[ovirt-users] Networking fails for VM running on Centos6.7.Works on Centos6.5

hello all i am having strange network issue with vms that are running on centos 6.7 ovirt nodes. I recently added one more ovirt node which is running centos6.7 and upgraded from centos6.5 to centos6.7 on all other nodes. All VMs running on nodes with centos6.7 as host Operating system fail to reach network gateway,but if i reboot that same host to centos6.5 kernel everything works fine(with out changing any network configuration). Initially i thought it as configuration issue but its there on all nodes.if i reboot to old kernel everything is working. I am aware about ghost vlan0 issue in centos6.6 kernel.Not aware about any issue in centos6.7 Also all my servers are up to date. All physical interfaces are in access mode VLAN connected to nexus 5k switches. working kernel- 2.6.32-431.20.3.el6.x86_64 non working kernel- 2.6.32-573.8.1.el6.x86_64 Any idea?