diff --git a/debian/cloudstack-agent.postinst b/debian/cloudstack-agent.postinst
index 499ae6a695a..9bad1380bf0 100644
--- a/debian/cloudstack-agent.postinst
+++ b/debian/cloudstack-agent.postinst
@@ -34,7 +34,15 @@ case "$1" in
                 fi
             done
         fi
+
+        # Running cloudstack-agent-upgrade to update bridge name for upgrade from CloudStack 4.0.x (and before) to CloudStack 4.1 (and later)
+        /usr/bin/cloudstack-agent-upgrade
+        if [ ! -d "/etc/libvirt/hooks" ] ; then
+            mkdir /etc/libvirt/hooks
+        fi
+        cp -a /usr/share/cloudstack-agent/lib/libvirtqemuhook /etc/libvirt/hooks/qemu
+        /etc/init.d/libvirt-bin restart
         ;;
 esac
 
-exit 0
\ No newline at end of file
+exit 0
diff --git a/debian/rules b/debian/rules
index 5e3d58c4da3..26a3495d1c0 100755
--- a/debian/rules
+++ b/debian/rules
@@ -71,6 +71,8 @@ install:
 	install -D packaging/debian/init/cloud-agent $(DESTDIR)/$(SYSCONFDIR)/init.d/$(PACKAGE)-agent
 	install -D agent/target/transformed/cloud-setup-agent $(DESTDIR)/usr/bin/cloudstack-setup-agent
 	install -D agent/target/transformed/cloud-ssh $(DESTDIR)/usr/bin/cloudstack-ssh
+	install -D agent/target/transformed/cloudstack-agent-upgrade $(DESTDIR)/usr/bin/cloudstack-setup-agent
+	install -D agent/target/transformed/libvirtqemuhook $(DESTDIR)/usr/share/$(PACKAGE)-agent/lib/
 	install -D agent/target/transformed/* $(DESTDIR)/$(SYSCONFDIR)/$(PACKAGE)/agent
 
 	# cloudstack-management
diff --git a/packaging/centos63/cloud.spec b/packaging/centos63/cloud.spec
index 5f8a2a50d16..1e88ea7a37a 100644
--- a/packaging/centos63/cloud.spec
+++ b/packaging/centos63/cloud.spec
@@ -476,6 +476,13 @@ fi
 
 %post agent
 if [ "$1" == "1" ] ; then
+    echo "Running %{_bindir}/%{name}-agent-upgrade to update bridge name for upgrade from CloudStack 4.0.x (and before) to CloudStack 4.1 (and later)"
+    %{_bindir}/%{name}-agent-upgrade
+    if [ ! -d %{_sysconfdir}/libvirt/hooks ] ; then
+        mkdir %{_sysconfdir}/libvirt/hooks
+    fi
+    cp -a ${RPM_BUILD_ROOT}%{_datadir}/%{name}-agent/lib/libvirtqemuhook %{_sysconfdir}/libvirt/hooks/qemu
+    /sbin/service libvirtd restart
     /sbin/chkconfig --add cloudstack-agent > /dev/null 2>&1 || true
     /sbin/chkconfig --level 345 cloudstack-agent on > /dev/null 2>&1 || true
 fi