Why am I receiving duplicate MAC addresses using a bridged adapter in VMWare Workstation
Posted on 2016-08-02
I have VMWare Workstation 12 setup on my laptop with a windows 2008 R2 VM which is using a bridged network adapter. The host(laptop) has a different IP than the VM. Both IP's are in the same subnet.
At one point it was all working fine. I would connect via RDP to the host and RDP to the VM accordingly. However, now all of a sudden when I try to connect to the VM, I instead connect to the host.
Further looking at the VM, I am receiving an IP conflict message. When I look at the arp table on the switch i see that both IP's from the host and VM show the same MAC addr
sw-corp-core01#show arp | i c7f8
Internet 10.30.10.40 12 206a.8afd.c7f8 ARPA Vlan10 <== IP of VM
Internet 10.30.10.62 0 206a.8afd.c7f8 ARPA Vlan10 <== IP of Host
This is weird because the VM has the virtual MAC and the host, well it has its own physical mac. Yet on the switch both show the same MAC even though I have 2 different DNS entries on my domain controller.
Anyways, does this behavior sound right? I thought that the MAC address of the VM is suppose to be the actual virtual MAC even though I am bridging with the physical NIC of the host. Again, at one point I was connecting to each server individually/simultaneously.
Many thanks in advance.