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Mike_Garczynski's avatar
Mike_Garczynski
Tin Contributor
Aug 31, 2026

Assign IP Address for Windows Server 2025 VM on Hyper-V

I have built my first Windows Server 2025 VM on HyperV and trying to assign an IP address.  I want the VM's to be like an actual server so I Created an external vswitch.   The HyperV server IP is 172...
Hyper-V
networking
windows server
Jamony's avatar
Jamony
MCT
Sep 02, 2026

You do not need a second virtual switch. One external Hyper-V switch can connect the host and VM to 172.16.1.0/24. Confirm the VM adapter is attached to that switch, the switch is bound to the correct physical NIC, and Allow management operating system to share this network adapter is enabled if the host uses that NIC. In the guest, verify 172.16.1.42, mask 255.255.255.0, gateway 172.16.1.5, and DNS, then confirm the address is unused. Test the guest address, host, and gateway in that order. Check the VM adapter’s VLAN setting; leave it untagged unless the physical switch requires a specific VLAN. Windows Firewall may block inbound ping, so also test outbound connectivity from the guest. If the gateway remains unreachable, inspect the physical switch for port security or MAC-address limits, because Hyper-V places the VM’s MAC behind the host port.

Mike_Garczynski's avatar
Mike_Garczynski
Tin Contributor
Sep 03, 2026

on the Hyper-V, if I issue ipconfig /all I get this output which indicated that the 172.16.1.41 IP is associated with Adapter #2    

Ethernet adapter vEthernet (Virtual Switch):

 

Connection-specific DNS Suffix . :

Description . . . . . . . . . . . : Hyper-V Virtual Ethernet Adapter

Physical Address. . . . . . . . . : D4-04-E6-0E-A2-87

DHCP Enabled. . . . . . . . . . . : Yes

Autoconfiguration Enabled . . . . : Yes

Link-local IPv6 Address . . . . . : fe80::a334:5bd:24d:d2b3%19(Preferred)

Autoconfiguration IPv4 Address. . : 169.254.142.53(Preferred)

Subnet Mask . . . . . . . . . . . : 255.255.0.0

Default Gateway . . . . . . . . . :

DHCPv6 IAID . . . . . . . . . . . : 416548070

DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-2D-D9-50-A2-D4-04-E6-0E-A2-87

NetBIOS over Tcpip. . . . . . . . : Enabled

 

Ethernet adapter Slot4 Port 1:

 

Connection-specific DNS Suffix . :

Description . . . . . . . . . . . : Broadcom 5719 1GbE RJ45 4-port OCP Ethernet Adapter #2

Physical Address. . . . . . . . . : D4-04-E6-0E-A2-86

DHCP Enabled. . . . . . . . . . . : No

Autoconfiguration Enabled . . . . : Yes

Link-local IPv6 Address . . . . . : fe80::b50d:7748:f233:237c%3(Preferred)

IPv4 Address. . . . . . . . . . . : 172.16.1.41(Preferred)

Subnet Mask . . . . . . . . . . . : 255.255.255.0

Default Gateway . . . . . . . . . : 172.16.1.5

DHCPv6 IAID . . . . . . . . . . . : 181667046

DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-2D-D9-50-A2-D4-04-E6-0E-A2-87

DNS Servers . . . . . . . . . . . : ::1

172.16.1.41

66.187.177.13

66.187.178.13

NetBIOS over Tcpip. . . . . . . . : Enabled