No routing on my virtual network.

asked 2022-12-28T16:11:53.343+00:00
Marin Marinov 1 Reputation point

Hello, I`m building a lab for test purposes. It has the structure shown on the picture.

The router is a VM running a Windows server configured routing role as per the following article:
https://www.deploymentresearch.com/using-a-virtual-router-for-your-lab-and-test-environment/

It has 3 network cards configured as fallow

172.0.0.1/27 DNS:8.8.8.8 -----> connected to LAN1

*Ethernet 2 | 00-15-5D-01-04-3F ----> "Varna"

--LAN1--
Subnet ID Subnet Address Host Address Range Broadcast Address
1 172.0.0.0 172.0.0.1 - 172.0.0.30 172.0.0.31

172.0.0.33/27 DNS: 8.8.8.8----> connected to LAN2

*Ethernet 4 | 00-15-5D-01-04-3E ---> "Sofia"

--LAN2--
Subnet ID Subnet Address Host Address Range Broadcast Address
2 172.0.0.32 172.0.0.33 - 172.0.0.62 172.0.0.63

Interface3: DHCP ---> it connected to my home router(internet)

DC-1 (It is the Windows server connected to LAN1): 172.0.0.2/27 DNS:8.8.8.8
DC-2 (It is the Windows server connected to LAN2): 172.0.0.34/27 DNS:8.8.8.8

Im able to ping each router interface from any of the windows servers but Im not able to ping the servers from the router. Also, none of the servers is able to ping www.google.com (except the router).

What did I do wrong?

Windows Server 2016
Windows Server 2016
A Microsoft server operating system that supports enterprise-level management, data storage, applications, and communications.
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  1. answered 2022-12-28T18:49:46.077+00:00
    Dave Patrick 328.8K Reputation points Microsoft MVP

    DC-1 (It is the Windows server connected to LAN1): 172.0.0.2/27 DNS:8.8.8.8

    DC-2 (It is the Windows server connected to LAN2): 172.0.0.34/27 DNS:8.8.8.8

    A domain controller and all members must use the address of DC listed for DNS and no others such as router or public DNS on connection properties.

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


  2. answered 2022-12-30T15:50:01.683+00:00
    Marin Marinov 1 Reputation point

    DC-1 and DC-2 are not a domain controllers. They are freshly deployed servers with no roles installed on them.

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  3. answered 2022-12-30T15:55:06.613+00:00
    Dave Patrick 328.8K Reputation points Microsoft MVP

    not able to ping the servers

    I'd check the firewall rule File and Printer Sharing (Echo Request - ICMPv4-In) is set to Enabled and Allow for the network profile in use.

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

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  4. answered 2022-12-31T13:47:23.56+00:00
    Marin Marinov 1 Reputation point

    Hi, it is enabled but there is no ping.

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  5. answered 2023-01-02T13:26:19.247+00:00
    Marin Marinov 1 Reputation point

    Happy New Year! The problem has not been resolved.

    ===Successful pings===

    DC-1 ----> www.google.com
    DC-1 ----> 172.0.0.1 (router)
    DC-1 ----> 172.0.0.33 (router)
    DC-2 ----> www.google.com
    DC-2 ----> 172.0.0.1 (router)
    DC-2 ----> 172.0.0.33 (router)

    ===Unsuccesful pings===
    router ----> 172.0.0.2
    router ----> 172.0.0.34
    DC-1 ----> 172.0.0.34
    DC-2 ----> 172.0.0.2

    As you can see there are no pings between DC-1 and DC-2 as well as from Router to DC-1 and DC-2.

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