Listing 3. /etc/heartbeat/ha.cf

debugfile /var/log/ha-debug
logfile /var/log/ha-log
logfacility     local0
keepalive 2
deadtime 120
initdead 120
serial  /dev/ttyS1
baud 9600
udpport 694
udp     eth0
nice_failback on
node server1
node server2