Безвестно падает Debian с pve на борту?

 cat ./network-reboot.sh
#!/bin/sh -

ScriptName=`basename $0`
PID=$$
PIDFile="/var/run/${ScriptName}.pid"

if [ -f $PIDFile ]; then
    exit 0;
fi;

if [ "$1" != "start" ]; then
    echo "`date` started" >> /var/log/${ScriptName}.log
    $0 start &>/dev/null &2>/dev/null
    exit 0;
fi;

trap "rm -f $PIDFile" 0 1 2 5 15
echo $PID > $PIDFile

sleep 30;

while true
do
    sleep 90;
    Req=`/usr/bin/curl -f --head --silent http://ya.ru/ | grep '200 Ok'`
    if [ "$Req" = "" ]; then
        echo "`date` reboot by timeout" >> /var/log/${ScriptName}.log
        /sbin/ifconfig eth0 down
        sleep 2
        /sbin/ifconfig eth0 up
        sleep 3
        Req=`/usr/bin/curl -f --head --silent http://ya.ru/ | grep '200 Ok'`
        echo "`date` eth0 up - [${Req}]" >> /var/log/${ScriptName}.log
        sleep 30
        /sbin/reboot
    fi
done;

Hardware data:

   CPU1 Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz (Cores 8)
   RAM  15758 MB
   Disk /dev/sda: 3000.6 GB  (=> 2861 GIB)
   Disk /dev/sdb: 3000.6 GB  (=> 2861 GIB)

Network data:
   eth0  LINK: yes
         MAC:  50:46:5d:xx:xx:xx
         IP:   144.76x.xxx.xxx
         IPv6: 2a01:xxxx:xxxx:xxxx::x/64
         RealTek RTL-8169 Gigabit Ethernet driver

root@rescue ~ # lspci
00:00.0 Host bridge: Intel Corporation Device 0150 (rev 09)
00:01.0 PCI bridge: Intel Corporation Device 0151 (rev 09)
00:02.0 VGA compatible controller: Intel Corporation Device 0162 (rev 09)
00:14.0 USB Controller: Intel Corporation Device 1e31 (rev 04)
00:16.0 Communication controller: Intel Corporation Device 1e3a (rev 04)
00:1a.0 USB Controller: Intel Corporation Device 1e2d (rev 04)
00:1c.0 PCI bridge: Intel Corporation Device 1e10 (rev c4)
00:1c.4 PCI bridge: Intel Corporation Device 1e18 (rev c4)
00:1d.0 USB Controller: Intel Corporation Device 1e26 (rev 04)
00:1f.0 ISA bridge: Intel Corporation Device 1e4a (rev 04)
00:1f.2 SATA controller: Intel Corporation Device 1e02 (rev 04)
00:1f.3 SMBus: Intel Corporation Device 1e22 (rev 04)
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 09)
r