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Hyper-V Server 2106 network adapter issues

IT Services 6 Reputation points
2020-11-04T21:04:11.307+00:00

VM running server 2019 not getting internet access from V-adapter.

2016 Server with 2 Broadcom NetXtreme Gig adapters show internet access (#1 static IP, #2 dhcp)
Created a Hyper-V external Ethernet Adapter off of #2 adapter above and shows internet access (allow mgmt checked)
Assigned V-adapter to 2019VM but does not get internet connection (however, shows on 2016 server that it has internet access)
All adapters have updated drivers. I have recreated adapters/ switch/ VM.

No luck.

Windows Server 2016
Windows Server 2016
A Microsoft server operating system that supports enterprise-level management updated to data storage.
2,402 questions
Hyper-V
Hyper-V
A Windows technology providing a hypervisor-based virtualization solution enabling customers to consolidate workloads onto a single server.
2,577 questions
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  1. Dave Patrick 426.2K Reputation points MVP
    2020-11-05T19:33:49.447+00:00

    So I'm baffled. Thinking it must be the adapters.

    Yes, that's correct. That confirms the route is there. I'd get rid of the extra unused adapters.
    https://learn.microsoft.com/en-us/troubleshoot/windows-server/networking/connectivity-issues-multiple-default-gateways
    https://support.microsoft.com/en-us/help/175767/how-multiple-adapters-on-the-same-network-are-expected-to-behave

    it isn't clear whether domain or workgroup. If a domain then the single remaining adapter should have the static ip address of domain controller listed for DNS and no others such as router or public DNS

    --please don't forget to Accept as answer if the reply is helpful--

    1 person found this answer helpful.
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  2. Dave Patrick 426.2K Reputation points MVP
    2020-11-04T21:36:47.41+00:00

    Please post the results of ipconfig /all and tracert 8.8.8.8 for the problem member.

    --please don't forget to Accept as answer if the reply is helpful--

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  3. IT Services 6 Reputation points
    2020-11-05T01:36:16.05+00:00

    Thanks!

    C:\Users\zzzyyy>ipconfig /all

    Windows IP Configuration

    Host Name . . . . . . . . . . . . : POLK-Venus
    Primary Dns Suffix . . . . . . . : APIWC.local
    Node Type . . . . . . . . . . . . : Hybrid
    IP Routing Enabled. . . . . . . . : No
    WINS Proxy Enabled. . . . . . . . : No
    DNS Suffix Search List. . . . . . : APIWC.local

    Ethernet adapter Ethernet:

    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : IBM USB Remote NDIS Network Device
    Physical Address. . . . . . . . . : 9E-5A-44-02-79-79
    DHCP Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes
    Link-local IPv6 Address . . . . . : fe80::c8b5:173f:170c:be13%20(Preferred)
    IPv4 Address. . . . . . . . . . . : 169.254.95.120(Preferred)
    Subnet Mask . . . . . . . . . . . : 255.255.255.0
    Lease Obtained. . . . . . . . . . : Wednesday, November 4, 2020 2:09:53 PM
    Lease Expires . . . . . . . . . . : Wednesday, November 4, 2020 5:39:53 PM
    Default Gateway . . . . . . . . . :
    DHCP Server . . . . . . . . . . . : 169.254.95.118
    DHCPv6 IAID . . . . . . . . . . . : 127818308
    DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-27-33-9C-B0-9E-5A-44-02-79-79
    DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
    fec0:0:0:ffff::2%1
    fec0:0:0:ffff::3%1
    NetBIOS over Tcpip. . . . . . . . : Enabled

    Ethernet adapter em1:

    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Broadcom NetXtreme Gigabit Ethernet
    Physical Address. . . . . . . . . : 9C-5A-44-02-79-74
    DHCP Enabled. . . . . . . . . . . : No
    Autoconfiguration Enabled . . . . : Yes
    Link-local IPv6 Address . . . . . : fe80::9dca:4757:9581:5f26%13(Preferred)
    IPv4 Address. . . . . . . . . . . : 192.168.1.238(Preferred)
    Subnet Mask . . . . . . . . . . . : 255.255.255.0
    Default Gateway . . . . . . . . . : 192.168.1.254
    DHCPv6 IAID . . . . . . . . . . . : 362568260
    DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-27-33-9C-B0-9E-5A-44-02-79-79
    DNS Servers . . . . . . . . . . . : 192.168.1.238
    192.168.1.239
    NetBIOS over Tcpip. . . . . . . . : Enabled

    Ethernet adapter vEthernet (Broadcom NetXtreme Gigabit Ethernet #2 - Virtual Switch):

    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Hyper-V Virtual Ethernet Adapter #2
    Physical Address. . . . . . . . . : 9C-5A-44-02-79-75
    DHCP Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes
    Link-local IPv6 Address . . . . . : fe80::19e9:64e7:c2e4:a65d%18(Preferred)
    IPv4 Address. . . . . . . . . . . : 192.168.1.97(Preferred)
    Subnet Mask . . . . . . . . . . . : 255.255.255.0
    Lease Obtained. . . . . . . . . . : Wednesday, November 4, 2020 2:09:53 PM
    Lease Expires . . . . . . . . . . : Wednesday, November 4, 2020 7:09:53 PM
    Default Gateway . . . . . . . . . : 192.168.1.254
    DHCP Server . . . . . . . . . . . : 192.168.1.254
    DHCPv6 IAID . . . . . . . . . . . : 429677124
    DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-27-33-9C-B0-9E-5A-44-02-79-79
    DNS Servers . . . . . . . . . . . : 192.168.1.238
    75.75.75.75
    75.75.76.76
    NetBIOS over Tcpip. . . . . . . . : Enabled

    Tunnel adapter isatap.{A09CCC5A-85EC-4D5D-9286-C0A75C4242EF}:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Microsoft ISATAP Adapter
    Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
    DHCP Enabled. . . . . . . . . . . : No
    Autoconfiguration Enabled . . . . : Yes

    Tunnel adapter isatap.{BF8FF445-8C78-4E6F-9F2F-39D750AA6408}:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Microsoft ISATAP Adapter #2
    Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
    DHCP Enabled. . . . . . . . . . . : No
    Autoconfiguration Enabled . . . . : Yes

    Tunnel adapter isatap.{C8E237C8-D158-4BBB-BC6D-22C0C29D061C}:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Microsoft ISATAP Adapter #3
    Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
    DHCP Enabled. . . . . . . . . . . : No
    Autoconfiguration Enabled . . . . : Yes

    Tracing route to dns.google [8.8.8.8]
    over a maximum of 30 hops:

    1 2 ms 2 ms 4 ms 75-147-136-134-SFBA.hfc.comcastbusiness.net [75.147.136.134]
    2 29 ms 14 ms 13 ms 96.120.89.237
    3 13 ms 17 ms 12 ms po-301-1216-rur02.sfpine.ca.sfba.comcast.net [96.108.161.69]
    4 28 ms 27 ms 12 ms po-2-rur01.sfpine.ca.sfba.comcast.net [68.87.226.129]
    5 18 ms 27 ms 26 ms be-212-rar01.santaclara.ca.sfba.comcast.net [68.87.193.133]
    6 27 ms 18 ms 25 ms be-299-ar01.santaclara.ca.sfba.comcast.net [68.86.143.93]
    7 22 ms 18 ms 19 ms 96.112.146.26
    8 28 ms 18 ms 28 ms 74.125.37.224
    9 18 ms 17 ms 16 ms 108.170.237.107
    10 20 ms 28 ms 14 ms dns.google [8.8.8.8]

    Trace complete.

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  4. Dave Patrick 426.2K Reputation points MVP
    2020-11-05T01:52:02.65+00:00

    That confirms the route is there. I'd get rid of the extra unused adapters.
    https://learn.microsoft.com/en-us/troubleshoot/windows-server/networking/connectivity-issues-multiple-default-gateways
    https://support.microsoft.com/en-us/help/175767/how-multiple-adapters-on-the-same-network-are-expected-to-behave

    it isn't clear whether domain or workgroup. If a domain then the single remaining adapter should have the static ip address of domain controller listed for DNS and no others such as router or public DNS

    --please don't forget to Accept as answer if the reply is helpful--

    0 comments
  5. Candy Luo 12,671 Reputation points Microsoft Vendor
    2020-11-05T07:07:47.97+00:00

    Hi ,

    Based on my understanding, you Hyper-V host is server 2016 and have two Broadcom NetXtreme Gig adapters. (#1 static IP, #2 dhcp) You create a external switch with #2 adapter and assign this switch to server 2019 VM, but server 2019 VM has no internet access. Is that right? Please feel free to let me know if my understanding is wrong.

    If yes, please run windows network diagnostics on your 2019 VM and see if it can repair Internet connection. If not, it will also provide some information for us to troubleshooting.

    Best Regards,

    Candy

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