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Server 2012 Network Route Problems

    Question

  • OK guys and gals let me do my best to explain the problem here.  I have a windows 2012 VM (hosted on a 2008r2 box) that has 2 virtual NIC's assigned to it.  The 2 virtual's are directly linked to 2 physical adapters as well (in other words the 2 nics that this 2012 server has are not shared to anyone else).  The problem is i need this server to be able to talk to the internet and download updated (WSUS and Symantec Live Update) which it does no problem, however, it will not talk to my internal network.  If I do a route print and change the metric of the interface for the internal network then the server can talk to the internal but not the external.  I know what the problem is, just not how to fix it.  From what i can gather the problem is i have 2 default gateways setup.  If i delete the gateway on the internal network then all the systems on the same VLAN as the server can get to it, but systems that are on different vlans require the gateway to know where to go.  This has got me puzzled and pretty annoyed, but there has to be a way to accomplish this. 

    In case it helps here is an output of route print:

    Active Routes:
    Network Destination        Netmask          Gateway       Interface  Metric
              0.0.0.0          0.0.0.0      10.0.88.254      10.0.88.196     10
              0.0.0.0          0.0.0.0    192.168.1.254     192.168.1.56     11
            10.0.88.0    255.255.255.0         On-link       10.0.88.196    261
          10.0.88.196  255.255.255.255         On-link       10.0.88.196    261
          10.0.88.255  255.255.255.255         On-link       10.0.88.196    261
            127.0.0.0        255.0.0.0         On-link         127.0.0.1    306
            127.0.0.1  255.255.255.255         On-link         127.0.0.1    306
      127.255.255.255  255.255.255.255         On-link         127.0.0.1    306
          192.168.1.0    255.255.255.0         On-link      192.168.1.56    261
         192.168.1.56  255.255.255.255         On-link      192.168.1.56    261
        192.168.1.255  255.255.255.255         On-link      192.168.1.56    261
            224.0.0.0        240.0.0.0         On-link         127.0.0.1    306
            224.0.0.0        240.0.0.0         On-link       10.0.88.196    261
            224.0.0.0        240.0.0.0         On-link      192.168.1.56    261
      255.255.255.255  255.255.255.255         On-link         127.0.0.1    306
      255.255.255.255  255.255.255.255         On-link       10.0.88.196    261
      255.255.255.255  255.255.255.255         On-link      192.168.1.56    261
    ===========================================================================


    Rory

    Tuesday, July 09, 2013 8:18 PM

Answers

  • OK so in case anyone else is having this issue, here is how i fixed it.  Set the small internal lan as the first route in the series and open up the subnet to a class a.  Once i changed the mast to 255.0.0.0 all works great.

    Rory

    • Marked as answer by OCDDs Wednesday, July 10, 2013 1:02 PM
    Wednesday, July 10, 2013 1:02 PM