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Hyper-V virtual machines can not connect to internet if have both internal and external adapters enabled at same time

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Hello everybody,

I'm facing a very strange error and don't know where to start with it.

My host have

 1/ 1st Adapter connect direct to router with default IP: 192.168.1.251 (this one for host only, remote, update, etc...)

 2/ 2nd Adapter connect direct to router with default IP: 192.168.1.252 (this one is for VMs by creating virtual switch with it)

 3/ 3rd + 4th Adapter is for SAN and connect directly to cisco switch (this does not touch VMs's part)

 4/ 5th Adapter is for Domain controller (hosts-hosts , host-clients) with default IP: 10.0.10.100

Ok, i started creating external network for VMs and it's working great as expected with 2nd Adapter (192.168.1.252) , VMs have direct connection to router with external IP (192.168.1.44) and i can ping telnet everywhere.

Next, i create an another external network with 5th Adapter (10.0.10.100) , well it's working! I can join my domain controller.

But the problem is here ... if the domain controller adapter (10.0.10.100) is exist, my VMs can not ping or telnet out side the box. I tried to remove 5th Adapter and create another Internal switch in Hyper-v manager but it's not working also. It's look like i did something wrong, please take a look!

Thanks,

Warmest regards...


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