spontaneous restart of virtual machines on cluster

[asdrojd]

2 edintical servers dl380g10
cluster 2 nodes
first node don't have any vm
on first server from 4 network created one bond (balance-rr) that connected to vmbr0

second node has 8 vms and only one network connected that also connected to vmbr0.
server hardware user 30-50%, not problem in hardware.

if i unplug lan cable from forth lan port from first server(I remind you there are no virtual machines)
on second server all vm's start restarting, the question why?
it tested several times and situation is the same.

first server network config
auto lo
iface lo inet loopback
auto eno4
iface eno4 inet manual
auto eno1
iface eno1 inet manual
auto eno2
iface eno2 inet manual
auto eno3
iface eno3 inet manual

auto bond0
iface bond0 inet manual
<------>bond-slaves eno1 eno2 eno3
<------>bond-miimon 100
<------>bond-mode balance-rr
auto vmbr0
iface vmbr0 inet static
<------>address 192.168.150.30/24
<------>gateway 192.168.150.1
<------>bridge-ports eno4
<------>bridge-stp off
<------>bridge-fd 0


second server net config
auto lo
iface lo inet loopback
iface eno1 inet manual
auto vmbr0
iface vmbr0 inet static
<------>address 192.168.150.40/24
<------>gateway 192.168.150.1
<------>bridge_ports eno1
<------>bridge_stp off
<------>bridge_fd 0
iface eno2 inet manual
iface eno3 inet manual
iface eno4 inet manual