SSH to serever as root and apply command
brctl show
You will see result similar to this
[root@server06 ~]# brctl show
bridge name bridge id STP enabled interfaces
xenbr0 8000.de9b24d7e813 no vifvm125.0
tap0
peth0
vif0.0
change the bridge according to result above
nano /usr/local/solusvm/data/advanced.conf
Add line to the advance.conf file
XENHVMBRIDGE="xenbro"