Forum Discussion
Windows Server 2019 Preview Build 17623 Hyper-V Issue
Hello Matt,
the strange thing is that the nic has the address that usually a network takes when there is an unidentified network, 169.253.12.63.
The Get-NetAdapter gives this:
Name InterfaceDescription ifIndex Status MacAddress LinkSpeed
---- -------------------- ------- ------ ---------- ---------
vEthernet (External) Hyper-V Virtual Ethernet Adapter 16 Up 00-25-B3-E3-69-E8 10 Gbps
Ethernet QLogic BCM5709C Gigabit Ethernet ...#49 8 Disconnected 00-25-B3-E3-69-E8 0 bps
Ethernet 3 QLogic BCM5709C Gigabit Ethernet ...#50 6 Disconnected 00-25-B3-E3-69-EA 0 bps
Ethernet 4 QLogic BCM5709C Gigabit Ethernet ...#48 5 Up 00-25-B3-E3-69-E6 1 Gbps
vEthernet (InternalVne... Hyper-V Virtual Ethernet Adapter #2 28 Up 00-15-5D-00-28-01 10 Gbps
Ethernet 2 QLogic BCM5709C Gigabit Ethernet ...#51 4 Up 00-25-B3-E3-69-EC 1 Gbps
and if I apply the command to see the ip this is the result:
InterfaceAlias : vEthernet (External)
InterfaceIndex : 16
InterfaceDescription : Hyper-V Virtual Ethernet Adapter
NetProfile.Name : Unidentified network
IPv4Address : 169.254.12.63
IPv6DefaultGateway :
IPv4DefaultGateway :
DNSServer : fec0:0:0:ffff::1
fec0:0:0:ffff::2
fec0:0:0:ffff::3
I also seen this with Get-VMNetworkAdapter -All (but I never used previously this command so I don't know if it is so that the ip address doesn't appear for External switch):
InternalVnet40 True InternalVnet40 00155D002801 {Ok}
External True External 0025B3E369E8 {Ok}
Scheda di rete False vm-w10-mgt External 00155D002805 {Ok} {169.254.202.201, fe80::5012:480e:323...
Scheda di rete False vm-w10-n1 InternalVnet40 00155D002802 {Ok} {192.168.40.200}
Scheda di rete False vm-w10-n2 InternalVnet40 00155D002803 {Ok} {192.168.40.201}
Network Adapter False vm-w2k19-pre External 00155D002806 {}
Seems like that the virtual nic that Hyper-V creates was not bound to the physical nic.
Any suggestion?
I'm also trying if there is the same behavior with the 17623 Semi-Annual build. I'll let you know.
Marco
Hello Matt,
I think I found the solution to the issue and posted the reply on the post created about it on this same forum: https://techcommunity.microsoft.com/t5/Windows-Server-Insiders/Windows-Server-2019-Preview-Build-17623-Hyper-V-guest-virtual/m-p/177343/highlight/false#M324
Thanks for your support.
Marco
Hi Marco,
Good to hear that you might have found a solution.
I am curious about your previous post though, you have both a vEthernet (External) adapter and a vEthernet (Internal) adapter on your VM Host. Are you using the vEthernet (Internal) adapter?
In my environment if my VM Host has more than one physical NIC I tend to Team them for redundancy and performance. I do this before I install the Hyper-V role.
I can post the PowerShell commands that I use to create a teamed NIC. Then after installing Hyper-V role I disable DHCP and tcpip6, set a static IP Address and DNS on the Hyper-V Virtual Ethernet Adapter.
Also Project Honolulu is a good way to manage Server core versions in conjunction with PowerShell and RSAT. Below is the link.
https://www.microsoft.com/en-us/software-download/windowsinsiderpreviewserver
Regards,
Matt
Hello Matt,
I created the internal switch to test the communication between 2 virtual machines that have no need to access other networks; I created the external switch to assign it to a management virtual machine where to I want to install Project Honolulu and RSAT to test them.
Because this is a server for a test I don't teamed the nic (until now) and usually, as you do, I disable dhcp and assign a static address; previously, even on my Windows 10 machine, I've seen that if you install the Hyper-V role it creates a virtual adapter and then bind it to the physical and so the former takes the static ip address of the latter: is it still true or on Windows 10 and on Hyper-V standalone server is so while if I installa Windows Server and then Hyper-V role I may assign different the static ip address to both (virtual and physica) nics?
I thought that create an external switch and check the box to allow to use the management interface does the bind and I have a unique ip address.
What I don't understand?
Marco
