diff --git a/.gitattributes b/.gitattributes
index 9b1a2c2b47a3a993ad6b58e6af3514cc6baecc7f..b774469a1dce3452a39f29cdab85ae9043cd718a 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -4640,6 +4640,7 @@ RTCP/Cobalt/GPUProc/test/t_generate_globalfs_locations.in_parset -text
 RTCP/Cobalt/GPUProc/test/t_generate_globalfs_locations.sh eol=lf
 RTCP/Cobalt/InputProc/doc/Cobalt-New-InputSection.jpg -text svneol=unset#image/jpeg
 RTCP/Cobalt/InputProc/src/Delays/printDelays.log_prop -text
+RTCP/Cobalt/InputProc/src/ping_intl.sh -text
 RTCP/Cobalt/InputProc/test/tMPI.run eol=lf
 RTCP/Cobalt/InputProc/test/tMPI.sh eol=lf
 RTCP/Cobalt/InputProc/test/tMPIUtil2.run eol=lf
@@ -5543,6 +5544,7 @@ SubSystems/Online_Cobalt/install/install_casacore.sh eol=lf
 SubSystems/Online_Cobalt/install/install_qpid.sh eol=lf
 SubSystems/Online_Cobalt/install/lofarsys/bash_profile -text
 SubSystems/Online_Cobalt/install/lofarsys/bashrc -text
+SubSystems/Online_Cobalt/install/lofarsys/crontab -text
 SubSystems/Online_Cobalt/install/postinstall.sh eol=lf
 SubSystems/Online_Cobalt/install/postinstall_lofarbuild.sh eol=lf
 SubSystems/Online_Cobalt/install/postinstall_lofarsys.sh eol=lf
diff --git a/RTCP/Cobalt/InputProc/src/CMakeLists.txt b/RTCP/Cobalt/InputProc/src/CMakeLists.txt
index bcbe83a534ec8509b3e71ef12f59a920224d7dc7..ff6c208a3ad0e02414dbff6d22f46c4d7f44b093 100644
--- a/RTCP/Cobalt/InputProc/src/CMakeLists.txt
+++ b/RTCP/Cobalt/InputProc/src/CMakeLists.txt
@@ -49,3 +49,4 @@ configure_file(
   ${CMAKE_BINARY_DIR}/bin/mpirun.sh @ONLY)
 
 lofar_add_bin_scripts(${CMAKE_BINARY_DIR}/bin/mpirun.sh)
+lofar_add_bin_scripts(ping_intl.sh)
diff --git a/RTCP/Cobalt/InputProc/src/ping_intl.sh b/RTCP/Cobalt/InputProc/src/ping_intl.sh
new file mode 100755
index 0000000000000000000000000000000000000000..7634f03c8b459308826e48464c8f14af2090612e
--- /dev/null
+++ b/RTCP/Cobalt/InputProc/src/ping_intl.sh
@@ -0,0 +1,32 @@
+#!/bin/bash -u
+echo "Begin `date`"
+echo "Host  `hostname`"
+
+HOSTNAME=`hostname`
+RSPCONNECTIONS=$LOFARROOT/etc/StaticMetaData/RSPConnections_Cobalt.dat
+
+# International stations have the name xx6xx.
+#
+# For each International Station VLAN, Cobalt has IP 10.x.x.50,
+# and we need to ping 10.x.x.1.
+SRCIPS=`
+  <$RSPCONNECTIONS fgrep $HOSTNAME |
+  grep -v "^#" |
+  perl -ne '
+    if (/^..60?(..?) .* 10[.]([0-9]+)[.]([0-9]+)[.]1../) {
+      if ($3 == 1) {
+        print "10.$2.$1.1\n"
+      } else {
+        print "10.$2.$3.1\n"
+      }
+    } '
+
+echo "IPs   $SRCIPS"
+
+for IP in $SRCIPS
+do
+  # Ping this RSP board, but don't wait for an answer
+  ping -p 10fa -q -n -c 1 -w 1 $IP
+done
+
+echo "End   `date`"
diff --git a/SubSystems/Online_Cobalt/install/lofarsys/crontab b/SubSystems/Online_Cobalt/install/lofarsys/crontab
new file mode 100644
index 0000000000000000000000000000000000000000..6bfa90d6e7043152f7e43ccfe00f5d41f25c8b48
--- /dev/null
+++ b/SubSystems/Online_Cobalt/install/lofarsys/crontab
@@ -0,0 +1,3 @@
+# m h  dom mon dow   command
+* * * * * source /opt/lofar/lofarinit.sh && ping_intl.sh >> $HOME/ping_intl.`hostname`.log 2>&1
+
diff --git a/SubSystems/Online_Cobalt/install/postinstall_lofarsys.sh b/SubSystems/Online_Cobalt/install/postinstall_lofarsys.sh
index c91db6aeb7218f98467d5d8ed134390207c783ee..21f9e857155fdcb23f62fee6148410cfaddd5681 100755
--- a/SubSystems/Online_Cobalt/install/postinstall_lofarsys.sh
+++ b/SubSystems/Online_Cobalt/install/postinstall_lofarsys.sh
@@ -31,3 +31,9 @@ ssh localhost true
 # ********************************************
 echo "Configuring /opt/lofar/var..."
 mkdir -p ~lofarsys/lofar/var/{log,run}
+
+# ********************************************
+#  Schedule periodic tasks
+# ********************************************
+echo "Configuring crontab..."
+crontab lofarsys/crontab