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Windows Server 2 NICs - routing problem

Posted on 2011-04-21
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Last Modified: 2012-06-21
Hi,

Following situation;
1 Server 2008 with 2 NICs.
NIC 1: connected to network: 10.0.0.105 with MASK 255.0.0.0 GW 10.0.0.5
NIC 2: connected to NAS: 10.0.10.12 with MASK 255.255.0.0 no GW

Generally it works, BUT when I try to ping into the network then the first ping's answer is "destination host unreachable". The second ping already works normal.
(ping to NAS works just fine)

Here is my "route print":
===========================================================================
Interface List
 14...00 50 56 96 00 09 ......Intel(R) PRO/1000 MT Network Connection #2
 11...00 50 56 96 00 01 ......Intel(R) PRO/1000 MT Network Connection
  1...........................Software Loopback Interface 1
 13...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter
 12...00 00 00 00 00 00 00 e0 Teredo Tunneling Pseudo-Interface
 15...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #2
===========================================================================

IPv4 Route Table
===========================================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0         10.0.0.5       10.0.0.105    266
         10.0.0.0        255.0.0.0         On-link        10.0.0.105    266
         10.0.0.0      255.255.0.0         On-link        10.0.10.12    266
       10.0.0.105  255.255.255.255         On-link        10.0.0.105    266
       10.0.10.12  255.255.255.255         On-link        10.0.10.12    266
     10.0.255.255  255.255.255.255         On-link        10.0.10.12    266
   10.255.255.255  255.255.255.255         On-link        10.0.0.105    266
        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
        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        10.0.0.105    266
        224.0.0.0        240.0.0.0         On-link        10.0.10.12    266
  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        10.0.0.105    266
  255.255.255.255  255.255.255.255         On-link        10.0.10.12    266
===========================================================================
Persistent Routes:
  Network Address          Netmask  Gateway Address  Metric
          0.0.0.0          0.0.0.0         10.0.0.5  Default
===========================================================================

IPv6 Route Table
===========================================================================
Active Routes:
 If Metric Network Destination      Gateway
  1    306 ::1/128                  On-link
  1    306 ff00::/8                 On-link
===========================================================================
Persistent Routes:
  None


I want the connection to work normally in both direction.
Do I have to add a route?
Thanks for your help,

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Question by:menefre
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Accepted Solution

by:
Share-IT earned 1000 total points
ID: 35439597
One of the problems is the overlapping networks.

10.0.0.105 with a mask of 255.0.0.0 (otherwise known as 10.0.0.0/8) is the same network as 10.0.12.2.

basically with with a 10.0.0.0/8 you are saying any address on the 10.x.x.x is on the same network so your ping will go out of the wrong interface. You should change the nas network to 192.168.x.x 255.255.255.0 addresses (or something along those lines).

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Author Comment

by:menefre
ID: 35440954
I will try that tonight and get back to you. Thanks so far!
0
 

Author Comment

by:menefre
ID: 35812053
Worked. I changed the subnet. thank you very much.
0
 

Author Closing Comment

by:menefre
ID: 35812059
I applied the changes as suggested and it works wonderfully. Thanks a lot.
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