IP restrictions do not take effect until you use the ipxml2bin utility to convert the XML to binary and transfer it to either the IP GDO (on database nodes) or the bin file . See Enabling XML-Based IP Restrictions with the ipxml2bin Utility.
The initial setup of IP restrictions requires a system tpareset, but if you rerun the ipxml2bin utility the tpareset is not required. See Editing or Disabling IP Restrictions.