hello, i have changed the name of the default virtual network of the device
virbr0, so when i restart the pc or boot up the pc after a state of off, when i
open virt-manager, and try to start the VM, appear the next error:

Error starting domain: Requested operation is not valid: network 'virtlan0'
(new name) is not active.

Details:

Error starting domain: Requested operation is not valid: network 'virtlan0' is
not active

Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/asyncjob.py", line 75, in
cb_wrapper
    callback(asyncjob, *args, **kwargs)
  File "/usr/share/virt-manager/virtManager/asyncjob.py", line 111, in tmpcb
    callback(*args, **kwargs)
  File "/usr/share/virt-manager/virtManager/libvirtobject.py", line 66, in
newfn
    ret = fn(self, *args, **kwargs)
  File "/usr/share/virt-manager/virtManager/domain.py", line 1422, in startup
    self._backend.create()
  File "/usr/lib64/python3.6/site-packages/libvirt.py", line 1089, in create
    if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self)
libvirt.libvirtError: Requested operation is not valid: network 'virtlan0' is
not active

systemctl status -l libvirtd
��� libvirtd.service - Virtualization daemon
Loaded: loaded (/usr/lib/systemd/system/libvirtd.service; enabled; vendor
preset: disabled)
Active: active (running) since Wed 2019-06-26 20:54:22 AST; 7min ago
Docs: man:libvirtd(8)
https://libvirt.org
Main PID: 1810 (libvirtd)
Tasks: 17 (limit: 32768)
CGroup: /system.slice/libvirtd.service
������1810 /usr/sbin/libvirtd --listen
Jun 26 20:54:20 DevWEDC libvirtd[1810]: 2019-06-27 00:54:20.448+0000: 1810:
info : libvirt version: 5.1.0
Jun 26 20:54:20 DevWEDC libvirtd[1810]: 2019-06-27 00:54:20.448+0000: 1810:
info : hostname: DevWEDC
Jun 26 20:54:20 DevWEDC libvirtd[1810]: 2019-06-27 00:54:20.448+0000: 1810:
warning : virGetHostnameImpl:713 : getaddrinfo failed for 'DevWEDC': Name or
service not known
Jun 26 20:54:21 DevWEDC libvirtd[1810]: libvirt version: 5.1.0
Jun 26 20:54:21 DevWEDC libvirtd[1810]: hostname: DevWEDC
Jun 26 20:54:21 DevWEDC libvirtd[1810]: Failed to intialize libnetcontrol. 
Management of interface devices is disabled
Jun 26 20:54:22 DevWEDC systemd[1]: Started Virtualization daemon.
Jun 26 20:54:27 DevWEDC dnsmasq[2172]: directory /etc/resolv.conf for
resolv-file is missing, cannot poll
Jun 26 20:54:27 DevWEDC libvirtd[1810]: internal error: Child process
(VIR_BRIDGE_NAME=virbr0 /usr/sbin/dnsmasq
--conf-file=/var/lib/libvirt/dnsmasq/virtlan0.conf --leasefile-ro
--dhcp-script=/usr/lib64/libvirt/lib>
dnsmasq: directory /etc/resolv.conf for resolv-file is missing, cannot poll
Jun 26 20:55:00 DevWEDC libvirtd[1810]: this function is not supported by the
connection driver: virConnectNumOfInterfaces

Now if i manually start will work, but i need to auto start function.