Why am I receiving duplicate MAC addresses using a bridged adapter in VMWare Workstation
hello,
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/simultaneousl
Many thanks in advance.
t
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/simultaneousl
Many thanks in advance.
t
ASKER
Yes. I forgot to mentioned this. When i use the IP of the VM, I connect to the host.
ASKER CERTIFIED SOLUTION
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so both IP Addresses connect to the Host ?
what is the MAC Address of the VM, and can you ping that ?
what is the MAC Address of the VM, and can you ping that ?
ASKER
I just perform the netsh reset and i am assigning the IP's again to then test.
Andrew, that is correct. I can ping the IP of the VM but it is recognized as the IP of the host for some reason. The MAC of the VM ends with 64:7A
But when I ping the IP of the VM and issue a 'arp -a' command I see the MAC of the host instead of the VM. this is the case from both the switch and my workstation/pc.
but right now I am re-ip'ing after the netsh reset..standby..
Andrew, that is correct. I can ping the IP of the VM but it is recognized as the IP of the host for some reason. The MAC of the VM ends with 64:7A
But when I ping the IP of the VM and issue a 'arp -a' command I see the MAC of the host instead of the VM. this is the case from both the switch and my workstation/pc.
but right now I am re-ip'ing after the netsh reset..standby..
ASKER
seems like the IP and MAC assignment is correct. arp -a for both IP's return the appropriate MAC.
testing RDP connections..
testing RDP connections..
ASKER
at first the RDP connections did not work. i had to go into the Remote session host config and recreate the connections.
Thanks guys!
Thanks guys!
You are very welcome and I was happy to help.
even if you use both IP Addresses ?