network Discovery Policy and choose export. Save the XML file to your hard drive and open it with a text editor or an XML editor. Find the include IP or exclude IP range and just add additional ranges.
<include ip="220.127.116.11" endMask="18.104.22.168" type="range" />
<exclude ip="22.214.171.124" endMask="126.96.36.199" type="range" />
Just be sure to keep the same formatting and also to keep the includes and excludes in their appropriate sections.
After you add all your new inclusions or exclusions right-click on the folder that has your Network Discovery Policies and choose Import. Select the XML file you saved and edited and you now have all your entries.
This is a great time-saver when entering multiple entries...