Yes its very strange but I have got two server having same H/W MAC address. The issue which I am facing is again very strange.
1st Server is normal windows server. 2nd Server is running KVM on Cenots. Have provisioned 4 Virtual Machine on this physical host.
Windows server is accessible without any issue. Centos Physical Box is not accessible over ssh from remote location or over LAN connection. However I am able to connect to all 4 vms from remote location or over LAN. Also I have configured OpenVPN on one VM which works flawlessly.
I am looking for a solution how to access the Physical host now over LAN or from remote location.I have statically assigned IP to those two servers and avoided DHCP allocation of IP.
Nagios server sends multiple host down alert for Linux box only.Is there any way to get a solution for this without replacing the NIC card which will take time for me.
Currently I have enabled MAC address Spoofing but that is again a temporary solution.
PS: I am still pondering how the openvpn and other three VMs were operating without any issue whereas physical NIC card was always not reachable from anywhere.