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Server 2008 R2 Networking Issues

    Question

  • In order for me to better describe the problem, I'll first describe the setup.

    Server1

    =====

    OS: Server 2008 R2

    IP1: 192.168.4.18 netmask 255.255.255.240 gateway 192.168.4.1

    IP2: 192.168.40.18 netmask 255.255.255.240 no gateway

    Windows Firewall Disabled

    Server2

    =====

    OS: Server 2008 R2

    IP1: 192.168.4.19 netmask 255.255.255.240 gateway 192.168.4.1

    IP2: 192.168.40.19 netmask 255.255.255.240 no gateway

    Windows Firewall Disabled

    Server3

    ======

    OS: FreeBSD

    IP1: 192.168.4.20 netmask 255.255.255.240 gateway 192.168.4.1

    IP2: 192.168.40.20 netmask 255.255.255.240 no gateway

    So here is the problem.

    From Server1 I can ping Server2 and Server3

    From Server2 I can ping Server1 but not Server3

    From Server3 I can ping Server1 but not Server2

    Basically, Server1 can talk to everybody, but Server2 and Server3 cannot talk to each other. Both Server1 and Server2 are setup identically, same network configurations, same updates applied.

    Both my network guy and I are totally stumped. Does anyone have any idea what is going on?

    Tuesday, June 25, 2013 5:51 PM

Answers

  • Hi,

    Thank you for the post.

    "When you perform a ping that uses a name instead of an IP address, the name has to be resolved to an IP address. If the name is that of the server, the IP address is returned as an address from the network adapter that is at the top or bottom of the network bindings order. This usually will be the last network adapter that was installed, and this may not be the interface that you expect to be used. Therefore, the ping command returns an incorrect IP address." - refer to this kb: http://support.microsoft.com/kb/981953/en-us

    Regards,


    Nick Gu - MSFT

    Thursday, June 27, 2013 7:48 AM

All replies

  • Start by making a route print from Server1 and Server2. A bind order must make the ping get out by the wrong NIC.

    Does you ping by IP or hostname ?


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    Wednesday, June 26, 2013 2:25 AM
  • Hi,

    Thank you for the post.

    "When you perform a ping that uses a name instead of an IP address, the name has to be resolved to an IP address. If the name is that of the server, the IP address is returned as an address from the network adapter that is at the top or bottom of the network bindings order. This usually will be the last network adapter that was installed, and this may not be the interface that you expect to be used. Therefore, the ping command returns an incorrect IP address." - refer to this kb: http://support.microsoft.com/kb/981953/en-us

    Regards,


    Nick Gu - MSFT

    Thursday, June 27, 2013 7:48 AM