To upgrade from OpenSIPS or OpenSER to Kamailio on a single machine

1. Do:
   • cpan Math::BigInt::FastCalc
   • enswitch install kamailio
   • vi /etc/kamailio/kamailio.cfg # and set the database URL
   • service openser stop
   • service opensips stop
   • enswitch kamailio_tables
   • service kamailio restart
2. If running Debian or Ubuntu, do:
   • rm -f /etc/init.d/opensips /etc/init.d/openser
   • update-rc.d openser remove
   • update-rc.d opensips remove
3. If running CentOS, Fedora, or Redhat, do:
   • chkconfig openser off
   • chkconfig opensips off
   • rm -f /etc/init.d/opensips /etc/init.d/openser

To upgrade from OpenSIPS or OpenSER to Kamailio on a pair of machines running heartbeat

Do each command on both machines before continuing to the next command.

1. Do, on both machines simultaneously:
   • cpan Math::BigInt::FastCalc
   • enswitch install kamailio-ha
   • vi /etc/kamailio/kamailio.cfg # and set the database URL
   • service heartbeat stop
   • vi /etc/ha.d/haresources # and change "opensips" or "openser" to "kamailio"
   • enswitch kamailio_tables # only needs done on one machine
   • service heartbeat start
   • rm /etc/ha.d/resource.d/opensips /etc/ha.d/resource.d/openser
2. Test a failover and fail back.

Should you need to revert to OpenSIPS, the table_version for location is 1004.