KVM guests lose connectivity after networking restart

Support
,
1

NethServer Version: 7.3.1611
Module: virtual machine

hi all, medium problem…
when i change any network configuration on host NS (add one bridge or change an ip) and network restart
i lose connectivity on all my virtual machine configurated with network card BR0 BR1 BR2

at same time, if i change any configuration in network panel from WebVirtMgr, same problem, lose connection with VM.

[root@samba ~]# brctl show
bridge name     bridge id               STP enabled     interfaces
br0             8000.1866daee40fc       no              em1
                                                        vb-nsdc
                                                        vnet0
                                                        vnet1
                                                        vnet2
                                                        vnet4
br1             8000.1866daee40fd       no              em2
                                                        vnet3
br2             8000.1866daee40fe       no              em3
docker0         8000.02424082f315       no
virbr0          8000.525400f4380d       yes             virbr0-nic

now only one machine ping GW, only one that I restarted

restart network on guest host dont solve the problem

Solution: Reboot all virtual machine
Alternativeto?

Thanks

2

I’ve seen this behaviour once. In my case vnet0 was down so I typed:
ifconfig vnet0 up
and “resolved” the issue.
If you can reproduce the problem we may try to find a fix.

1 Like
3

Fantastic solve the problem
I exec ifconfig vnet0/1/2/3/4 up
And they resume without restarting
Thank you so much