Why not? It works fine, all our hosts have ovirtmgmt without a vlan and all other networks with a vlan. At least with RHEL, there is nothing wrong with the following:

[root@virt02a network-scripts]# more ifcfg-cogent 
TYPE=Bridge
DEVICE=cogent
VLAN=yes
BOOTPROTO=none
MTU=1500
[root@virt02a network-scripts]# more ifcfg-ovirtmgmt 
TYPE=Bridge
DEVICE=ovirtmgmt
BOOTPROTO=none
IPADDR=10.71.1.15
NETMASK=255.255.255.0
GATEWAY=10.71.1.1
ONBOOT=yes
DEFROUTE=no
MTU=1500
[root@virt02a network-scripts]# more ifcfg-private 
TYPE=Bridge
DEVICE=private
BOOTPROTO=none
IPADDR=10.71.0.15
NETMASK=255.255.255.0
GATEWAY=10.71.0.1
ONBOOT=yes
DEFROUTE=yes
MTU=9000
[root@virt02a network-scripts]# more ifcfg-cogent 
TYPE=Bridge
DEVICE=cogent
VLAN=yes
BOOTPROTO=none
MTU=1500
[root@virt02a network-scripts]# more ifcfg-comcast 
TYPE=Bridge
DEVICE=comcast
VLAN=yes
BOOTPROTO=none
MTU=1500
[root@virt02a network-scripts]# more ifcfg-eth2.100 
DEVICE="eth2.100"
VLAN=yes
ONBOOT="yes"
TYPE="Ethernet"
BRIDGE=private
MTU=9000
[root@virt02a network-scripts]# more ifcfg-eth2.201
DEVICE="eth2.201"
VLAN=yes
ONBOOT="yes"
TYPE="Ethernet"
BRIDGE=cogent
[root@virt02a network-scripts]# more ifcfg-eth2.202
DEVICE="eth2.202"
VLAN=yes
ONBOOT="yes"
TYPE="Ethernet"
BRIDGE=comcast
[root@virt02a network-scripts]# more ifcfg-eth2
DEVICE="eth2"
ONBOOT="yes"
TYPE="Ethernet"
BRIDGE=ovirtmgmt
MTU=9000


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nathan stratton | vp technology | broadsoft, inc | +1-240-404-6580 | www.broadsoft.com