Squeeze Soft Lockup on ESXi 5.1

Hi, Every 1 to 2 weeks i have that problem with some virtual machines - everythings runs on squeeze and ESXi 5.1 Hosts (Dell PowerEdge R510 Machines) This happens mostly at about 6:30am. Sadly iam a newbie dechiffre Kernel traces, so i attached todays here. uname -a: Linux workaholic7 2.6.32

squeeze how to hot-reload new interfaces file

I think i may be discussed earlier but i didnt find it yet. as all may know /etc/init.d/networking restart (or invoke-rc.d networking restart) didnt work anymore. while trying to handle it with ifdown -a && ifup -a it doesnt work either. we have a post-boot config like this auto lo aut